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Environmental-friendly chrome-free phosphating electrogalvanized sealed steel sheet and manufacturing method thereof

A manufacturing method, electro-galvanizing technology, applied in the direction of chemical instruments and methods, superimposed layer plating, coating, etc., can solve the problems of corrosion resistance and paintability without specific instructions, achieve excellent paintability, avoid Effect of health damage, excellent corrosion resistance

Active Publication Date: 2009-09-02
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese Patent Publication CN1043962 discloses a passivation solution for treating steel surfaces, which is characterized in that phosphoric acid, tartaric acid, N, N-dimethylamide, benzene It is formed by reacting triazole, polyethylene glycol, and water at normal temperature and pressure. The passivation solution does not contain chromium salts, heavy metal salts, and nitroso groups, but this publication only mentions that it is suitable for ordinary steel workpieces. , and there is no specific description on its corrosion resistance and paintability

Method used

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  • Environmental-friendly chrome-free phosphating electrogalvanized sealed steel sheet and manufacturing method thereof
  • Environmental-friendly chrome-free phosphating electrogalvanized sealed steel sheet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Test sample

[0041] Products sold in the market: plate thickness 0.6mm, double-sided electro-galvanized steel plate, and the amount of galvanizing on each side is 20g / m 2 .

[0042] 2. Cleaning of electro-galvanized steel sheets

[0043] Clean the surface of the electro-galvanized steel sheet with an aqueous solution (concentration: 20g / L) of a medium-alkaline degreasing agent (registered trademark: FC-364S, product of Japan Parker Seisei Co., Ltd.), the treatment temperature is 60°C, and the treatment time is 20 seconds , the treatment method is spraying, and then washing with tap water to remove the residual alkaline components on the surface.

[0044] 3. Phosphating treatment

[0045] (1) The electrogalvanized steel sheet that the surface has been cleaned is first dipped for 20 seconds in the surface adjustment treatment solution (PL-Z, the product of Japan Parker Seisei Co., Ltd.) diluted to 0.6g / L with water, wherein the surface adjustment treatment solution...

Embodiment 2

[0051] 1. The test sample is the same as in Example 1.

[0052] 2. The cleaning of the electrogalvanized steel sheet is the same as in Example 1.

[0053] 3. In the phosphating treatment, the concentration of the surface adjustment treatment liquid is 2.0 g / L, and the steel plate is sprayed in the phosphating treatment agent for 20 seconds.

[0054] 4. See Table 1 for the composition of the sealing treatment agent and the weight of the sealing layer, and see Table 1 for other implementation methods.

Embodiment 3

[0056] 1. The test sample is the same as in Example 1.

[0057] 2. The cleaning of the electrogalvanized steel sheet is the same as in Example 1.

[0058] 3. In the phosphating treatment, the concentration of the surface adjustment treatment liquid is 0.8g / L. The steel plate is sprayed in the phosphating treatment agent for 10 seconds. The weight of the phosphating layer is shown in Table 1.

[0059] 4. See Table 1 for the composition of the sealing treatment agent and the weight of the sealing layer, and see Table 1 for other implementation methods.

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Abstract

The invention provides an environmental-friendly chrome-free phosphating electrogalvanized sealed steel sheet and a manufacturing method thereof. The steel sheet comprises a base plate, a zinc coating, a phosphating coating and a sealed coating. An electrogalvanized steel sheet is adopted as the base material, the phosphating coating which is taken as a low-layer coating is formed on the surface of the base material, then a chrome-free sealing finishing agent is adopted to coat the surface of the phosphating coating so as to form an upper-layer coating, and finally the environmental-friendly chrome-free phosphating electrogalvanized sealed steel sheet with excellent corrosion resistance and coating adhesive property is obtained after drying, thereby solving the problems in environmental friendliness and property caused by the traditional Cr <6+> sealing treatment.

Description

technical field [0001] The invention relates to the surface treatment technology of cold-rolled steel sheets, in particular to an environment-friendly electro-galvanized chromium-free phosphating closed steel sheet and a manufacturing method thereof. Background technique [0002] Corrosion of steel materials occurs every moment, and about 10% of steel is wasted due to corrosion every year. In order to prevent corrosion and prolong the service life of steel materials, the most common measures adopted are surface coating, phosphating, passivation, painting, etc. [0003] Electro-galvanizing is an effective method to improve the corrosion resistance of cold-rolled steel sheets, but the paintability and processability of the untreated galvanized surface are poor. In order to improve the coating and processability of electro-galvanized steel sheets, phosphating treatment to form a phosphating film is often carried out on the surface of electro-galvanized steel sheets. Corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07C25D5/48C23C28/02B32B15/04
Inventor 倪富荣吴志良孙宁锋姚勇
Owner BAOSHAN IRON & STEEL CO LTD
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