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A kind of environment-friendly rust-removing phosphating agent and its preparation and use method

A kind of derusting and phosphating agent, an environmentally friendly technology, applied in the coating process of metal materials, etc., can solve problems such as unevenness and loose phosphating film, achieve enhanced adhesion, prevent over-corrosion and hydrogen embrittlement, and uniform film formation Effect

Active Publication Date: 2019-10-18
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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  • A kind of environment-friendly rust-removing phosphating agent and its preparation and use method
  • A kind of environment-friendly rust-removing phosphating agent and its preparation and use method
  • A kind of environment-friendly rust-removing phosphating agent and its preparation and use method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0038] An environmentally friendly rust removing and phosphating agent whose chemical composition is composed of the following mass percentages:

[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 the above environmentally friendly rust removing phosphating agent is specifically as follows:

[0049] Take the material according to the chemical composition ratio of the above-mentioned environmentally friendly derusting and phosphating agent, add nitrate, dihydrogen phosphate, compound corrosion inhibitor thiourea and cetylamine into water, stir at room temperature until completely dissolved, and then add phosphoric acid With the surface active agent sodium secondary alkyl sulfonate and block polyether F68, the environment-f...

Embodiment 2

[0054] An environmentally friendly rust removing and phosphating agent whose chemical composition is composed of the following mass percentages:

[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] Urotropine: 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 environmentally friendly rust removing and phosphating agent in the rust removing and phosphating of steel surface is as follows:

[0067] Treat the steel products to be cleaned with a treatment solution containing 150Kg of 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 treatment time is 15 minutes.

[0068] After t...

Embodiment 3

[0147] The chemical composition of an environmentally friendly rust removing and phosphating agent is composed of the following mass percentages:

[0148] Phosphoric acid: 35%;

[0149] Potassium dihydrogen phosphate: 10%;

[0150] Potassium nitrate: 10%;

[0151] Cetylamine: 0.1%;

[0152] Urotropine: 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 environmentally friendly rust removing and phosphating agent in the rust removing and phosphating of steel surface is as follows:

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

[0159] After testing, the above-mentioned derusting and phosphati...

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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 particularly relates to an environment-friendly rust removal and phosphating agent and a preparation and use method thereof. Background technique [0002] Before forming, rolling, painting and spraying the steel surface, the steel surface must be pretreated with rust removal and phosphating. The purpose is to increase the lubricity of the steel surface, while improving the rust resistance and adhesion of the steel surface. It is the key to ensuring the quality of subsequent procedures. Therefore, the rust removing and phosphating agent is mainly used in the rust removing and phosphating treatment of the steel surface, and can be used in the pretreatment rust removal, rust prevention, and phosphating process sections of the production lines of steel profiles, automotive plates, wire rods and pipes. At present, rust removal and phosphating agents mainly have problems such as ...

Claims

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Application Information

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