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Pulse electroplating method for alkaline zinc-nickel alloy with stable nickel content

A zinc-nickel alloy and pulse electroplating technology, which is applied in the field of electroplating zinc-nickel alloy, can solve the problems of fine grain size and unstable nickel content, and achieve the effects of good bonding force, excellent corrosion resistance and low porosity

Inactive Publication Date: 2013-12-18
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of unstable nickel content in the coating, and at the same time achieve grain refinement, reduce the stress of the coating, and improve the corrosion resistance of the coating

Method used

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  • Pulse electroplating method for alkaline zinc-nickel alloy with stable nickel content
  • Pulse electroplating method for alkaline zinc-nickel alloy with stable nickel content
  • Pulse electroplating method for alkaline zinc-nickel alloy with stable nickel content

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of alkaline zinc-nickel alloy plating solution: First, weigh 10g of zinc oxide, 80g of sodium hydroxide, 15g of nickel sulfate hexahydrate, 15ml of ethylenediamine, 10ml of tetraethylenepentamine, 30g of potassium sodium tartrate, and 10g of lemon sodium nitrate, 40ml triethanolamine, 1.5 ml nonionic surfactant, 0.5 g vanillin. Stir the weighed sodium hydroxide and zinc oxide evenly, add 1 / 5 of the total volume of the plating solution in distilled water to dissolve, and stir to dissolve until the solution is clear and transparent, then dilute to 1 / 3 of the total volume, this solution is 1 No. solution; then dissolve the weighed nickel sulfate hexahydrate, potassium sodium tartrate, and sodium citrate respectively, then mix and stir thoroughly, then add the weighed ethylenediamine, tetraethylenepentamine and triethanolamine, stir and mix Evenly, this solution is No. 2 solution. Finally, slowly add No. 2 solution into No. 1 solution, stir while adding, the...

Embodiment 2

[0041] (1) Preparation of alkaline zinc-nickel alloy plating solution: First, weigh 10g of zinc oxide, 80g of sodium hydroxide, 15g of nickel sulfate hexahydrate, 15ml of ethylenediamine, 10ml of tetraethylenepentamine, 30g of potassium sodium tartrate, and 10g of lemon sodium nitrite, 40ml triethanolamine, 1.5 ml nonionic surfactant, 0.5 g vanillin. Stir the weighed sodium hydroxide and zinc oxide evenly, add 1 / 5 of the total volume of the plating solution in distilled water to dissolve, and stir to dissolve until the solution is clear and transparent, then dilute to 1 / 3 of the total volume, this solution is 1 No. solution; then dissolve the weighed nickel sulfate hexahydrate, potassium sodium tartrate, and sodium citrate respectively, then mix and stir thoroughly, then add the weighed ethylenediamine, tetraethylenepentamine and triethanolamine, stir and mix Evenly, this solution is No. 2 solution. Finally, slowly add No. 2 solution into No. 1 solution, stir while adding, the...

Embodiment 3

[0046] (1) Preparation of alkaline zinc-nickel alloy plating solution: First, weigh 10g of zinc oxide, 80g of sodium hydroxide, 15g of nickel sulfate hexahydrate, 15ml of ethylenediamine, 10ml of tetraethylenepentamine, 30g of potassium sodium tartrate, and 10g of lemon sodium nitrate, 40ml triethanolamine, 1.5 ml nonionic surfactant, 0.5 g vanillin. Stir the weighed sodium hydroxide and zinc oxide evenly, add 1 / 5 of the total volume of the plating solution in distilled water to dissolve, and stir to dissolve until the solution is clear and transparent, then dilute to 1 / 3 of the total volume, this solution is 1 No. solution; then dissolve the weighed nickel sulfate hexahydrate, potassium sodium tartrate, and sodium citrate respectively, then mix and stir thoroughly, then add the weighed ethylenediamine, tetraethylenepentamine and triethanolamine, stir and mix Evenly, this solution is No. 2 solution. Finally, slowly add No. 2 solution into No. 1 solution, stir while adding, the...

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Abstract

The invention belongs to the technical field of electroplated zinc-nickel alloys and particularly relates to a pulse electroplating method for a zinc-nickel alloy with stable nickel content. The pulse electroplating method for the alkaline zinc-nickel alloy with the stable nickel content provided by the invention comprises the following steps: (1) preparing an alkaline zinc-nickel alloy electroplating solution; (2) pre-treating a base body; (3) carrying out pulse alkaline zinc-nickel alloy electroplating; and (4) recycling wastewater and washing a plated layer. Compared with a direct-current electroplated method for the zinc-nickel alloy, the pulse electroplating method has the characteristics that the plated layer has fine crystals, nickel content is stable, stress and porosity are low, corrosion resistance is excellent and the like, so as to realize the real alloy electroplating.

Description

technical field [0001] The invention belongs to the technical field of zinc-nickel alloy electroplating, and in particular relates to a zinc-nickel alloy pulse electroplating method with stable nickel content. Background technique [0002] Electroplating zinc-nickel alloy is an anode-type protective coating on steel substrates that emerged in the 1980s. It usually refers to low-nickel-content alloys with a nickel content of less than 20%. Such alloy coatings not only have corrosion resistance 7-10 times higher than galvanized coatings, but also have low hydrogen embrittlement, good paintability, weldability and Formability, so it is widely used in steel protection such as automobiles, aerospace, light industry, and home appliances. As far as automotive components using zinc-nickel alloy plating are concerned, they have been standardized in the design drawings of some European and American countries, and their application range is wider in Japan. However, our country starte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/18
Inventor 王玥郭晓斐孙焕喜陈伟强张龙龙张志芳
Owner SHANDONG JIANZHU UNIV
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