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

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...