Method for acquiring complexing agent special for zinc-nickel alloy plating

A zinc-nickel alloy and complexing agent technology, which is applied in the field of obtaining a special complexing agent for zinc-nickel alloy electroplating, can solve the problems of a large variation range of nickel content, poor deep plating ability of a plating solution, unfavorable industrialized production, and the like, so as to improve the deep plating capacity, lower production costs, and the effect of broadening the operating range

Active Publication Date: 2008-12-03
杭州东方表面技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After research, it is found that the complexing agents selected in the existing alkaline process are almost all single or simple combination of organic amines. Although zinc-nickel alloy coatings can also be obtained, there is a large range of nickel content in the coating. The disadvantages such as poor deep plating ability of the plating solution are not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Fix the cleaned 500ml three-neck flask on the workbench equipped with a stirring device, install a water bath device for cooling at the bottom of the flask, and install a thermometer. Add 150ml of deionized water to the flask, and slowly add 72g of diethylenetriamine from the feeding port under stirring, and control the temperature at 15-40°C; after adding diethylenetriamine, slowly add 70g of diethylenetriamine under stirring For epichlorohydrin, the temperature is controlled at 60-70°C. After the reaction is completed, the flask is immediately taken off for cooling, and the reaction product is poured into a storage bottle as a nickel complexing agent for subsequent use. In the complexing agent preparation process, the above two steps are exothermic reactions, and a good cooling system is indispensable. The product obtained after the reaction can be used as a complexing agent for electroplating zinc-nickel alloy.

[0018] Application: Prepare the following electropla...

Embodiment 2

[0029] Fix the cleaned 500ml three-neck flask on the workbench equipped with a stirring device, install a water bath device for cooling at the bottom of the flask, and install a thermometer. Add 150ml of deionized water to the flask, and slowly add 100g of tetraethylenepentamine and 30g of diethylenetriamine from the feeding port under stirring, and control the temperature at 15-40°C; Add 70g of epichlorohydrin and control the temperature at 60-70°C. After the reaction is completed, the flask is immediately taken off for cooling, and the reaction product is poured into a storage bottle as a nickel complexing agent for subsequent use.

[0030] Prepare the following plating solutions:

[0031] Zinc ion 8g / L

[0032] Nickel ion 2g / L

[0033] Sodium hydroxide 125g / L

[0034] Complexing agent 60ml / L

[0035] Additive ZN-1A 16ml / L

[0036] Brightener ZN-1B 2ml / L

[0037] Take 250ml of the above solution in a Hull cell, use a pure zinc block as the anode, and use a 6.5×10cm ir...

Embodiment 3

[0039] Example 3: The difference from Example 1 is that 90g of ethylenediamine is slowly added from the feeding port under stirring, and the temperature is controlled at 15-40°C; Add 70g of epichlorohydrin and control the temperature at 60-70°C.

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PUM

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Abstract

The invention relates to a method for extracting complexing agent special for zinc nickel alloy plating, which has the steps as follows: (1) deionized water of 150ml is injected into a reaction vessel provided with a warming device and an agitating device and is heated until the temperature reaches 15 DEG C to 40 DEG C, and then organic-amine simple complexing agent (the quantity of which is 50g to 150g) or alkanolamine simple complexing (the quantity of which is 50g to 150g) is added by inches; (2) propylene oxide whose quantity is 50g to 100g or epoxy chloropropane whose quantity is 50g to 100g is added into the dissolved complexing agent solution in the temperature of 60 DEG C to 70 DEG C, and the production which is obtained after the reaction can be used as the complexing agent for plating zinc nickel alloy. The method has the beneficial effects that: (1) The quality fraction of nickel in the alloy cladding layer can be controlled in a less range (7 to 14 percent in general), and better maneuverability is realized; (2) by using the complexing agent, the deepening plating ability of the plating solution is greatly enhanced in a higher operating temperature, the operation range of the technology is widened and the production cost is reduced; the method is provided with real popularizing signification in the circumstance that the power source is increasingly strained and the energy conservation and carbon emission reduction are advocated at present.

Description

technical field [0001] The invention relates to the field of zinc-nickel alloy electroplating in an alkaline zincate system using NaOH and ZnO as main raw materials, and mainly relates to a method for obtaining a special complexing agent for zinc-nickel alloy electroplating. Background technique [0002] Due to its high corrosion resistance, low hydrogen embrittlement, excellent weldability and reworkability, zinc-nickel alloys have been widely used in automobiles, machinery manufacturing and other industries. Electroplating zinc-nickel alloy plating solutions are mainly divided into two types: weak acidic system and alkaline zincate system. The main advantages of the weak acidic zinc-nickel electroplating process are its high current efficiency, fast deposition rate, low hydrogen embrittlement, and relatively simple sewage treatment. , It is easy to obtain alloy coatings with high nickel content, but there are many disadvantages. The dispersion ability of the plating soluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
Inventor 曾鑫张光前
Owner 杭州东方表面技术有限公司
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