Alkaline cyanide-free electro-deposition zinc-nickel alloy additive and application thereof

A zinc-nickel alloy and additive technology, which is applied in the field of electroplating zinc-nickel alloy, can solve the problems of low current efficiency, poor coating quality, and poor stability, and achieve high current efficiency, improved coating performance, and high stability.

Active Publication Date: 2016-11-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Through the screening and addition of additives, the electroplating process of electrodeposited zinc-nickel alloy was optimized, and finally a zinc-nickel alloy coating with bright appearance, high hardness and good corrosion resistance was obtained. The ability is good, which fundamentally solves the problems of poor stability of conventional alkaline zinc-nickel alloy plating solution, low current efficiency, and poor quality of the obtained coating, and improves the feasibility of its industrial application

Method used

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  • Alkaline cyanide-free electro-deposition zinc-nickel alloy additive and application thereof
  • Alkaline cyanide-free electro-deposition zinc-nickel alloy additive and application thereof
  • Alkaline cyanide-free electro-deposition zinc-nickel alloy additive and application thereof

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specific Embodiment approach 1

[0015] Embodiment 1: The alkaline cyanide-free electrodeposited zinc-nickel alloy additive in this embodiment is formulated from additives and ultrapure water. The additives are organic additives or a mixture of inorganic additives and organic additives. The components of the additive The concentration is 0.1 ~ 50 g / L.

[0016] Alkaline cyanide-free electrodeposition zinc-nickel alloy operation is as follows:

[0017] 1. Preparation of alkaline cyanide-free electrodeposition zinc-nickel alloy additive:

[0018] Sequentially weigh the corresponding amount of organic additives or a mixture of inorganic additives and organic additives, prepare a clear solution with ultrapure water, and store at a constant volume.

[0019] 2. Alkaline cyanide-free electrodeposition zinc-nickel alloy plating solution preparation:

[0020] (1) Use hydantoin derivatives as the main complexing agent, weigh the main complexing agent 20 ~ 400 g / L, zinc sulfate: 5 ~ 200 g / L and mix to obtain a clear so...

specific Embodiment approach 2

[0032]Specific embodiment two: the difference between this embodiment and specific embodiment one is that the components and concentrations of the electrodeposited zinc-nickel alloy additives are: adenine 10 g / L, guanine 5 g / L, cinnamon acetic acid 10 g / L g / L, antimony trichloride 0.5 g / L, potassium tellurite 5 g / L, and the additive dosage is 5 mL / L. The obtained coating has a bright, uniform and smooth appearance. SEM observation shows that the coating crystal is fine, dense, and free of pores and cracks. , The corrosion resistance test found that the corrosion resistance has been significantly improved.

specific Embodiment approach 3

[0033] Specific embodiment three: the difference between this embodiment and specific embodiments one and two is that the components and concentrations of the electrodeposited zinc-nickel alloy additives are: polyacrylamide 20 g / L, 3-methylquinoline 10 g / L, gum arabic 5 g / L, selenium dioxide 2 g / L, sodium dodecyl sulfonate 1 g / L, and the additive dosage was 10 mL / L. The crystals are fine, dense, free of pores and cracks, and the corrosion resistance test shows that the corrosion resistance has been significantly improved.

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Abstract

The invention discloses an alkaline cyanide-free electro-deposition zinc-nickel alloy additive and an application thereof. The alkaline cyanide-free electro-deposition zinc-nickel alloy additive is prepared from an additive and ultrapure water. The additive is an organic additive or a mixture of the organic additive and an inorganic additive and can be applied to an alkaline cyanide-free electro-deposition zinc-nickel alloy plating solution to replace a traditional cadmium coating and cyanide electro-deposition zinc-nickel alloy process. According to the alkaline cyanide-free electro-deposition zinc-nickel alloy additive and the application thereof, through additive screening and adding, an electroplating process for electro-deposition zinc-nickel alloy is optimized, and a zinc-nickel alloy coating which is bright in appearance, high in hardness and excellent in corrosion resistance is finally obtained; the obtained plating solution is good in stability, dispersity and covering capacity, and the problems that a conventional alkaline zinc-nickel alloy plating solution is poor in stability and low in current efficiency, and an obtained coating is poor in quality are solved fundamentally; and the industrialized application feasibility of the alkaline cyanide-free electro-deposition zinc-nickel alloy additive is improved.

Description

technical field [0001] The invention belongs to the technical field of electroplating zinc-nickel alloys, and relates to an alkaline cyanide-free electrodeposition zinc-nickel alloy additive and its application in electrodeposition zinc-nickel alloys. Background technique [0002] According to the statistics of developed countries, the annual direct loss due to corrosion accounts for 1.5 to 4.2% of the gross national economic output, and the annual loss of steel due to corrosion in my country is as high as 6 million tons. Therefore, the development of corrosion-resistant coatings has great economic value. Cadmium coatings are widely used in marine vessels, avionics and other industries due to their good corrosion resistance and good mechanical properties. However, cadmium coatings are highly toxic and pose great harm to the human body and the environment. As an alternative to cadmium coatings, zinc and zinc alloys have gradually become a research hotspot for corrosion-resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
CPCC25D3/562C25D3/565
Inventor 安茂忠冯忠宝任丽丽
Owner HARBIN INST OF TECH
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