Products and preparation of chemical plating liquid for chemical coating of nickle-phosphorus alloy

Abstract

A chemical plating liquid for the Ni-P alloy layer is prepared from nickel sulfate, propionic acid, sodium hypophosphite, butanedioic acid, sodium citrate, potassium iodide, lactic acid, polyethanediol and distilled water through proportioal mixing, and regulating pH=4.8-5.2 by ammonia water. Its advantages are high stability and long service life.

Description

technical field [0001] The invention relates to metal surface treatment, in particular to a method for preparing an electroless plating solution of a nickel-phosphorus alloy electroless plating layer and a product thereof. Background technique [0002] Electroless nickel plating (also known as self-catalytic nickel plating) is a film-forming technology that deposits a metal coating on a solid surface by using a nickel salt and a reducing agent in the same solution for self-catalyzed redox reactions. It is an emerging surface engineering technology. . The prior art discloses a plating solution for nickel alloy electroless plating, containing 8-12 g / l of nickel sulfate, 35-49 g / l of sodium hypophosphite, 15-20 g / l of trisodium citrate, and 10-10 g / l of lactic acid in each liter of the solution. 912ml / l, polyethylene glycol 0.15~0.3ml / l, sodium acetate 15~20g / l, copper sulfate 0.5~1g / l, chromium chloride 8~15g / l, sodium molybdate 0.4~0.8g / l, The stabilizer is 0.5-0.3g / l, and ...

AI Technical Summary

Problems solved by technology

The electroless plating solution is a multi-component plating solution, with many raw material components, difficult maintenance and maintenance of the plating solution, short life, high cost and poor stability, which is not conducive to repeated and stable use in mass production