阅读说明：本技术 一种无机耐高温陶瓷耐磨防腐涂料及其制备方法 (Inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint and preparation method thereof ) 是由 贾学明 袁婷 于 2021-07-20 设计创作，主要内容包括：本发明公开了一种无机耐高温陶瓷耐磨防腐涂料及其制备方法。该涂料由包括以下重量份的原料制备而成：无机硅树脂50-70份、二氧化钛3-10份、云母铁红粉3-10份、钨粉1-5份、改性碳化硅5-15份、磷酸盐5-15份、润湿分散剂2份。本发明的无机耐高温陶瓷耐磨防腐涂料,添加了磷酸盐,改变了各组分的含量,使得得到的涂料的耐盐水性得到了显著的提高。本发明的无机耐高温陶瓷耐磨防腐涂料的制备方法中,添加一定量的磷酸盐到改性碳化硅过程中,对涂料的耐盐水性起到了预料不到的作用。(The invention discloses an inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 50-70 parts of inorganic silicon resin, 3-10 parts of titanium dioxide, 3-10 parts of micaceous iron oxide red powder, 1-5 parts of tungsten powder, 5-15 parts of modified silicon carbide, 5-15 parts of phosphate and 2 parts of wetting dispersant. According to the inorganic high-temperature-resistant ceramic wear-resistant anticorrosive coating, phosphate is added, the content of each component is changed, and the salt water resistance of the obtained coating is remarkably improved. In the preparation method of the inorganic high-temperature-resistant ceramic wear-resistant anticorrosive coating, a certain amount of phosphate is added into the modified silicon carbide, so that the unexpected effect on the salt water resistance of the coating is achieved.)

1. The inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint is characterized by being prepared from the following raw materials in parts by weight:

50-70 parts of inorganic silicon resin, 3-10 parts of titanium dioxide, 3-10 parts of micaceous iron oxide red powder, 1-5 parts of tungsten powder, 5-15 parts of modified silicon carbide, 5-15 parts of phosphate and 2 parts of wetting dispersant.

2. The coating of claim 1, wherein the inorganic silicone resin is a mixture of a coupling agent modified nano silica sol, nano alumina and titania sol.

3. The coating according to claim 1 or 2, characterized in that the phosphate is selected from one or more of sodium phosphate, potassium phosphate, ammonium phosphate, zinc phosphate.

4. The coating according to any one of claims 1 to 3, characterized by being prepared from the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

5. A method for preparing a coating according to any one of claims 1 to 4, comprising the steps of:

s01, reacting water, SiC micropowder, a silane coupling agent and phosphate under the protection of nitrogen;

vacuum filtering while the solution is hot, dissolving the filtered product in water for dispersion, and centrifuging and washing;

drying and cooling for later use;

s02, mixing the wetting dispersant with inorganic silicon resin for first dispersion;

adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step S01 and the rest phosphate, and dispersing for the second time to obtain the coating.

6. The method according to claim 5, wherein in S01, the weight ratio of the SiC fine powder, the silane coupling agent and the phosphate is (30-50): (1-3): (2-15).

7. The method according to claim 5 or 6, wherein in S01, the weight ratio of the SiC fine powder, the silane coupling agent and the phosphate is 40: 2: (7.5-8.5).

8. The method according to any one of claims 5 to 7, wherein in S01, the reaction is carried out at 60 to 80 ℃ for 5 to 7 hours with stirring;

and/or in S01, the dispersion is ultrasonic dispersion, preferably 200W ultrasonic dispersion for 12-25 min;

and/or in S01, the drying is carried out in an oven at 80-105 ℃ for 9-12 h;

and/or, in S02, the first dispersing and the second dispersing are both stirring dispersing; the first dispersion is preferably stirred and dispersed at 400-600rpm for 5-15min, and the second dispersion is preferably stirred and dispersed at 800-1200rpm for 20-40 min.

9. The method according to any one of claims 5 to 8, wherein in S01, the weight of the phosphate added to the fine SiC powder and the silane coupling agent is determined according to the following formula:

wherein, a and b are weight coefficients which take the values of 8-10 and 1-3 respectively; w1 is the weight of the SiC micropowder, W2 is the weight of the silane coupling agent, Ws is a weight threshold value, and the value is 40-60 without dimension.

10. The method according to any one of claims 5 to 9, wherein in S02, the first dispersion and the second dispersion are both mechanical agitation dispersions, and the agitation speed of the second dispersion is determined by the following formula:

wherein, R1 is the rotating speed of the first dispersion, k is a constant and takes a value of 2-2.5, and b is an adjusting factor and takes a value of 9-11.

Technical Field

The invention belongs to the technical field of painting, and particularly relates to an inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint and a preparation method thereof.

Background

The high-temperature resistant antirust paint for steel building materials such as automobile, aircraft engine, exhaust pipe, aircraft, ship motor, high-temperature material transmission pipeline and the like is mainly divided into two categories of physical coverage and electrochemical corrosion resistance according to the antirust mechanism. The former forms a compact paint film by using a film forming base material and inorganic filler, antirust pigment and the like added in the film forming base material, such as mica, graphite, silicon carbide, iron oxide red, zinc oxide, phosphate and the like, so as to prevent corrosive substances in the environment from invading; the latter chemical rust inhibiting effect is that the ferrous component, aluminum powder, zinc powder, etc. in phosphate and iron oxide red are added to produce electrochemical action with water, air, carbon dioxide, etc. to protect the base metal from being corroded.

In the early research, patent CN108441002A of the present applicant discloses an inorganic high temperature resistant coating and a preparation method of the inorganic high temperature resistant coating. The inorganic high-temperature-resistant paint selects inorganic silicone resin, nontoxic high-temperature-resistant pigment, metal tungsten powder, silicon carbide and other fillers, so that the prepared paint has high hardness, adhesive force, heat resistance, wear resistance, corrosion resistance, rust resistance, water resistance and good chemicals, and can resist the high temperature of 1650 ℃.

Because the bodies of the vehicle engine and the aircraft engine are large, the conventional coating is not easy to carry out, the coating needs to be automatically dried within 2 hours during application, and the coating cannot be sintered at high temperature. The inorganic high temperature resistant coating disclosed in CN108441002A cannot meet the related requirements.

Disclosure of Invention

The invention is an improvement of patent CN108441002A, and the inorganic high-temperature resistant coating provided by the invention can be suitable for surface coating of engines of various motor vehicles, aerospace products, petrochemical engineering storage tanks and conveying pipelines, high-temperature parts of high-speed rails, glass curtain walls, hairpins, kitchen ware, household appliances, barbecue utensils, military spacecrafts and the like, and has good salt water resistance and quick drying performance.

The invention discloses an inorganic high-temperature-resistant ceramic wear-resistant anticorrosive coating which is prepared from the following raw materials in parts by weight:

50-70 parts of inorganic silicon resin, 3-10 parts of titanium dioxide, 3-10 parts of micaceous iron oxide red powder, 1-5 parts of tungsten powder, 5-15 parts of modified silicon carbide, 5-15 parts of phosphate and 2 parts of wetting dispersant.

In some preferred embodiments of the present invention, the inorganic silicone resin is a mixture of a coupling agent modified nano silica sol, nano alumina and titania sol.

In some preferred embodiments of the present invention, the composition is prepared from the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

The second aspect of the invention discloses a preparation method of the inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint, which comprises the following steps:

s01, reacting water, SiC micropowder, a silane coupling agent and phosphate under the protection of nitrogen;

vacuum filtering while the solution is hot, dissolving the filtered product in water for dispersion, and centrifuging and washing;

drying and cooling for later use;

s02, mixing the wetting dispersant with inorganic silicon resin for first dispersion;

adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step S01 and the rest phosphate, and dispersing for the second time to obtain the coating.

In some preferred embodiments of the present invention, in S01, the weight ratio of the SiC fine powder, the silane coupling agent, and the phosphate is (30-50): (1-3): (2-15).

In some more preferred embodiments of the present invention, in S01, the weight ratio of the SiC fine powder, the silane coupling agent, and the phosphate is 40: 2: (7.5-8.5).

In some preferred embodiments of the invention, the reaction is carried out at S01 at 60-80 ℃ for 5-7h with stirring.

In some preferred embodiments of the present invention, in S01, the dispersion is ultrasonic dispersion, preferably 200W ultrasonic dispersion for 12-25 min.

In some preferred embodiments of the present invention, in S01, the drying is drying in an oven at 80-105 ℃ for 9-12 h.

In some preferred embodiments of the present invention, in S02, the first dispersing and the second dispersing are both stirring dispersing; the first dispersion is preferably stirred and dispersed at 400-600rpm for 5-15min, and the second dispersion is preferably stirred and dispersed at 800-1200rpm for 20-40 min.

In some preferred embodiments of the present invention, in S01, the weight of phosphate added to the fine SiC powder and the silane coupling agent is determined according to the following formula:

wherein, a and b are weight coefficients which take the values of 8-10 and 1-3 respectively; w1 is the weight of the SiC micropowder, W2 is the weight of the silane coupling agent, Ws is a weight threshold value, and the value is 40-60 without dimension.

In some preferred embodiments of the present invention, in S02, the first dispersing and the second dispersing are both mechanical stirring dispersing, and the stirring speed of the second dispersing is determined by the following formula:

wherein, R1 is the rotating speed of the first dispersion, k is a constant and takes a value of 2-2.5, and b is an adjusting factor and takes a value of 9-11.

The invention has the beneficial effects that:

(1) according to the inorganic high-temperature-resistant ceramic wear-resistant anticorrosive coating, phosphate is added, the content of each component is changed, and the salt water resistance of the obtained coating is remarkably improved. In the preparation method of the inorganic high-temperature-resistant ceramic wear-resistant anticorrosive coating, a certain amount of phosphate is added into the modified silicon carbide, so that the unexpected effect on the salt water resistance of the coating is achieved.

(2) The inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint disclosed by the invention takes inorganic silicon resin and titanium dioxide as main raw materials, takes micaceous iron red powder, tungsten powder, modified silicon carbide, phosphate and wetting dispersant as additives, and is high in drying speed and short in drying time within 2 h.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

The inorganic silicon resin is KW-5009 produced by Shenzhen, Uigai, and the main component is a mixture of nano silica sol, nano alumina and titanium dioxide sol modified by a special coupling agent, has super adhesive force, can reach 0 grade on a metal base material, is good in flexibility, high in film hardness after being cured, can reach 8H, good in aging resistance, long in service life, and good in compatibility with pigments and fillers, and the service life of the cured film can reach 50 years. The particle size of the tungsten powder is 80-100 meshes. The ultrasonic dispersion was carried out in a 200W ultrasonic cleaner. The wetting dispersant is VXL6212, and is a cationic polymer dispersant.

Unless otherwise specified, the examples and comparative examples are parallel tests with the same components, component contents, preparation steps, preparation parameters.

Example 1

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder, 2g of silane coupling agent and 2g of zinc phosphate are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and the residual zinc phosphate, and stirring and dispersing for 30min at 1000 rpm;

wherein, the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) is deducted during metering, and the residual zinc phosphate is the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) subtracted by the formula content of zinc phosphate.

Example 2

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder, 2g of silane coupling agent and 4g of zinc phosphate are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and the residual zinc phosphate, and stirring and dispersing for 30min at 1000 rpm;

wherein, the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) is deducted during metering, and the residual zinc phosphate is the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) subtracted by the formula content of zinc phosphate.

Example 3

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder, 2g of silane coupling agent and 6g of zinc phosphate are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and the residual zinc phosphate, and stirring and dispersing for 30min at 1000 rpm;

wherein, the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) is deducted during metering, and the residual zinc phosphate is the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) subtracted by the formula content of zinc phosphate.

Example 4

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder, 2g of silane coupling agent and 8g of zinc phosphate are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and the residual zinc phosphate, and stirring and dispersing for 30min at 1000 rpm;

wherein, the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) is deducted during metering, and the residual zinc phosphate is the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) subtracted by the formula content of zinc phosphate.

Example 5

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder, 2g of silane coupling agent and 10g of zinc phosphate are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and the residual zinc phosphate, and stirring and dispersing for 30min at 1000 rpm;

wherein, the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) is deducted during metering, and the residual zinc phosphate is the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) subtracted by the formula content of zinc phosphate.

Example 6

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder, 2g of silane coupling agent and 15g of zinc phosphate are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and the residual zinc phosphate, and stirring and dispersing for 30min at 1000 rpm;

wherein, the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) is deducted during metering, and the residual zinc phosphate is the weight of zinc phosphate in the modified silicon carbide obtained in the step (1) subtracted by the formula content of zinc phosphate.

Example 7

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of potassium phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder, 2g of silane coupling agent and 8g of potassium phosphate are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and the rest potassium phosphate, and stirring and dispersing for 30min at 1000 rpm;

wherein, the weight of potassium phosphate in the modified silicon carbide obtained in the step (1) is deducted during metering, and the residual potassium phosphate is the weight of potassium phosphate in the modified silicon carbide obtained in the step (1) subtracted by the formula content of potassium phosphate.

Example 8

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of ammonium phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder, 2g of silane coupling agent and 8g of ammonium phosphate are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and the rest ammonium phosphate, and stirring and dispersing for 30min at 1000 rpm;

wherein, the weight of ammonium phosphate in the modified silicon carbide obtained in the step (1) is deducted during metering, and the rest ammonium phosphate is the weight obtained by subtracting the weight of ammonium phosphate in the modified silicon carbide obtained in the step (1) from the formula content of the ammonium phosphate

Example 9

The preparation method of the inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint is different from the preparation method of the example 1 in that in S01, the weight of phosphate added into SiC micropowder and a silane coupling agent is determined according to the following formula:

wherein, a and b are weight coefficients which take the values of 8-10 and 1-3 respectively; w1 is the weight of the SiC micropowder, W2 is the weight of the silane coupling agent, Ws is a weight threshold value, and the value is 40-60 without dimension.

The weight of the phosphate determined by the method of the embodiment, relative to the weight of the SiC micropowder and the silane coupling agent, is beneficial to improving the influence of salt water resistance due to the modification of the phosphate on the silicon carbide. The weight of the phosphate which is lower or higher than the weight is weak in the range of improving the salt water resistance and is close to 0.

Example 10

A method for preparing an inorganic high-temperature-resistant ceramic wear-resistant anticorrosive coating, which is different from that in example 1, in S02, the first dispersion and the second dispersion are both mechanical stirring dispersions, and the stirring speed of the second dispersion is determined by the following formula:

wherein, R1 is the rotating speed of the first dispersion, k is a constant and takes a value of 2-2.5, and b is an adjusting factor and takes a value of 9-11.

The stirring speed determined by the embodiment can be used for rapidly determining the appropriate stirring speed and stirring the coating fully, so that the product is stirred fully.

Comparative example 1

An inorganic high-temperature-resistant ceramic wear-resistant anticorrosive paint comprises the following raw materials in parts by weight:

55 parts of inorganic silicon resin, 5 parts of titanium dioxide, 5 parts of micaceous iron oxide red powder, 3 parts of tungsten powder, 10 parts of modified silicon carbide, 10 parts of zinc phosphate and 2 parts of wetting dispersant.

The preparation method comprises the following steps:

preparation of 1 silicon carbide

(1) 340mL of water, 40g of SiC micropowder and 2g of silane coupling agent are added into a three-neck round-bottom flask, the temperature is raised to 70 ℃ under the protection of nitrogen, and the mixture is stirred and reacts for 6 hours.

(2) And after the reaction is finished, carrying out vacuum filtration on the hot product, dissolving the filtered product in water, carrying out ultrasonic dispersion for 20min, and carrying out centrifugal washing.

(4) Drying in an oven at 100 deg.C for 10h, and cooling.

2, preparation of the coating:

(1) mixing the wetting dispersant with inorganic silicon resin, and stirring and dispersing at 500rpm for 10 min;

(2) adding titanium dioxide, micaceous iron oxide red powder, tungsten powder, the modified silicon carbide obtained in the step (1) and zinc phosphate, and stirring and dispersing for 30min at 1000 rpm.

Examples of the experiments

The inorganic high temperature resistant ceramic wear-resistant anticorrosive coatings obtained according to the examples and comparative examples were measured for salt water resistance according to the method of CN108441002A, and the results are shown in Table 1.

TABLE 1 salt water resistance (60 ℃ C.) of the inorganic high temperature resistant ceramic wear-resistant anticorrosive coating

	Salt water resistance per hour
		Example 1	5.0b
Example 2	4.5b
		Example 3	5.0b
Example 4	6.5c
		Example 5	4.5b
Example 6	4.5b
		Example 7	4.5b
Example 8	5.0b
		Comparative example 1	3.0a

In the same column of data, marked with different lower case letters to represent significant difference, P is less than 0.05

The inorganic high-temperature-resistant ceramic wear-resistant anticorrosive coatings obtained according to the examples and comparative examples are coated according to the conventional method and thickness, and the drying time is examined. The coatings of examples 1-8 all had drying times within 2 hours. CN108441002A, the coating of example 1, was applied according to the same procedure and thickness, with a drying time exceeding 2 h.

While the preferred embodiments and examples of the present invention have been described in detail, the present invention is not limited to the embodiments and examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.