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Anti-rust treatment process for steel surface

A technology for anti-rust treatment and steel surface, which is applied in the coating process of metal materials, etc., can solve the problems of unqualified salt spray test of workpieces, high bath update frequency, and restrictions on popularization and application, and achieve clean production and low production costs , The process is stable and reliable

Inactive Publication Date: 2014-12-24
无锡杨市表面处理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most zirconium-based treatment agents have strict requirements on the material and water quality of the workpiece, and there is rust phenomenon in the treatment of some cold-rolled plates, which makes the salt spray test of the workpiece fail to meet the standard, and the service life of the bath is short, making the bath The update frequency is high, resulting in an increase in process cost, so its popularization and application are limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A steel surface antirust treatment process, the composition of the treatment liquid used in the process is: potassium silicate 6g / L, sodium silicate 15g / L, sodium nitrate 22g / L, zinc nitrate 11g / L, zinc oxide 14g / L , sulfuric acid 22ml / L, hydrogen peroxide 23mL / L, triethanolamine 1.2g / L, and the rest is water. The treatment process is as follows: first, the iron and steel parts are mechanically derusted, then rinsed with clean water, and then degreased with alkali washing liquid , then rinse with clean water, then soak in the treatment solution with the above components, keep the temperature of the treatment solution at 25°C, pH to 3.0, and the treatment time is 30 minutes, then rinse with clean water, and finally blow dry.

Embodiment 2

[0014] A steel surface antirust treatment process, the composition of the treatment liquid used in the process is: potassium silicate 10g / L, sodium silicate 11g / L, sodium nitrate 24g / L, zinc nitrate 7g / L, zinc oxide 18g / L , sulfuric acid 18ml / L, hydrogen peroxide 27mL / L, triethanolamine 0.8g / L, and the rest is water. The treatment process is as follows: first, the iron and steel parts are mechanically derusted, then rinsed with clean water, and then degreased with alkali washing liquid , then rinse with clean water, then soak in the treatment solution with the above components, keep the temperature of the treatment solution at 45°C, pH to 2.0, and the treatment time is 60 minutes, then rinse with clean water, and finally blow dry.

Embodiment 3

[0016] A steel surface antirust treatment process, the composition of the treatment liquid used in the process is: potassium silicate 8g / L, sodium silicate 13g / L, sodium nitrate 23g / L, zinc nitrate 9g / L, zinc oxide 16g / L , sulfuric acid 20ml / L, hydrogen peroxide 25mL / L, triethanolamine 1.0g / L, and the rest is water. The treatment process is as follows: first, the iron and steel parts are mechanically derusted, then rinsed with clean water, and then degreased with alkali washing liquid , then rinse with clean water, and then soak in the treatment solution with the above components, keep the temperature of the treatment solution at 35°C, pH to 2.5, and the treatment time is 45 minutes, then rinse with clean water, and finally blow dry.

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PUM

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Abstract

The invention discloses an anti-rust treatment process for a steel surface. A treatment fluid adopted by the anti-rust treatment process comprises the following components by weight: 6-10 g / L of potassium silicate, 11-15 g / L of sodium silicate, 22-24 g / L of sodium nitrate, 7-11 g / L of zinc nitrate, 14-18 g / L of zinc oxide, 18-22 ml / L of sulfuric acid, 23-27 mL / L of hydrogen peroxide, 0.8-1.2 g / L of triethanolamine and the balance of water. The anti-rust treatment process comprises the following steps of: firstly mechanically derusting a steel part; then washing by using clear water; then deoiling by using alkali wash water; then washing by using clear water; then soaking into the treatment fluid which comprises the components for 30-60 minutes while keeping the treatment fluid at the temperature of 25-45 DEG C and the pH at 2.0-3.0; then washing by using clear water; finally blow-drying.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a steel surface antirust treatment process. Background technique [0002] Traditionally, most conversion coating treatment solutions contain chromate or phosphate, although satisfactory results can be obtained, but with the increasing awareness of environmental protection and the continuous maturity of the application of conversion coating technology in the world, the traditional industrial technology Will be gradually replaced by environmentally friendly conversion film technology. [0003] Coating is an anti-corrosion method widely used in metal surface treatment. Pre-painting treatment is an essential pre-painting process. Its function is to establish a non-metallic protective layer on the protected metal workpiece, so that the metal workpiece has good adhesion to the paint film, so that both Stronger adhesion, thus improving the corrosion resistance of the coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/50
Inventor 潘增炎
Owner 无锡杨市表面处理科技有限公司
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