Nickel-phosphorus-cobalt ternary alloy electroless plating solution for alloy steel workpieces and production method

Abstract

The invention discloses nickel-phosphorus-cobalt ternary alloy electroless plating solution for alloy steel workpieces. The solution is characterized by comprising the following raw materials by weight percent: 5-10% of nickel chloride, 5-10% of sodium hypophosphite, 5-10% of cobalt chloride, 5-10% of ammonium chloride, 1-6% of lactic acid, 10-15% of sodium citrate, 0.3-0.5% of compound complexing agent, 1-3% of rare earth additive and the balance of water. A production method comprises the following steps: adding calculated and weighed water to a reactor, raising the temperature to 38-42 DEG C, starting a stirrer, controlling the rotating speed of the stirrer to be 120r / min, then slowly adding the calculated and weighed nickel sulfate hexahydrate, sodium hypophosphite, sodium citrate, succinic acid, ammonium sulfate, stabilizing agent and compound complexing agent to the reactor in sequence, stirring the materials while adding until the solution becomes green transparent liquid and carrying out emptying and packaging when the solution is cooled to the room temperature.

Description

technical field [0001] The invention relates to an electroless plating solution and a production method, in particular to a chemical plating solution with stable process, less usage, low cost, fast film forming speed, fine coating, high hardness, strong wear resistance and corrosion resistance, and easy operation and management. An alloy steel workpiece nickel-phosphorus-cobalt ternary alloy electroless plating solution and a production method thereof. Background technique [0002] Electroless plating relies on the chemical reaction in the electroless plating solution to provide the electrons required for the reduction of metal ions. When the metal ions absorb the electrons, they are evenly deposited on the surface of the workpiece to form a coating. Since the dispersion force of the electroless plating solution is close to 100%, there is no obvious edge effect and the thickness of the coating is very uniform, smooth, dense and non-porous, especially suitable for workpieces ...

AI Technical Summary

Problems solved by technology

The existing nickel-phosphorus-cobalt electroless plating solution needs to prepare the working solution and the adjustment solution in use, and needs to purchase three plating solutions such as A, B, and C, which is difficult to manage and operate, and there are also many usages and high costs. The problem

Especially there is no nickel-phosphorus-cobalt electroless plating solution specially used for alloy steel workpieces at present