Bright corrosion resisting zinc-iron alloy plating process

A zinc-iron alloy and electroplating process technology, which is applied in the field of bright and corrosion-resistant zinc-iron alloy electroplating with alkaline plating solution, can solve the problems of rough coating, low deposition rate, and low equipment pollution, and achieve fine and bright coating, good dispersion ability, and less inclusion effect
CN101545125AInactive Publication Date: 2009-09-30SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2009-09-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a bright corrosion resisting zinc-iron alloy plating process which comprises the step of adding complexing agent and ferrous ion to zincate zincification solution. Zinc-iron alloy plating bath comprises 6-12g / L of ZnO, 90-150 g / L of NaOH, 20-50 mL / L of trolamine, 5-13g / L of FeSO4.7H2O, 2-8mL / L of DE, 0.5-1g / L of ethylenediamine tetracetic acid, 0.02-0.1 g / L of vanillina, 0.02-0.1 g / L of dodecyl sodium sulfate and 1-2 g / L of Zn powder. The process can reach the cathode current efficiency of 90 percent, is easy to control the alloy component and can obtain bright zinc-iron alloy plating containing 17-20 percent of iron; in addition, electrochemistry and salt-spray fog corrosion results show that the bright zinc-iron alloy plating has better corrosion resistance than pure zinc plating chromating, and the bright zinc-iron alloy plating has better protection property and decoration performance.
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Description

technical field

[0001] The invention relates to a metal surface electroplating zinc alloy process, in particular to an alkaline plating solution electroplating bright corrosion-resistant zinc-iron alloy process. Background technique

[0002] As one of the effective steel surface protection processes, galvanizing has been widely used in the protection of steel components, accounting for about 1 / 3 to 1 / 2 of the entire electroplating industry. However, with the development of science and technology, the requirements for the use of coatings are getting higher and higher. On the basis of galvanizing, zinc-based alloy coatings and zinc-based composite coatings have been developed. Zinc-based alloy coatings include Zn-Ni, Zn-Fe, Zn-Co, Zn-Cu, Zn-Mn, etc. Among them, the zinc-iron alloy coating has been studied and applied most because of the wide source of iron and low cost.

[0003] Zinc-iron alloy coatings are divided into low-iron zinc-iron alloy coatings and high-iron zinc-ir...

Claims

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