阅读说明：本技术 一种锈转剂的制备方法 (Preparation method of rust conversion agent ) 是由 孙皋飞 于 2021-07-05 设计创作，主要内容包括：本发明公开了一种锈转剂的制备方法,包括以下步骤：第一步：在混合桶内加入6-30重量份的水和6-30重量份的乙醇,混合搅拌均匀；第二步：再加入1-5重量份的单宁酸,并进行边添加边搅拌,搅拌至固体物完全溶解；第三步：再依次加入0.3-1.5重量份的异丙醇、1-5重量份的植酸,不断搅拌至溶液澄清,制得A液；第四步：在6-30重量份的大漆乳液中加入0.2-1重量份的黄酮类物质、0.2-1重量份的植酸、0.2-1重量份的生物有机酸,充分搅拌混合,制得B液。本发明侵入性能强,渗入锈层深处,与铁锈、漆膜、金属晶粒实现螯合,进而形成均匀、致密、螯合力极强的钝化反应膜与交联包覆膜,进而阻止进一步氧化锈蚀的发生。(The invention discloses a preparation method of a rust conversion agent, which comprises the following steps: the first step is as follows: adding 6-30 parts by weight of water and 6-30 parts by weight of ethanol into a mixing barrel, and uniformly mixing and stirring; the second step is that: adding 1-5 parts by weight of tannic acid, stirring while adding, and stirring until the solid is completely dissolved; the third step: sequentially adding 0.3-1.5 parts by weight of isopropanol and 1-5 parts by weight of phytic acid, and continuously stirring until the solution is clear to obtain solution A; the fourth step: adding 0.2-1 weight parts of flavonoids, 0.2-1 weight parts of phytic acid and 0.2-1 weight parts of biological organic acid into 6-30 weight parts of the lacquer emulsion, and fully stirring and mixing to obtain solution B. The invention has strong invasion performance, and can infiltrate into the deep part of the rust layer to realize chelation with the rust, the paint film and the metal crystal grains, thereby forming a passivation reaction film and a cross-linking coating film which are uniform, compact and extremely strong in chelation force, and further preventing further oxidation and corrosion.)

1. The preparation method of the rust conversion agent is characterized by comprising the following steps:

the first step is as follows: adding 6-30 parts by weight of water and 6-30 parts by weight of ethanol into a mixing barrel, and uniformly mixing and stirring;

the second step is that: adding 1-5 parts by weight of tannic acid, stirring while adding, and stirring until the solid is completely dissolved;

the third step: sequentially adding 0.3-1.5 parts by weight of isopropanol and 1-5 parts by weight of phytic acid, and continuously stirring until the solution is clear to obtain solution A;

the fourth step: adding 0.2-1 weight part of flavonoid, 0.2-1 weight part of phytic acid and 0.2-1 weight part of biological organic acid into 6-30 weight parts of lacquer emulsion, and fully stirring and mixing to prepare solution B;

the fifth step: slowly adding the solution A prepared in the third step into the solution B prepared in the fourth step, adding 0.1-0.5 part by weight of defoaming agent while stirring, continuously stirring at room temperature for 20-35 minutes, and stirring until the solution is uniform, milky and semitransparent, thus obtaining the embroidery transfer agent.

2. The method for preparing a rust conversion agent according to claim 1, wherein the stirring time in the first step is 5-10 minutes, and the stirring speed is 1500 r/min.

3. The method for preparing a rust conversion agent according to claim 1, wherein the stirring time in the fourth step is 15-25 minutes, and the stirring speed is 2000 r/min.

4. The method for preparing a rust converting agent according to claim 1, wherein the defoaming agent added in the fifth step is trimethyl silicone oil.

5. The method for preparing a rust conversion agent according to claim 1, wherein the flavonoid added in the fourth step is rice hull flavonoid.

6. The method for preparing a rust conversion agent according to claim 1, wherein the bio-organic acid added in the fourth step is one or more of citric acid or oxalic acid.

7. The method of claim 1, wherein the water added in the first step is deionized water.

Technical Field

The invention relates to the technical field of antirust coatings, in particular to a preparation method of a rust conversion agent.

Background

Steel can corrode under natural conditions, which not only affects the appearance of the steel, but also causes major safety accidents. In the prior art, an anticorrosive paint is usually adopted to treat a steel substrate, and strict surface rust removal treatment is carried out before the steel substrate is coated. After rusting occurs, two modes of mechanical rust removal and chemical rust removal are generally adopted, the process is complex, and certain damage can be caused to the environment. Particularly, the existing steel base material buildings can only adopt an artificial rust removal mode, and the rust removal effect is difficult to meet the requirement, so that the subsequent coating effect cannot reach the expectation.

Rust-bearing coating is a way to solve the above problems, and in recent years, different types of rust conversion coatings have appeared, and the rust conversion coatings cannot penetrate into parts with serious rust, and the film-forming sealing performance after conversion is not good enough.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a preparation method of a rust conversion agent.

In order to achieve the purpose, the invention adopts the following technical scheme:

a preparation method of a rust conversion agent comprises the following steps:

the first step is as follows: adding 6-30 parts by weight of water and 6-30 parts by weight of ethanol into a mixing barrel, and uniformly mixing and stirring;

the second step is that: adding 1-5 parts by weight of tannic acid, stirring while adding, and stirring until the solid is completely dissolved;

the third step: sequentially adding 0.3-1.5 parts by weight of isopropanol and 1-5 parts by weight of phytic acid, and continuously stirring until the solution is clear to obtain solution A;

the fourth step: adding 0.2-1 weight part of flavonoid, 0.2-1 weight part of phytic acid and 0.2-1 weight part of biological organic acid into 6-30 weight parts of lacquer emulsion, and fully stirring and mixing to prepare solution B;

the fifth step: slowly adding the solution A prepared in the third step into the solution B prepared in the fourth step, adding 0.1-0.5 part by weight of defoaming agent while stirring, continuously stirring at room temperature for 20-35 minutes, and stirring until the solution is uniform, milky and semitransparent, thus obtaining the embroidery transfer agent.

Preferably, the stirring time in the first step is 5-10 minutes, and the stirring speed is 1500 r/min.

Preferably, the stirring time in the fourth step is 15-25 minutes, and the stirring speed is 2000 r/min.

Preferably, the defoaming agent added in the fifth step is trimethyl silicone oil.

Preferably, the flavonoid substance added in the fourth step is rice hull flavonoid.

Preferably, the bio-organic acid added in the fourth step may be one or more of citric acid or oxalic acid.

Preferably, the water added in the first step is deionized water.

The invention has the beneficial effects that:

1. under the condition that the iron and steel materials are distributed throughout the residual rust paint, the paint can penetrate into the deep of the rust layer by utilizing the super-strong water invasion performance, and can be chelated with the rust, the paint film and the metal crystal grains, so that a uniform, compact and extremely strong-chelating-force passivation reaction film and a cross-linking coating film are formed, and further oxidation and corrosion are prevented.

2. The lacquer in the raw materials makes the lacquer film firmer and more durable, and has excellent corrosion resistance.

3. The rice hull flavone has good water solubility, so that the coating can easily permeate into the interior of an object, and metal ions are chelated to form a compact reaction film to prevent the object from being further oxidized.

4. The phytic acid and the tannic acid have extremely strong chelating force, can be chelated and connected with various inorganic particles to form compact chelate, and have a chelating constant which is several times that of other chelating agents, so the phytic acid and the tannic acid have extraordinary anti-corrosion performance.

5. The organic acid can block the gap which is not blocked at the initial coating stage of the coating, so that the long-term anticorrosion effect is exerted, and microorganisms in the organic acid adsorb heavy metal ions through the cell surface with charges per se or combine the metabolites with the heavy metal to generate precipitate, so that the chelation effect of the organic acid is facilitated.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

A preparation method of a rust conversion agent comprises the following steps:

the first step is as follows: adding 6 parts by weight of deionized water and 6 parts by weight of ethanol into a mixing barrel, and uniformly mixing and stirring for 5 minutes at a stirring speed of 1500 r/min;

the second step is that: adding 1 weight part of tannic acid, stirring while adding, and stirring until the solid is completely dissolved;

the third step: sequentially adding 0.3 weight part of isopropanol and 1 weight part of phytic acid, and continuously stirring until the solution is clear to prepare solution A;

the fourth step: adding 0.2 part by weight of rice hull flavone, 0.2 part by weight of phytic acid and 0.2 part by weight of citric acid into 6 parts by weight of lacquer emulsion, and fully stirring and mixing, wherein the stirring time in the fourth step is 15 minutes, and the stirring speed is 2000r/min, so as to prepare a solution B;

the fifth step: slowly adding the solution A prepared in the third step into the solution B prepared in the fourth step, adding 0.1 part by weight of trimethyl silicone oil as a defoaming agent while stirring, continuously stirring at room temperature for 20 minutes, and stirring until the solution is uniform, milky and semitransparent, thus obtaining the embroidery transfer agent.

Example two

A preparation method of a rust conversion agent comprises the following steps:

the first step is as follows: adding 18 parts by weight of deionized water and 18 parts by weight of ethanol into a mixing barrel, and uniformly mixing and stirring for 6 minutes at a stirring speed of 1500 r/min;

the second step is that: adding 2 parts by weight of tannic acid, stirring while adding, and stirring until the solid is completely dissolved;

the third step: sequentially adding 0.4 weight part of isopropanol and 2 weight parts of phytic acid, and continuously stirring until the solution is clear to prepare solution A;

the fourth step: adding 0.3 part by weight of rice hull flavone, 0.4 part by weight of phytic acid and 0.3 part by weight of citric acid into 18 parts by weight of lacquer emulsion, and fully stirring and mixing, wherein the stirring time in the fourth step is 19 minutes, and the stirring speed is 2000r/min, so as to prepare a solution B;

the fifth step: slowly adding the solution A prepared in the third step into the solution B prepared in the fourth step, adding 0.2 part by weight of trimethyl silicone oil as a defoaming agent while stirring, continuously stirring at room temperature for 25 minutes, and stirring until the solution is uniform, milky and semitransparent, thus obtaining the embroidery transfer agent.

EXAMPLE III

A preparation method of a rust conversion agent comprises the following steps:

the first step is as follows: adding 20 parts by weight of deionized water and 22 parts by weight of ethanol into a mixing barrel, and uniformly mixing and stirring for 6 minutes at a stirring speed of 1500 r/min;

the second step is that: adding 2 parts by weight of tannic acid, stirring while adding, and stirring until the solid is completely dissolved;

the third step: sequentially adding 1 weight part of isopropanol and 3 weight parts of phytic acid, and continuously stirring until the solution is clear to prepare solution A;

the fourth step: adding 0.4 part by weight of rice hull flavone, 0.4 part by weight of phytic acid and 0.3 part by weight of citric acid into 23 parts by weight of lacquer emulsion, and fully stirring and mixing, wherein the stirring time in the fourth step is 20 minutes, and the stirring speed is 2000r/min, so as to prepare a solution B;

the fifth step: slowly adding the solution A prepared in the third step into the solution B prepared in the fourth step, adding 0.4 part by weight of trimethyl silicone oil as a defoaming agent while stirring, continuously stirring at room temperature for 26 minutes, and stirring until the solution is uniform, milky and semitransparent, thus obtaining the embroidery transfer agent.

Example four

A preparation method of a rust conversion agent comprises the following steps:

the first step is as follows: adding 25 parts by weight of deionized water and 25 parts by weight of ethanol into a mixing barrel, and uniformly mixing and stirring for 7 minutes at a stirring speed of 1500 r/min;

the second step is that: adding 4 parts by weight of tannic acid, stirring while adding, and stirring until the solid is completely dissolved;

the third step: sequentially adding 1.3 parts by weight of isopropanol and 1-5 parts by weight of phytic acid, and continuously stirring until the solution is clear to prepare solution A;

the fourth step: adding 0.7 part by weight of rice hull flavone, 0.7 part by weight of phytic acid and 0.8 part by weight of citric acid into 26 parts by weight of lacquer emulsion, and fully stirring and mixing, wherein the stirring time in the fourth step is 24 minutes, and the stirring speed is 2000r/min, so as to prepare a solution B;

the fifth step: slowly adding the solution A prepared in the third step into the solution B prepared in the fourth step, adding 0.4 part by weight of trimethyl silicone oil as a defoaming agent while stirring, continuously stirring at room temperature for 32 minutes, and stirring until the solution is uniform, milky and semitransparent, thus obtaining the embroidery transfer agent.

EXAMPLE five

A preparation method of a rust conversion agent comprises the following steps:

the first step is as follows: adding 29 parts by weight of deionized water and 30 parts by weight of ethanol into a mixing barrel, and uniformly mixing and stirring for 10 minutes at a stirring speed of 1500 r/min;

the second step is that: adding 5 parts by weight of tannic acid, stirring while adding, and stirring until the solid is completely dissolved;

the third step: sequentially adding 1.4 parts by weight of isopropanol and 5 parts by weight of phytic acid, and continuously stirring until the solution is clear to prepare solution A;

the fourth step: adding 1 part by weight of rice hull flavone, 1 part by weight of phytic acid and 1 part by weight of citric acid into 30 parts by weight of lacquer emulsion, and fully stirring and mixing, wherein the stirring time in the fourth step is 25 minutes, and the stirring speed is 2000r/min, so as to prepare a solution B;

the fifth step: slowly adding the solution A prepared in the third step into the solution B prepared in the fourth step, adding 0.5 part by weight of trimethyl silicone oil as a defoaming agent while stirring, continuously stirring at room temperature for 35 minutes, and stirring until the solution is uniform, milky and semitransparent, thus obtaining the embroidery transfer agent.

Performance testing

	Permeability rate of penetration	Rust transformation situation	Salt spray resistance
				Common coating in market	Is lower than	About 60 percent	No abnormal condition for 200 hours
Example one	Is stronger	Is substantially complete	No abnormal condition after 400 hours
				Example two	Is stronger	Is totally produced from	No abnormal condition after 600h
EXAMPLE III	Is stronger	Is totally produced from	No abnormal condition after 600h

TABLE 1

It is seen from table 1 that the rust conversion agent of the embodiment of the present invention has stronger permeability, can effectively prevent rust from continuing to develop, and has excellent salt spray resistance due to the formation of a dense passivation reaction film and a cross-linked coating film.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.