Composite complexing agent and chemical nickel-plating solution containing same

Abstract

The invention discloses a composite complexing agent and a chemical nickel-plating solution containing the same. In the invention, the composite complexing agent comprises the following components: 5-100g of adipic acid, 3-15g of tartaric acid, 4-15g of one or two of malic acid and citric acid and 5-6g of succinic acid or propionic acid. The invention solves the problem of short circulation cycleof a plating solution in the prior art, and meanwhile, the chemical nickel-plating solution does not contain 18 pollutants, such as lead, cadmium and the like to which high global attention is paid, therefore, the invention has the advantages that the work temperature is lower, the hardness is high and the corrosion-resistance performance is high, and the requirement on cleaning production is met.

Description

technical field [0001] The invention relates to the field of electroless nickel plating, in particular to a composite complexing agent and an electroless nickel plating solution containing the composite complexing agent. Background technique [0002] Electroless plating is a chemical treatment process that uses a suitable reducing agent to reduce the metal ions in the solution and deposit them on the surface of the catalytically activated plating. [0003] In recent years, as a surface treatment technology, electroless plating has been paid more and more attention in industry, and its application range covers various fields of industrial production. The continuous development of electroless nickel plating is attributed to the good manufacturability of the technology. The electroless nickel plating layer has unique physical, chemical and mechanical properties, and the process equipment is simple, easy to control and master, and the coating is uniform and flat, suitable for pa...

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent application with publication number CN1600899A discloses a composite additive for electroless nickel plating, which is composed of complexing agents such as citric acid, buffers such as sodium acetate, accelerators such as succinic acid, and stabilizers such as thiourea; Although it avoids the trouble of a lot of analysis and adjustment of various components, it is more convenient to use; but the service life of the plating solution is only 6-8 cycles, which cannot meet the development requirements of "energy saving, consumption reduction, pollution reduction and efficiency increase".