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Environment-friendly rust removal phosphating agent and preparing and using method thereof

A kind of derusting and phosphating agent, an environmentally friendly technology, applied in the coating process of metal materials, etc., can solve the problems of unevenness and loose phosphating film, etc., to enhance adhesion, prevent over-corrosion and hydrogen embrittlement, and enhance rust prevention performance effect

Active Publication Date: 2017-07-18
ANSHAN FALAN STEEL STRIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of looseness and unevenness of the phosphating film formed by the existing environment-friendly rust-removing phosphating agent, and provide an environment-friendly rust-removing and phosphating agent and its preparation and use method

Method used

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  • Environment-friendly rust removal phosphating agent and preparing and using method thereof
  • Environment-friendly rust removal phosphating agent and preparing and using method thereof
  • Environment-friendly rust removal phosphating agent and preparing and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of environment-friendly rust-removing phosphating agent, its chemical composition is made up of following mass percentage:

[0039] Phosphoric acid: 55%;

[0040] Aluminum dihydrogen phosphate: 3%;

[0041] Ferric nitrate: 3%;

[0042] Sodium nitrate: 3%;

[0043] Thiourea: 0.5%;

[0044] Cetylamine: 1.5%

[0045] Sodium secondary alkyl sulfonate: 0.2%;

[0046] Block polyether F68: 0.3%;

[0047] Water: 33.5%.

[0048] The preparation method of above-mentioned environment-friendly rust-removing phosphating agent is as follows:

[0049] Take materials according to the chemical composition distribution ratio of the above-mentioned environment-friendly rust removal and phosphating agent, add nitrate, dihydrogen phosphate, composite corrosion inhibitor thiourea and cetylamine into the water, stir until completely dissolved at room temperature, and then add phosphoric acid And surfactant sodium secondary alkyl sulfonate and block polyether F68, after fully st...

Embodiment 2

[0054] A kind of environment-friendly rust-removing phosphating agent, its chemical composition is made up of following mass percentage:

[0055] Phosphoric acid: 45%;

[0056] Manganese dihydrogen phosphate: 2%;

[0057] Zinc dihydrogen phosphate: 4%;

[0058] Zinc nitrate: 0.2%;

[0059] Potassium nitrate: 0.8%;

[0060] Thiourea: 0.3%;

[0061] Cetylamine: 0.3%;

[0062] Herotropine: 0.4%;

[0063] Sodium secondary alkyl sulfonate: 1.5%;

[0064] Block polyether L64: 1.5%;

[0065] Water: 44%.

[0066] The application method of the above-mentioned environment-friendly rust-removing and phosphating agent in the rust-removing and phosphating of iron and steel surfaces is as follows:

[0067] Treat the iron and steel products to be cleaned with a treatment solution containing 150Kg of an environmentally friendly rust-removing and phosphating agent per ton of solution. The treatment methods include soaking, brushing and spraying. The treatment temperature is 30°C and the...

Embodiment 3

[0147] The chemical composition of a kind of environment-friendly rust-removing phosphating agent is made up of following mass percentage:

[0148] Phosphoric acid: 35%;

[0149] Potassium dihydrogen phosphate: 10%;

[0150] Potassium nitrate: 10%;

[0151] Cetylamine: 0.1%;

[0152] Herotropine: 0.1%;

[0153] Sodium secondary alkyl sulfonate: 0.5%;

[0154] Block polyether L61: 0.5%;

[0155] Block polyether F38: 0.5%;

[0156] Water: 43.3%.

[0157] The application method of the above-mentioned environment-friendly rust-removing and phosphating agent in the rust-removing and phosphating of iron and steel surfaces is as follows:

[0158] Treat the iron and steel products to be cleaned with a treatment solution containing 150Kg of an environmentally friendly rust-removing and phosphating agent per ton of solution. The treatment methods include soaking, brushing and spraying. The treatment temperature is 10°C and the treatment time is 40 minutes.

[0159] After testing, ...

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Abstract

The invention aims at solving the problems that a phosphating film formed by an existing environment-friendly rust removal phosphating agent is loose and is not uniform, provides an environment-friendly rust removal phosphating agent and a preparing and using method thereof, and belongs to the technical field of dust removal and antisepsis. The environment-friendly rust removal phosphating agent comprises chemical components including, by mass percent, 35% to 55% of phosphoric acid, 3% to 10% of dihydric phosphate, 1% to 10% of nitrate, 0.2% to 2% of a compound corrosion inhibitor, 0.5% to 3% of a surface active agent and the balance water, wherein the total amount of the components is 100%. The phosphating agent is friendly to environment, the rust removal phosphating is thorough, the phosphating film has porosity and uniformity, the attaching force of a coating and a bottom material is enhanced, the corrosion resistance to the steel is improved, and the agent is suitable for being applied to steel surface dust removal phosphating.

Description

technical field [0001] The invention belongs to the technical field of rust removal and anticorrosion, and in particular relates to an environment-friendly rust removal and phosphating agent and its preparation and use method. Background technique [0002] Before the steel surface is formed, rolled, painted and sprayed, the steel surface must be derusted and phosphating. The purpose is to increase the lubricity of the steel surface, and at the same time improve the rust resistance and adhesion of the steel surface. It is the key to ensure the quality of subsequent processes. Therefore, the rust-removing phosphating agent is mainly used in the rust-removing and phosphating treatment of steel surfaces, and can be used in the pre-treatment rust-removing, rust-proofing and phosphating process sections of steel profiles, steam plates, wire pipes and other production lines. At present, rust removal and phosphating agents mainly have problems such as complex process formula, unsui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23C22/08
Inventor 王洪珂李治辉徐红波尚雪薇陈雷
Owner ANSHAN FALAN STEEL STRIP CO LTD
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