Chemical-deposition nickel-plating method

Abstract

This invention discloses a method for Ni plating by chemical deposition including: oil elimination, washing, Zn replacement, washing, Zn replacement, washing, Ni chemical-plating, washing and drying. This invention applies an advanced and simple Ni-chemical deposition method, combines a method of high and low NiP and Zn-dip to operate them independently so as to replace the traditional Ni-plating and the continous process method.

Description

technical field [0001] The invention relates to the field of chemical treatment on the surface of metal materials, in particular to an electroless nickel plating process on an aluminum substrate. Background technique [0002] Electroless nickel plating is also called electroless nickel plating. As the name implies, it is a surface treatment method that attaches metal ions to the plated object without electrolysis. Because it does not need electrolysis, there is no problem of high and low current differences, so the thickness of the entire coating is quite uniform, which reduces the processing procedures and costs of components a lot, so it has gradually replaced nickel plating. . Electroless nickel plating first deposits a layer of nickel on the catalytically active collective surface immersed in the plating bath, so that the reaction continues and gradually forms a protective layer of metal phosphorus-nickel alloy. Due to the existence of phosphorus, the lubricity of this...

AI Technical Summary

Problems solved by technology

Although this method is relatively simple in process and low in cost, its product has poor acid and alkali corrosion resistance, wear resistance and pressure resistance, and its service life and product hardness are difficult to meet the increasingly higher requirements of the market.

[0004] In summary, the electroless nickel plating process of the prior art clearly has inconvenience and defects in actual use, so it is necessary to improve

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