Electrogalvanized steel plate and steel plate electrogalvanizing process

A technology of electro-galvanizing and steel plate, applied in the field of electro-galvanized steel plate and steel plate galvanizing process, can solve the problem of low hardness of galvanized layer, achieve the effect of changing the organizational structure, improving hardness, and increasing the hardness of the coating

Inactive Publication Date: 2007-01-03
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The hardness of its galvanized layer is still low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Table 1 shows the implementation effects of several embodiments of the steel sheet galvanizing process of the present invention and the comparison with the comparative examples. The sample original plates in the examples and comparative examples are cold-rolled low-carbon steel plates after annealing treatment.

[0017] Before electrogalvanizing, the steel plates are degreased and rinsed with water, and then pickled at room temperature. The pickling solution is 50g / L sulfuric acid, and the pickling time is 3 seconds. After pickling, rinse with water. . Then enter the electrogalvanizing step, the electrogalvanizing process conditions of several embodiments are as follows:

[0018] Plating solution composition: ZnSO 4 ·7H 2 O(500g / L), H 2 SO 4 (15g / L), Sn 2+ (the concrete addition amount of each embodiment sees Table 1);

[0019] Plating solution temperature: 50°C;

[0020] Cathode current density during electroplating: 90A / dm 2 ;

[0021] Flow velocity of elect...

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Abstract

The present invention is electrogalvanized steel plate and steel plate electrogalvanizing process. The electrogalvanized steel plate has electrogalvanized layer containing tin in 15-8000 ppm. The steel plate electrogalvanizing process includes the steps of defatting the steel plate, pickling treatment and electrogalvanizing, and features the electrogalvanizing solution containing Sn2+ in 1-500 ppm. Adding small amount of Sn2+ into the electrogalvanizing solution can alter the structure of the electrogalvanized layer and electrogalvanized layer containing tin in 15-8000 ppm has greatly raised, 2 times or higher raised, hardness.

Description

technical field [0001] The invention relates to a steel material and an electroplating process, in particular to an electro-galvanized steel plate and a steel plate galvanizing process. Background technique [0002] Electro-galvanized steel sheets are widely used in household appliances, automobiles and construction materials. As far as household appliances and automobiles, especially cars, have high requirements on the quality of materials, they are required to have high surface quality, high corrosion resistance, and good formability. Electrogalvanized steel sheets can better meet their requirements for material surface quality and corrosion resistance. However, the existing electrogalvanized steel sheets still have deficiencies, mainly due to the problems of the electroplating process, which makes the galvanized layer soft and difficult to form. Performance is poor. [0003] Some literature proposes to improve the quality of electrogalvanized steel sheets by adding addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22C25D3/56
Inventor 温乃盟丁志强
Owner BAOSHAN IRON & STEEL CO LTD
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