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Process for surface coating of ferrous metal

A technology of ferrous metal and surface coating, which is applied to the new surface of wear resistance and corrosion resistance, and the process field of treating ferrous metal surface with multi-element alloy coating, which can solve the problems affecting corrosion resistance and achieve extended service life Improvement of service life, wear resistance and corrosion resistance, uniform coating effect

Inactive Publication Date: 2010-05-26
浙江云翼标准件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once damaged, ferrous metal workpieces will naturally affect corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1. Put the ferrous metal workpiece into the mixed solution composed of sodium hydroxide, trisodium phosphate and sodium carbonate to chemically degrease. 3 minutes.

[0014] 2. After degreasing, wash with water to wash off the residual compound on the surface of the ferrous metal workpiece after degreasing, until it is cleaned.

[0015] 3. Immerse the ferrous metal workpiece in the multi-element alloy A solution composed of chromic anhydride, sulfuric acid, rare earth additives and trivalent chromium. The concentrations of the four substances are 130g / l, 0.5g / l, 1.5g / l, 1g / l respectively . The temperature of the multi-element alloy A solution was kept at 50°C, and after 2 minutes, the ferrous metal workpiece was removed, rinsed with clean water, and then dried at 100°C to obtain a coating with good adhesion.

[0016] 4. After the ferrous metal workpiece is completely cooled, immerse in the multi-element alloy B solution for 3 minutes. The multi-element alloy B solutio...

Embodiment 2

[0019] 1. Put the ferrous metal workpiece into the mixed solution composed of sodium hydroxide, trisodium phosphate and sodium carbonate to chemically degrease. 2 minutes.

[0020] 2. After degreasing, wash with water to wash off the residual compound on the surface of the ferrous metal workpiece after degreasing, until it is cleaned.

[0021] 3. Immerse the ferrous metal workpiece in the multi-component alloy A solution composed of chromic anhydride, sulfuric acid, rare earth additives and trivalent chromium. The concentrations of the four substances are 150g / l, 0.8g / l, 2g / l, and 2g / l respectively. The temperature of the multi-component alloy A solution was kept at 55°C, and after 2 minutes, the ferrous metal workpiece was removed, rinsed with clean water, and then dried at 100°C to obtain a coating with good adhesion.

[0022] 4. After the ferrous metal workpiece is completely cooled, immerse it in the multi-element alloy B solution for 3 minutes. The multi-element alloy B ...

Embodiment 3

[0025] 1. Put the ferrous metal workpiece into the mixed solution composed of sodium hydroxide, trisodium phosphate and sodium carbonate to chemically degrease. 2 minutes.

[0026] 2. After degreasing, wash with water to wash off the residual compound on the surface of the ferrous metal workpiece after degreasing, until it is cleaned.

[0027] 3. Immerse the ferrous metal workpiece in the multi-component alloy A solution composed of chromic anhydride, sulfuric acid, rare earth additives and trivalent chromium. The concentrations of the four substances are 140g / l, 0.6g / l, 1.7g / l, 1.5g / l, respectively. l. The temperature of the multi-element alloy A solution was kept at 53°C. After 2 minutes, the ferrous metal workpiece was removed, rinsed with clean water, and then dried at 100°C to obtain a coating with good adhesion.

[0028] 4. After the ferrous metal workpiece is completely cooled, immerse in the multi-element alloy B solution for 3 minutes. The multi-element alloy B solu...

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Abstract

The invention discloses a process for surface coating of a ferrous metal, which comprises the following steps of: firstly, performing chemical oil removal on a workpiece by using mixed solution; secondly, cleaning and removing the residual compounds after the oil removal on the surface of the workpiece with water; thirdly, immerging the workpiece into solution of a multi-component alloy A, wherein the temperature of the solution is between 50 and 55 DEG C; taking the workpiece out, cleaning the workpiece with clear water; drying the workpiece at the temperature of 100 DEG C; completely cooling the ferrous metal workpiece, and then immerging the workpiece into solution of a multi-component alloy B for 3 minutes; centrifugally drying the workpiece, and then baking the workpiece at the temperature of 300 DEG C for 1 hour; and completely cooling the ferrous metal workpiece to obtain a wear resistant and corrosion resistant multi-component alloy surface coating on the surface of the workpiece. The process has strong covering capacity, the coating is even, smooth and delicate, the color is silver gray, the wear resistance and the corrosion resistance of the processed ferrous metal workpiece are greatly improved, and the service life of the ferrous metal workpiece is prolonged.

Description

technical field [0001] The invention relates to a metal surface coating treatment process, in particular to a process for treating the ferrous metal surface with a multi-element alloy coating, so as to obtain a new surface resistant to wear and corrosion. Background technique [0002] In the field of industrial technology, we require ferrous metal workpieces to be corrosion-resistant, and surface treatment methods such as electro-galvanizing, Dacromet, and hot-dip galvanizing are usually performed on ferrous metal workpieces. But for these surface treatments, there is a common disadvantage, that is, they cannot withstand repeated installations caused by design or construction errors. Although these surface treatments have certain corrosion resistance, they do not have wear resistance. After some ferrous metal workpieces are installed once, the surface coating will be completely destroyed. Once damaged, ferrous metal workpieces will naturally affect corrosion resistance. ...

Claims

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Application Information

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IPC IPC(8): C23C22/32
Inventor 洪亮洪利江马华全洪银炎汪江一王伟祥胡兆华
Owner 浙江云翼标准件有限公司