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Treatment process of stainless steel cold-rolled sheet

A treatment process, cold-rolled plate technology, applied in the field of metal plate treatment process, can solve the problems of uneven color, low added value, rough plate surface, etc., to achieve uniform color, improved apparent quality, and low processing cost low effect

Inactive Publication Date: 2010-07-14
江门市福斯特金属表面处理技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cold-rolled stainless steel plate produced by this process has uneven color on the surface of the plate and weak corrosion resistance. In addition, the surface of the plate is relatively rough and the added value is not high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Stainless steel model: 201 series

[0039] 1) Remove the dirt on the stainless steel cold-rolled plate;

[0040] 2) Put the clean stainless steel cold-rolled plate into the electrolytic passivation solution. The electrolytic passivation solution contains citric acid with a mass percentage of 5%. The stainless steel cold-rolled plate is used as the anode and the titanium is used as the cathode. DC pulse electricity lasts for 20s to form an oxide protective film on the stainless steel cold-rolled plate;

[0041] 3) Soak the stainless steel cold-rolled plate with the oxide protective film in the passivation sealing solution at 40°C for 30s. The passivation sealing solution contains 4% sodium gluconate and 5% furoic acid Sodium, and use potassium sorbate to adjust the pH of the passivation blocking solution to 8;

[0042] 4) The closed and passivated stainless steel cold-rolled plate is cleaned and dried to obtain the finished product.

Embodiment 2

[0044] Stainless steel model: 316 series

[0045] 1) Remove the dirt on the stainless steel cold-rolled plate;

[0046] 2) Put the clean stainless steel cold-rolled plate into the electrolytic passivation solution. The electrolytic passivation solution contains citric acid with a mass percentage of 10%. The stainless steel cold-rolled plate is used as the anode and the titanium is used as the cathode. The DC pulse electricity lasts for 30s to form an oxide protective film on the stainless steel cold-rolled plate;

[0047] 3) Soak the stainless steel cold-rolled plate with the oxide protective film in the passivation sealing solution at 30°C for 40s. The passivation sealing solution contains 5% sodium gluconate and 3% furoic acid Sodium, and use potassium sorbate to adjust the pH of the passivation blocking solution to 7.5;

[0048] 4) The closed and passivated stainless steel cold-rolled plate is cleaned and dried to obtain the finished product.

Embodiment 3

[0050] Stainless Steel Model: 430 Series

[0051] 1) Remove the dirt on the stainless steel cold-rolled plate;

[0052] 2) Put the clean stainless steel cold-rolled plate into the electrolytic passivation solution. The electrolytic passivation solution contains citric acid with a mass percentage of 8%. The stainless steel cold-rolled plate is used as the anode and the titanium is used as the cathode. The DC pulse electricity lasts for 25s to form an oxide protective film on the stainless steel cold-rolled plate;

[0053] 3) Soak the stainless steel cold-rolled plate with the oxide protective film in the passivation sealing solution at 50°C for 10s. The passivation sealing solution contains 3% sodium gluconate and 4% furoic acid Sodium, and use potassium sorbate to adjust the pH of the passivation blocking solution to 8;

[0054] 4) The closed and passivated stainless steel cold-rolled plate is cleaned and dried to obtain the finished product.

[0055] In the method of the p...

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PUM

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Abstract

The invention discloses a treatment process of a stainless steel cold-rolled sheet, which comprises the following steps: firstly, cleaning the stainless steel cold-rolled sheet, and then, putting the clean stainless steel cold-rolled sheet into an electrolytic passivation solution containing citric acid; introducing direct current pulse electricity of 6-12V for carrying out electrolytic passivation treatment to form an oxide protecting film on the stainless steel cold-rolled sheet; then, putting the stainless steel cold-rolled sheet on which the oxide protecting film is formed into a passivating and sealing solution for soaking, sealing and passivating; and finally, cleaning and drying the stainless steel cold-rolled sheet to obtain a finished product. The stainless steel cold-rolled sheet treated by the process of the invention has a smooth sheet surface and uniform color, the surface quality is greatly improved, and the corrosion resistance of a panel is also greatly improved. The process of the invention has low treatment cost and low requirements on equipment, and is very suitable for medium and small stainless steel cold rolling plants to improve the quality and the additional value of products.

Description

technical field [0001] The invention relates to a processing technology for metal plates, in particular to a processing technology for stainless steel cold-rolled plates. Background technique [0002] Since the production process of stainless steel cold-rolled sheets is not heated, there are no defects such as pits and scales that often occur in hot rolling, and the surface quality is good and the finish is high. Moreover, the dimensional accuracy of cold-rolled products is high, and the performance and structure of the products can meet some special requirements for use, such as electromagnetic properties and deep drawing properties. [0003] Cold-rolled strips are widely used, such as automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, food cans, etc. [0004] China is currently the largest consumer and producer of stainless steel in the world. According to statistics from the China Stainless Steel Market Network of the Economic ...

Claims

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Application Information

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IPC IPC(8): C25D11/34
Inventor 梁伟平
Owner 江门市福斯特金属表面处理技术发展有限公司