Wear-resistant stainless steel welded pipe and preparation process thereof
阅读说明：本技术 一种耐磨不锈钢焊管及其制备工艺 (Wear-resistant stainless steel welded pipe and preparation process thereof ) 是由 王会森 孙晓林 张将 于 2021-09-06 设计创作，主要内容包括：本申请涉及一种耐磨不锈钢焊管及其制备工艺,一种耐磨不锈钢焊管,包括管体,管体表面涂覆耐磨涂料,耐磨涂料包括如下重量份数的组分：40-50份环氧树脂；10-15份聚甲醛树脂；6-8份季戊四醇；2-3份聚半乳糖醛酸；2-3份无机填料；一种耐磨不锈钢焊管的制备工艺,包括耐磨涂料的制备和耐磨涂料的喷涂。本申请具有以下优点和效果：聚甲醛树脂与环氧树脂之间具有较好的结合性能,改善环氧树脂的脆性,从而使耐磨涂料具有良好的耐磨性能；无机填料与季戊四醇混合进一步通过聚半乳糖醛酸的添加,使聚半乳糖醛酸和季戊四醇反应,得到的产物可使无机填料与环氧树脂之间具有良好的界面结合性,提升耐磨涂料的耐磨效果,提高不锈钢焊管的耐磨性。(The application relates to a wear-resistant stainless steel welded pipe and a preparation process thereof, and the wear-resistant stainless steel welded pipe comprises a pipe body, wherein the surface of the pipe body is coated with a wear-resistant coating, and the wear-resistant coating comprises the following components in parts by weight: 40-50 parts of epoxy resin; 10-15 parts of polyformaldehyde resin; 6-8 parts of pentaerythritol; 2-3 parts of polygalacturonic acid; 2-3 parts of inorganic filler; a process for preparing the antiwear welded stainless steel pipe includes preparing antiwear paint and spraying it. The application has the following advantages and effects: the polyformaldehyde resin and the epoxy resin have good bonding performance, and the brittleness of the epoxy resin is improved, so that the wear-resistant coating has good wear resistance; the inorganic filler is mixed with pentaerythritol, the polygalacturonic acid and the pentaerythritol are further reacted through the addition of the polygalacturonic acid, and the obtained product can enable the inorganic filler and the epoxy resin to have good interfacial bonding performance, so that the wear-resistant effect of the wear-resistant coating is improved, and the wear resistance of the stainless steel welded pipe is improved.)
1. The utility model provides a wear-resisting stainless steel welded tube, includes the body, its characterized in that: the wear-resistant coating is coated on the surface of the pipe body and comprises the following components in parts by weight:
40-50 parts of epoxy resin;
10-15 parts of polyformaldehyde resin;
6-8 parts of pentaerythritol;
2-3 parts of polygalacturonic acid;
2-3 parts of inorganic filler.
2. A wear resistant stainless steel welded tube according to claim 1, characterized in that: the wear-resistant coating also comprises 3-4 parts of poly (p-phenylene-benzobisthiazole), 1-1.5 parts of n-butyl boric acid and 0.2-0.3 part of catalyst in parts by weight.
3. A wear resistant stainless steel welded tube according to claim 2, characterized in that: the catalyst is Ni (CO)4。
4. A wear resistant stainless steel welded tube according to claim 1, characterized in that: the wear-resistant coating also comprises 1-2 parts of methyltetrahydrophthalic anhydride by weight.
5. A wear-resistant stainless steel welded tube according to claim 4, characterized in that: the wear-resistant coating also comprises 1-2 parts by weight of potassium silicate and 4-5 parts by weight of terpinyl acetate.
6. A wear resistant stainless steel welded tube according to claim 1, characterized in that: the inorganic filler is nano calcium carbonate.
7. The process for preparing a wear-resistant stainless steel welded pipe according to claim 1, comprising the steps of:
s1, preparing wear-resistant paint; mixing pentaerythritol and inorganic filler, stirring for 10-15min, adding polygalacturonic acid, heating to 30-40 deg.C, and stirring for 30-35min to obtain viscous product;
stirring and mixing the epoxy resin and the polyformaldehyde resin at the temperature of 80-90 ℃ for 50-60min, adding the viscous product, and continuously stirring for 50-60min to obtain the wear-resistant coating;
s2, spraying wear-resistant paint; shot blasting is carried out on the stainless steel welded pipe, the stainless steel welded pipe is heated to 50-60 ℃, the wear-resistant coating prepared in the step S1 is sprayed on the stainless steel welded pipe by adopting an airless sprayer, and then the stainless steel welded pipe is heated to 90-100 ℃ again and is placed for 8-10min, so that the coating is solidified; and cooling by using circulating water to obtain the finished stainless steel welded pipe.
8. The process for preparing a wear-resistant stainless steel welded pipe according to claim 7, wherein the process comprises the following steps: the S1 further includes the steps of:
3-4 parts of poly-p-phenylene benzothiazole, 1-1.5 parts of n-butyl boric acid and 0.2-0.3 part of catalyst are mixed, heated to 70-80 ℃, stirred for reaction for 50-60min, then mixed with 40-50 parts of epoxy resin, and stirred for 40-45min under the condition of 80-90 ℃ to obtain a first product;
mixing 1-2 parts of methyltetrahydrophthalic anhydride and 10-15 parts of polyformaldehyde resin, heating to 70-80 ℃, and stirring for 20-25min to obtain a second product;
mixing 6-8 parts of pentaerythritol and 2-3 parts of inorganic filler, stirring for 10-15min, adding 2-3 parts of polygalacturonic acid, heating to 30-40 ℃, and continuously stirring for 30-35min to obtain a viscous product;
mixing and stirring 1-2 parts of potassium silicate and 4-5 parts of terpinyl acetate at the rotation speed of 150-;
mixing the first product and the second product, and stirring for 1-1.5h at 80-90 ℃; then adding the viscous product, and continuously stirring for 50-60 min; and finally, adding the dispersion product, and stirring for 30-40min to obtain the wear-resistant coating.
Technical Field
The application relates to the technical field of stainless steel welded pipes, in particular to a wear-resistant stainless steel welded pipe and a preparation process thereof.
Background
The stainless steel welded pipe is a stainless steel pipe which is made by welding a stainless steel band or a stainless steel open plate after being curled and formed by a unit and a mould, and is also called as a welded pipe for short.
The prior Chinese patent with publication number CN112410842A discloses a preparation method of a high-temperature oxidation resistant stainless steel pipe, belonging to the field of stainless steel pipe manufacture; a composite film layer is plated on the surface of the stainless steel by utilizing the electrodeposition coating film, and then the component content of the stainless steel is optimized, so that the stainless steel keeps the original excellent physical properties, and the high-temperature oxidation resistance of the stainless steel pipe is greatly improved.
However, in the existing conveying pipelines used in dredger, sand-blowing ship, power plant and mine, the traditional common stainless steel welded pipe has the defects of easy abrasion, short service life and the like, so the existing stainless steel welded pipe still needs to be improved.
Disclosure of Invention
In order to improve the wear resistance of the stainless steel welded pipe, the application provides the wear-resistant stainless steel welded pipe and the preparation process thereof.
In a first aspect, the application provides a wear-resistant stainless steel welded pipe adopts following technical scheme:
the wear-resistant stainless steel welded pipe comprises a pipe body, wherein the surface of the pipe body is coated with a wear-resistant coating, and the wear-resistant coating comprises the following components in parts by weight:
40-50 parts of epoxy resin;
10-15 parts of polyformaldehyde resin;
6-8 parts of pentaerythritol;
2-3 parts of polygalacturonic acid;
2-3 parts of inorganic filler.
By adopting the technical scheme, the polyformaldehyde resin has high atomic density and surface hardness along the molecular chain direction, macromolecules are easy to orient and strengthen along the friction direction in the friction process, and the polyformaldehyde resin has good bonding performance with the epoxy resin, so that the brittleness of the epoxy resin is improved, and the wear-resistant coating has good wear resistance; the inorganic filler is added to mix the inorganic filler with pentaerythritol to realize uniform dispersion in the epoxy resin, the polygalacturonic acid and the pentaerythritol are reacted through the addition of the polygalacturonic acid, the obtained product can enable the inorganic filler and the epoxy resin to have good interface bonding performance, and meanwhile, the product has a certain modification effect on the epoxy resin, so that the toughening and wear-resisting effects of the wear-resisting coating can be remarkably improved, the wear resistance of the stainless steel welded pipe is improved, and the service life is prolonged.
Preferably, the wear-resistant coating further comprises 3-4 parts of poly (p-phenylene-benzobisthiazole), 1-1.5 parts of n-butyl boric acid and 0.2-0.3 part of catalyst in parts by weight.
By adopting the technical scheme, the poly-p-phenylene benzothiazole has the advantages of high strength and high toughness, and the fatigue crack propagation performance of the epoxy resin can be effectively improved by the obtained product through the reaction of the poly-p-phenylene benzothiazole and the n-butyl boric acid in the presence of the catalyst, so that the wear resistance of the wear-resistant coating is better improved.
Preferably, the catalyst is Ni (CO)4。
By adopting the technical scheme, the transition metal Ni (CO) is adopted4The catalyst can better catalyze the full reaction of the poly-p-phenylene benzothiazole and the n-butyl boric acid, and improve the performance of the product.
Preferably, the wear-resistant coating further comprises 1-2 parts by weight of methyltetrahydrophthalic anhydride.
By adopting the technical scheme, the addition of the methyltetrahydrophthalic anhydride reacts with the polyformaldehyde resin to generate a synergistic effect, so that the reactivity is improved, the viscosity of a system is increased, a cross-linked network is formed, the curing efficiency can be improved, and the mechanical property is improved.
Preferably, the wear-resistant coating also comprises 1-2 parts by weight of potassium silicate and 4-5 parts by weight of terpinyl acetate.
By adopting the technical scheme, the potassium silicate is dispersed in the continuous-phase terpinyl acetate by the micro-particles and the aggregates thereof, and the crack growth is prevented by the existence of the micro-particles, so that the damage energy is increased; meanwhile, the potassium silicate can be decomposed in the presence of methyltetrahydrophthalic anhydride to precipitate silicon dioxide, and the precipitated silicon dioxide can achieve better uniform dispersibility under the action of continuous-phase terpinyl acetate, so that the coating has an excellent toughening effect and effectively improves the wear resistance of the wear-resistant coating.
Preferably, the inorganic filler is nano calcium carbonate.
By adopting the technical scheme, the aim of toughening is achieved by introducing the fine nano calcium carbonate into the epoxy resin system, and the wear-resistant effect of the wear-resistant coating is improved.
In a second aspect, the present application provides a process for preparing a wear-resistant stainless steel welded pipe, which adopts the following technical scheme:
a preparation process of a wear-resistant stainless steel welded pipe comprises the following steps:
s1, preparing wear-resistant paint; mixing pentaerythritol and inorganic filler, stirring for 10-15min, adding polygalacturonic acid, heating to 30-40 deg.C, and stirring for 30-35min to obtain viscous product;
stirring and mixing the epoxy resin and the polyformaldehyde resin at the temperature of 80-90 ℃ for 50-60min, adding the viscous product, and continuously stirring for 50-60min to obtain the wear-resistant coating;
s2, spraying wear-resistant paint; shot blasting is carried out on the stainless steel welded pipe, the stainless steel welded pipe is heated to 50-60 ℃, the wear-resistant coating prepared in the step S1 is sprayed on the stainless steel welded pipe by adopting an airless sprayer, and then the stainless steel welded pipe is heated to 90-100 ℃ again and is placed for 8-10min, so that the coating is solidified; and cooling by using circulating water to obtain the finished stainless steel welded pipe.
Preferably, the S1 further includes the following steps:
3-4 parts of poly-p-phenylene benzothiazole, 1-1.5 parts of n-butyl boric acid and 0.2-0.3 part of catalyst are mixed, heated to 70-80 ℃, stirred for reaction for 50-60min, then mixed with 40-50 parts of epoxy resin, and stirred for 40-45min under the condition of 80-90 ℃ to obtain a first product;
mixing 1-2 parts of methyltetrahydrophthalic anhydride and 10-15 parts of polyformaldehyde resin, heating to 70-80 ℃, and stirring for 20-25min to obtain a second product;
mixing 6-8 parts of pentaerythritol and 2-3 parts of inorganic filler, stirring for 10-15min, adding 2-3 parts of polygalacturonic acid, heating to 30-40 ℃, and continuously stirring for 30-35min to obtain a viscous product;
mixing and stirring 1-2 parts of potassium silicate and 4-5 parts of terpinyl acetate at the rotation speed of 150-;
mixing the first product and the second product, and stirring for 1-1.5h at 80-90 ℃; then adding the viscous product, and continuously stirring for 50-60 min; and finally, adding the dispersion product, and stirring for 30-40min to obtain the wear-resistant coating.
To sum up, the application comprises the following beneficial technical effects:
1. the polyformaldehyde resin has high atom density along the molecular chain direction and high surface hardness, macromolecules are easy to orient and strengthen along the friction direction in the friction process, and the polyformaldehyde resin has good bonding performance with the epoxy resin, so that the brittleness of the epoxy resin is improved; the inorganic filler is mixed with pentaerythritol to improve the dispersity, and polygalacturonic acid and pentaerythritol are further added for reaction, so that the inorganic filler and the epoxy resin have good interface binding property, and meanwhile, the epoxy resin has a certain modification effect, the toughening and wear-resisting effects of the wear-resisting coating are improved, the wear resistance of the stainless steel welded pipe is further improved, and the service life is prolonged;
2. the poly (p-phenylene-benzobisthiazole) has the advantages of high strength and high toughness, and the obtained product can effectively improve the fatigue crack propagation property of the epoxy resin by the reaction of the poly (p-phenylene-benzobisthiazole) and n-butyl boric acid in the presence of a catalyst, so that the wear resistance of the wear-resistant coating is better improved;
3. the addition of the methyltetrahydrophthalic anhydride reacts with the polyformaldehyde resin to generate a synergistic effect, so that the reaction activity is improved, the viscosity of a system is increased, a cross-linked network is formed, the curing efficiency can be improved, and the mechanical property is improved;
4. potassium silicate is dispersed in continuous phase terpinyl acetate in the form of microparticles and aggregates thereof, and crack growth is prevented by the presence of the microparticles, so that the destruction energy is increased; meanwhile, the potassium silicate can be decomposed in the presence of methyltetrahydrophthalic anhydride to precipitate silicon dioxide, and the precipitated silicon dioxide can achieve better uniform dispersibility under the action of continuous-phase terpinyl acetate, so that the coating has an excellent toughening effect and effectively improves the wear resistance of the wear-resistant coating.
Detailed Description
The present application is described in further detail below.
In this application, the polyoxymethylene resin is a polyoxymethylene resin produced by the Chihong plastification Co., Ltd, the manufacturer: tangshan Zhonghao, cat # K90-1; polygalacturonic acid is manufactured by shanghai spectral vibration biotechnology limited, under the brand name: a Clarmar; the nano calcium carbonate is produced by Beijing Nano Take nano science and technology GmbH; n-butyl boronic acid is produced by the scientific biotechnology limited of the scientific department of warrior and warrior; methyltetrahydrophthalic anhydride was produced by Hubeixin Rundchi chemical Co.
The airless sprayer used was a GRACO45:1 airless sprayer.
The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.
Examples
Example 1
The application discloses a wear-resistant stainless steel welded pipe and a preparation process thereof; the wear-resistant stainless steel welded pipe comprises a pipe body, wherein the surface of the pipe body is coated with wear-resistant paint, and the wear-resistant paint comprises the following components: epoxy resin, polyformaldehyde resin, pentaerythritol, polygalacturonic acid and inorganic filler; wherein the inorganic filler is nano calcium carbonate.
A preparation process of a wear-resistant stainless steel welded pipe comprises the following steps:
s1, preparing wear-resistant paint; mixing pentaerythritol and inorganic filler, stirring for 10min, adding polygalacturonic acid, heating to 30 ℃, and continuing stirring for 30min to obtain a viscous product;
stirring and mixing the epoxy resin and the polyformaldehyde resin at 80 ℃ for 50min, adding the viscous product, and continuously stirring for 50min to obtain the wear-resistant coating;
s2, spraying wear-resistant paint; shot blasting is carried out on the stainless steel welded pipe, the stainless steel welded pipe is heated to 50 ℃, the wear-resistant coating prepared in the step S1 is sprayed on the stainless steel welded pipe by adopting an airless sprayer, and then the stainless steel welded pipe is heated to 90 ℃ again and is placed for 8min, so that the coating is solidified; and cooling by using circulating water to obtain the finished stainless steel welded pipe.
The contents of the components are shown in table 1 below.
Example 2
The application discloses a wear-resistant stainless steel welded pipe and a preparation process thereof; the wear-resistant stainless steel welded pipe comprises a pipe body, wherein the surface of the pipe body is coated with wear-resistant paint, and the wear-resistant paint comprises the following components: epoxy resin, polyformaldehyde resin, pentaerythritol, polygalacturonic acid and inorganic filler; wherein the inorganic filler is nano calcium carbonate.
A preparation process of a wear-resistant stainless steel welded pipe comprises the following steps:
s1, preparing wear-resistant paint; mixing pentaerythritol and inorganic filler, stirring for 15min, adding polygalacturonic acid, heating to 40 deg.C, and stirring for 35min to obtain viscous product;
stirring and mixing the epoxy resin and the polyformaldehyde resin at 90 ℃ for 60min, adding the viscous product, and continuously stirring for 60min to obtain the wear-resistant coating;
s2, spraying wear-resistant paint; shot blasting is carried out on the stainless steel welded pipe, the stainless steel welded pipe is heated to 60 ℃, the wear-resistant coating prepared in the step S1 is sprayed on the stainless steel welded pipe by adopting an airless sprayer, and then the stainless steel welded pipe is heated to 100 ℃ again and is placed for 10min, so that the coating is solidified; and cooling by using circulating water to obtain the finished stainless steel welded pipe.
The contents of the components are shown in table 1 below.
Example 3
The application discloses a wear-resistant stainless steel welded pipe and a preparation process thereof; the wear-resistant stainless steel welded pipe comprises a pipe body, wherein the surface of the pipe body is coated with wear-resistant paint, and the wear-resistant paint comprises the following components: epoxy resin, polyformaldehyde resin, pentaerythritol, polygalacturonic acid and inorganic filler; wherein the inorganic filler is nano calcium carbonate.
A preparation process of a wear-resistant stainless steel welded pipe comprises the following steps:
s1, preparing wear-resistant paint; mixing pentaerythritol and an inorganic filler, stirring for 13min, adding polygalacturonic acid, heating to 35 ℃, and continuing stirring for 32min to obtain a viscous product;
stirring and mixing the epoxy resin and the polyformaldehyde resin at 85 ℃ for 55min, adding the viscous product, and continuously stirring for 55min to obtain the wear-resistant coating;
s2, spraying wear-resistant paint; shot blasting is carried out on the stainless steel welded pipe, the stainless steel welded pipe is heated to 55 ℃, the wear-resistant coating prepared in the step S1 is sprayed on the stainless steel welded pipe by adopting an airless sprayer, and then the stainless steel welded pipe is heated to 95 ℃ again and is placed for 9min, so that the coating is solidified; and cooling by using circulating water to obtain the finished stainless steel welded pipe.
The contents of the components are shown in table 1 below.
Example 4
The difference from the embodiment 1 is that the application discloses a wear-resistant stainless steel welded pipe and a preparation process thereof; the wear-resistant stainless steel welded pipe comprises a pipe body, wherein the surface of the pipe body is coated with wear-resistant paint, and the wear-resistant paint comprises the following components: epoxy resin, polyformaldehyde resin, pentaerythritol, polygalacturonic acid, an inorganic filler, poly (p-phenylene-benzobisthiazole), n-butyl boric acid, a catalyst, methyl tetrahydrophthalic anhydride, potassium silicate and terpinyl acetate; wherein the inorganic filler is nano calcium carbonate, and the catalyst is Ni (CO)4。
A preparation process of a wear-resistant stainless steel welded pipe comprises the following steps of S1:
poly-p-phenylene benzothiazole, n-butyl boric acid and catalyst Ni (CO)4Blending, heating to 70 ℃, stirring for reaction for 50min, blending with epoxy resin, and continuously stirring for 40min at 80 ℃ to obtain a first product;
mixing methyl tetrahydrophthalic anhydride and polyformaldehyde resin, heating to 70 ℃, and stirring for 20min to obtain a second product;
mixing pentaerythritol and inorganic filler, stirring for 10min, adding polygalacturonic acid, heating to 30 ℃, and continuously stirring for 30min to obtain a viscous product;
mixing potassium silicate and terpinyl acetate at a rotation speed of 150r/min, and stirring for 10min to obtain a dispersion product;
mixing the first product and the second product, and stirring 1 at 80 ℃; then adding the viscous product, and continuing stirring for 50 min; and finally, adding the dispersion product, and stirring for 30min to obtain the wear-resistant coating.
The contents of the components are shown in table 1 below.
Example 5
The difference from the embodiment 2 is that the application discloses a wear-resistant stainless steel welded pipe and a preparation process thereof; a wear-resistant stainless steel welded pipe comprises a pipe body, wherein the surface of the pipe body is coated with wear-resistant paint and wear-resistant paintComprises the following components: epoxy resin, polyformaldehyde resin, pentaerythritol, polygalacturonic acid, an inorganic filler, poly (p-phenylene-benzobisthiazole), n-butyl boric acid, a catalyst, methyl tetrahydrophthalic anhydride, potassium silicate and terpinyl acetate; wherein the inorganic filler is nano calcium carbonate, and the catalyst is Ni (CO)4。
A preparation process of a wear-resistant stainless steel welded pipe comprises the following steps of S1:
poly-p-phenylene benzothiazole, n-butyl boric acid and catalyst Ni (CO)4Blending, heating to 80 ℃, stirring for reaction for 60min, blending with epoxy resin, and continuously stirring for 45min at 90 ℃ to obtain a first product;
mixing methyl tetrahydrophthalic anhydride and polyformaldehyde resin, heating to 80 ℃, and stirring for 25min to obtain a second product;
mixing pentaerythritol and inorganic filler, stirring for 15min, adding polygalacturonic acid, heating to 40 deg.C, and stirring for 35min to obtain viscous product;
mixing potassium silicate and terpinyl acetate at a rotation speed of 200r/min, and stirring for 15min to obtain a dispersion product;
mixing the first product and the second product, and stirring for 1.5h at 90 ℃; then adding the viscous product, and continuing stirring for 60 min; and finally, adding the dispersion product, and stirring for 40min to obtain the wear-resistant coating.
The contents of the components are shown in table 1 below.
Example 6
The difference from the embodiment 3 is that the application discloses a wear-resistant stainless steel welded pipe and a preparation process thereof; the wear-resistant stainless steel welded pipe comprises a pipe body, wherein the surface of the pipe body is coated with wear-resistant paint, and the wear-resistant paint comprises the following components: epoxy resin, polyformaldehyde resin, pentaerythritol, polygalacturonic acid, an inorganic filler, poly (p-phenylene-benzobisthiazole), n-butyl boric acid, a catalyst, methyl tetrahydrophthalic anhydride, potassium silicate and terpinyl acetate; wherein the inorganic filler is nano calcium carbonate, and the catalyst is Ni (CO)4。
A preparation process of a wear-resistant stainless steel welded pipe comprises the following steps of S1:
poly-p-phenylene benzothiazole, n-butyl boric acid and catalyst Ni (CO)4Blending, heating to 75 ℃, stirring for reaction for 55min, blending with epoxy resin, and continuously stirring for 43min at 85 ℃ to obtain a first product;
mixing methyl tetrahydrophthalic anhydride and polyformaldehyde resin, heating to 75 ℃, and stirring for 22min to obtain a second product;
mixing pentaerythritol and inorganic filler, stirring for 12min, adding polygalacturonic acid, heating to 35 deg.C, and stirring for 32min to obtain viscous product;
mixing potassium silicate and terpinyl acetate at a rotation speed of 180r/min, and stirring for 12min to obtain a dispersion product;
mixing the first product and the second product, and stirring for 1.2h at 85 ℃; then adding the viscous product, and continuously stirring for 55 min; and finally, adding the dispersion product, and stirring for 35min to obtain the wear-resistant coating.
The contents of the components are shown in table 1 below.
Example 7
The difference from example 1 is that the components of the abrasion-resistant coating also comprise poly (p-phenylene-benzobisthiazole), n-butyl boric acid and a catalyst Ni (CO)4The contents of the components are shown in the following table 2.
Example 8
The difference from example 7 is that poly (p-phenylene-benzobisthiazole) was replaced with polyethylene terephthalate and the contents of the respective components are shown in Table 2 below.
Example 9
The difference from example 7 is that N-butyl boronic acid was replaced with N-butyl p-toluidine and the contents of the components are shown in table 2 below.
Example 10
The difference from example 7 is that the catalyst Ni (CO)4The contents of the components are shown in the following table 2, except that potassium persulfate is used instead.
Example 11
The difference from example 1 is that the components of the abrasion resistant coating further include methyltetrahydrophthalic anhydride, and the content of each component is shown in table 2 below.
Example 12
The difference from example 11 is that methyltetrahydrophthalic anhydride was replaced with 1,2, 4-trimethylbenzene, and the contents of the respective components are shown in Table 2 below.
Example 13
The difference from example 1 is that the components of the abrasion resistant coating further include potassium silicate and terpinyl acetate, and the content of each component is shown in table 2 below.
Example 14
The difference from example 13 is that potassium silicate is replaced by mica powder, and the contents of the respective components are shown in table 2 below.
Example 15
The difference from example 13 is that terpinyl acetate is replaced with di (propylene glycol) methyl ether acetic acid and the contents of each component are shown in table 2 below.
Example 16
The difference from example 1 is that the inorganic filler nano calcium carbonate is replaced by calcium carbonate, and the contents of the components are shown in the following table 2.
Example 17
The difference from example 7 is that the epoxy resin was replaced with an acrylic resin.
Example 18
The difference from example 11 is that the polyoxymethylene resin was replaced with an amino resin.
Comparative example
Comparative example 1
A stainless steel welded pipe not coated with an abrasion resistant coating was used as comparative example 1.
Comparative example 2
The difference from example 1 is that the polyoxymethylene resin was replaced with an amino resin, and the contents of the respective components are shown in table 1 below.
Comparative example 3
The difference from example 1 is that pentaerythritol was replaced by fatty alcohol-polyoxyethylene ether, and the contents of the respective components are shown in table 1 below.
Comparative example 4
The difference from example 1 is that polygalacturonic acid was replaced with polyvinyl n-butyl ether and the contents of the components are shown in table 1 below.
TABLE 1 component content tables of examples 1 to 6 and comparative examples 2 to 4
Example 1
Example 2
Example 3
Example 4
Example 5
Example 6
Comparative example 2
Comparative example 3
Comparative example 4
Epoxy/acrylic resins
40
50
45
40
50
45
40
40
40
Polyoxymethylene resin/amino resin
10
15
13
10
15
13
10
10
10
Pentaerythritol/fatty alcohol polyoxyethylene ether
6
8
7
6
8
7
6
6
6
Polygalacturonic acid/polyvinyl n-butyl ether
2
3
3
2
3
3
2
2
2
Inorganic filler
2
3
2
2
3
2
2
2
2
Poly (p-phenylene) benzodithiazole
/
/
/
3
4
4
/
/
/
N-butyl boronic acid
/
/
/
1
1.5
1.2
/
/
/
Catalyst and process for preparing same
/
/
/
0.2
0.3
0.2
/
/
/
Methyl tetrahydrophthalic anhydride
/
/
/
1
2
2
/
/
/
Potassium silicate
/
/
/
1
2
1
/
/
/
Terpinyl acetate
/
/
/
4
5
5
/
/
/
TABLE 2 ingredient content tables for examples 7-16
Example 7
Example 8
Example 9
Example 10
Example 11
Example 12
Example 13
Example 14
Example 15
Example 16
Epoxy resin
40
40
40
40
40
40
40
40
40
40
Polyoxymethylene resin
10
10
10
10
10
10
10
10
10
10
Pentaerythritol
6
6
6
6
6
6
6
6
6
6
Polygalacturonic acid
2
2
2
2
2
2
2
2
2
2
Inorganic filler
2
2
2
2
2
2
2
2
2
2
Poly (p-phenylene-benzobisthiazole)/poly (ethylene terephthalate)
3
3
3
3
3
3
/
/
/
/
N-Butylboronic acid/N-N-butyl-p-toluidine
1
1
1
1
1
1
/
/
/
/
Catalyst and process for preparing same
0.2
0.2
0.2
0.2
0.2
0.2
/
/
/
/
Methyltetrahydrophthalic anhydride/1, 2, 4-trimethylbenzene
/
/
/
/
1
1
/
/
/
/
Potassium silicate/mica powder
/
/
/
/
/
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1
1
1
/
Terpinyl acetate/di (propylene glycol) methyl ether acetic acid
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/
/
/
/
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4
4
4
/
Performance test
The test method comprises the following steps: each of examples and comparative examples was prepared as a sample of 50mm × 30mm × 30mm, and wear resistance was characterized by wear rate; the wear rate is tested by adopting a universal friction wear testing machine, and the test conditions are as follows: the test force is 50N, the rotating speed is 250r/min, the test time is 30min, and the calculation formula of the wear rate is as follows: the wear rate is (mass before friction-mass after friction)/mass before friction × 100%; the greater the wear rate, the poorer the wear resistance; the test results are shown in table 3 below.
TABLE 3 table of results of performance test of each example and comparative example
Rate of wear/%)
Example 1
0.49
Example 2
0.25
Example 3
0.36
Example 4
0.25
Example 5
0.09
Example 6
0.16
Example 7
0.30
Example 8
0.42
Example 9
0.45
Example 10
0.35
Example 11
0.34
Example 12
0.47
Example 13
0.32
Example 14
0.39
Example 15
0.38
Example 16
0.52
Example 17
0.58
Example 18
0.55
Comparative example 1
1.94
Comparative example 2
0.62
Comparative example 3
0.52
Comparative example 4
0.55
In summary, the following conclusions can be drawn:
1. poly (p-phenylene) benzodithiazole, n-butyl boric acid and catalyst Ni (CO)4The specific addition of the titanium dioxide, the addition of the potassium silicate and the terpinyl acetate and the common addition of the potassium silicate and the terpinyl acetate can better improve the wear resistance of the obtained wear-resistant coating, thereby improving the wear resistance of the stainless steel welded pipe.
2. According to examples 1, 7 to 10 and 17 in combination with Table 3, it can be seen that poly-p-phenylene-benzobisthiazole, n-butylboronic acid and catalyst Ni (CO)4Has a certain synergistic effect with the epoxy resin, and can play a role in improving the toughening and wear resistance.
3. According to the examples 1, 11 to 12 and 18 and the table 3, it is known that the addition of the methyltetrahydrophthalic anhydride can modify the polyoxymethylene resin to a certain extent, thereby achieving the purpose of improving the toughness and the wear resistance.
4. According to example 1 and comparative example 1 in combination with table 3, it can be seen that the stainless steel welded pipe coated with the abrasion resistant coating of the present application has better abrasion resistance.
5. According to the embodiment 1, the embodiment 16 and the comparative examples 2 to 4 and the combination of the table 3, it can be known that the specific addition of the polyformaldehyde resin, the pentaerythritol nano calcium carbonate and the polygalacturonic acid has the significant effect of improving the wear-resisting effect of the wear-resisting coating, and can effectively improve the wear resistance of the stainless steel welded pipe.
The present embodiment is only for explaining the present application, and the protection scope of the present application is not limited thereby, and those skilled in the art can make modifications to the present embodiment without inventive contribution as needed after reading the present specification, but all are protected by patent law within the scope of the claims of the present application.
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