Method of carrying out chemical nickel-plating phosphorus alloy treatment on ZK61M magnesium alloy complex part

Abstract

The invention relates to a method of carrying out chemical nickel-plating phosphorus alloy treatment on a ZK61M magnesium alloy complex part applied to a spacecraft. The method comprises the following steps: first, a magnesium alloy part is subjected to pretreatment, then chemical plating is carried out, finally enclosing and heat treatment are carried out, wherein, the pretreatment comprises alkaline cleaning, two steps of activation and water washing in the various procedures; chemical plating liquid adopts nickel sulfate as main salt, sodium hypophosphite as a reducing agent, sodium acetate, amino acid, ammonium sulfate and the like as a complexing agent, sodium acetate as a buffering agent, and OP-10 as a wetting agent; and the magnesium alloy part after the pretreatment is subjected to plating application in a plating solution at 80-90 degrees for 1-2h, and a bright, smooth and good-corrosion-resistance nickel phosphorus alloy coating can be obtained. The method is applicable to the chemical nickel-plating phosphorus alloy treatment on the ZK61M magnesium alloy complex part of the spacecraft, so as to meet the corrosion prevention requirement and other special functional requirements.

Description

technical field [0001] The invention relates to a method for electroless nickel-phosphorous alloy plating on ZK61M magnesium alloy complex parts used for spacecraft, and belongs to the technical field of spacecraft engineering. Background technique [0002] Magnesium resources are abundant, with a content of 2.1% to 2.7% in the earth's crust. It is the sixth metal element after aluminum, iron, calcium, sodium, and potassium. Magnesium is one of the lightest metallic materials with a density of only 1.7 g / cm 3 ; Magnesium alloy has low density, high strength and good rigidity; good damping performance and strong absorption capacity; good castability and processing performance. In view of the advantages of light weight, good mechanical properties and processing performance of magnesium alloy, magnesium alloy has become a metal material widely used in the lightweight design of my country's spacecraft. However, due to the poor corrosion resistance of magnesium alloy itself a...

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Problems solved by technology

[0004] The purpose of the present invention is to make up for the existing electroless nickel-phosphorus alloy plating process that cannot meet the production and coating requirements of ZK61M magnesium alloy complex parts of spacecraft, and propose a kind of electroless nickel-phosphorus plating suitable for batch production of ZK61M magnesium alloy complex parts of spacecraft Alloy process

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