阅读说明：本技术 一种不锈钢除锈防锈膏 (Stainless steel rust removing and preventing paste ) 是由 姚慧超 袁世权 胡馨丹 于 2019-04-01 设计创作，主要内容包括：本发明涉及一种不锈钢除锈防锈膏,其特征在于包括螯合剂20-30份、聚合物0-10份、缓蚀剂10-30份、摩擦剂5-15份、非离子表面活性剂1-10份、黄原胶1-3份、水10-67份；所述缓蚀剂为改性羟基乙叉二膦酸；所述改性羟基乙叉二膦酸的制备方法如下：取质量浓度为40％的羟基乙叉二膦酸溶液,按溶液质量的25-35wt％添加相应量的硅烷偶联剂KH560,60-80℃下搅拌回流反应1-3h,最后加入三乙醇胺,调节pH值为8-10,即得到所述改性羟基乙叉二膦酸。与现有技术相比,本发明所提供的不锈钢防锈除锈膏呈弱碱性,不需要浸泡,可直接擦拭,立即除锈,除锈容易,除锈效果好,且能够有效防止返锈。(The invention relates to a rust removing and preventing paste for stainless steel, which is characterized by comprising 20-30 parts of chelating agent, 0-10 parts of polymer, 10-30 parts of corrosion inhibitor, 5-15 parts of friction agent, 1-10 parts of nonionic surfactant, 1-3 parts of xanthan gum and 10-67 parts of water; the corrosion inhibitor is modified hydroxyethylidene diphosphonic acid; the preparation method of the modified hydroxyethylidene diphosphonic acid comprises the following steps: taking a hydroxyethylidene diphosphonic acid solution with the mass concentration of 40%, adding a corresponding amount of silane coupling agent KH560 according to 25-35 wt% of the solution, stirring and refluxing for 1-3h at the temperature of 60-80 ℃, finally adding triethanolamine, and adjusting the pH value to 8-10 to obtain the modified hydroxyethylidene diphosphonic acid. Compared with the prior art, the rust-preventing and rust-removing paste for the stainless steel is alkalescent, does not need to be soaked, can be directly wiped, can immediately remove rust, is easy to remove the rust, has a good rust-removing effect, and can effectively prevent rust return.)

1. The rust removing and preventing paste for the stainless steel is characterized by comprising the following components in parts by weight:

the chelating agent is at least one selected from sodium gluconate, sodium citrate, ethylene diamine tetraacetic acid sodium salt, sodium tartrate, sodium polyaspartate, trisodium methylglycinediacetate, diethyl diamido pentaphosphate, hydroxyethylidene diphosphonic acid, aminotrimethylene phosphate and phytate;

the polymer is at least one selected from polyacrylic acid homopolymer and polyacrylic acid copolymer with molecular weight of 3000-4000;

the nonionic surfactant is at least one selected from polyethylene glycol nonionic surfactants, polyoxyethylene fatty acid esters, alkyl glycoside type nonionic surfactants, fatty acid alkylolamides and amine oxides;

the corrosion inhibitor is modified hydroxyethylidene diphosphonic acid; the preparation method of the modified hydroxyethylidene diphosphonic acid comprises the following steps:

taking a hydroxyethylidene diphosphonic acid solution with the mass concentration of 40%, adding a corresponding amount of silane coupling agent KH560 according to 25-35 wt% of the solution, stirring and refluxing for 1-3h at the temperature of 60-80 ℃, finally adding triethanolamine, and adjusting the pH value to 8-10 to obtain the modified hydroxyethylidene diphosphonic acid.

2. The rust removing and preventing paste for stainless steel according to claim 1, characterized in that the copolymer of polyacrylic acid is acrylic acid-styrene copolymer or acrylic acid-maleic anhydride copolymer.

3. The rust removing and preventing paste for stainless steel according to claim 1 or 2, characterized in that the abrasive is alumina and/or silica; the particle size of the friction agent is 200-500 meshes.

4. The rust removing and preventing paste for stainless steel of claim 3, which is characterized by comprising the following components in parts by weight:

the acrylic-styrene copolymer had an average molecular weight of 3000.

5. The method for preparing the rust removing and preventing paste for stainless steel according to any one of claims 1 to 4, characterized by comprising the following steps:

uniformly mixing the chelating agent, sodium gluconate with corresponding mass, a polymer and a corrosion inhibitor, adding water, adding the nonionic surfactant after complete dissolution, uniformly stirring, heating to 50 ℃, adding the xanthan gum under the stirring condition of 200-700rpm, and continuously stirring at the original rotating speed to obtain a paste;

and adding the friction agent into the paste, grinding and uniformly mixing in a grinder to obtain the stainless steel rust removing and preventing paste.

Technical Field

The invention relates to the field of fine chemical engineering, in particular to a rust removing and preventing paste for stainless steel.

Background

Stainless steel is not easy to rust, so that the application range in life and industry is wide, but the stainless steel can rust when placed outdoors or the protection method is not proper, more rust spots are formed, and pitting corrosion can be generated if the stainless steel cannot be removed in time, so that the appearance is influenced and even the stainless steel is used. When rusted on household appliances or equipment, the rust is difficult to remove by directly using a rag, if the steel wire ball is used for wiping, on one hand, the rust removing effect is poor, on the other hand, the surface is scratched, the appearance is influenced, and the scratched part is easy to generate further corrosion.

Most of the existing rust removers are acidic, and can achieve a good rust removing effect after being soaked for a period of time. However, the acid rust remover is easy to further corrode metal, and has the disadvantages of slow rust removal, undesirable effect and poor use experience. In addition, the acidic rust remover easily causes rust return.

Disclosure of Invention

The invention aims to solve the technical problem of providing the stainless steel rust removing and preventing paste which does not need to be soaked, can remove rust immediately and has the functions of efficiently removing rust and preventing rust return aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the rust removing and preventing paste for the stainless steel is characterized by comprising the following components in parts by weight:

the chelating agent is at least one selected from sodium gluconate, sodium citrate, ethylene diamine tetraacetic acid sodium salt, sodium tartrate, sodium polyaspartate, trisodium methylglycinediacetate, diethyl diamido pentaphosphate, hydroxyethylidene diphosphonic acid, aminotrimethylene phosphate and phytate;

the polymer is at least one selected from polyacrylic acid homopolymer and polyacrylic acid copolymer with molecular weight of 3000-4000;

the nonionic surfactant is at least one selected from polyethylene glycol nonionic surfactants, polyoxyethylene fatty acid esters, alkyl glycoside type nonionic surfactants, fatty acid alkylolamides and amine oxides;

the corrosion inhibitor is modified hydroxyethylidene diphosphonic acid; the preparation method of the modified hydroxyethylidene diphosphonic acid comprises the following steps:

taking a hydroxy ethylidene diphosphonic acid solution with the mass concentration of 40%, adding 25-35 wt% of the solution, adding a silane coupling agent KH560, stirring and refluxing at 60-80 ℃ for 1-3h, finally adding triethanolamine, and adjusting the pH value to 8-10 to obtain the modified hydroxy ethylidene diphosphonic acid.

Preferably, the copolymer of polyacrylic acid is an acrylic acid-styrene copolymer or an acrylic acid-maleic anhydride copolymer.

Preferably, the abrasive is alumina and/or silica; the particle size of the friction agent is 200-500 meshes.

The preferable stainless steel rust removing paste comprises the following components in parts by weight:

the acrylic-styrene copolymer had an average molecular weight of 3000.

The preparation method of the rust removing and preventing paste for stainless steel is characterized by comprising the following steps:

uniformly mixing the chelating agent, sodium gluconate with corresponding mass, a polymer and a corrosion inhibitor, adding water, adding the nonionic surfactant after complete dissolution, uniformly stirring, adding the xanthan gum under the stirring condition of 200-700rpm, and continuously stirring at the original rotating speed until a paste is obtained;

and adding the friction agent into the paste, grinding and uniformly mixing in a grinder to obtain the stainless steel rust removing and preventing paste.

Compared with the prior art, the rust-preventing and rust-removing paste for the stainless steel is alkalescent, does not need to be soaked, can be directly wiped, can immediately remove rust, is easy to remove the rust, has a good rust-removing effect, and can effectively prevent rust return.

Detailed Description

The present invention will be described in further detail with reference to examples.

Preparing modified hydroxyethylidene diphosphonic acid:

taking 40% hydroxyethylidene diphosphonic acid solution, adding gamma-glycidoxypropyltrimethoxysilane (namely a silane coupling agent KH560, which is substituted by KH 560) according to 32.5 wt% of the solution, stirring and refluxing for 1h at the temperature of 80 ℃, finally adding triethanolamine, and adjusting the pH value to 8.5 to obtain the modified hydroxyethylidene diphosphonic acid.