Phosphorus chemical nickel plating concentrated solution and plating process

Abstract

The invention discloses a phosphorus chemical nickel plating concentrated solution and a plating process, the concentrated solution comprises three parts of an A solution, a B solution and a C solution, a main salt, a brightening agent, an accelerating agent and deionized water are mixed into the A solution at room temperature; a first buffer, a first complexing agent, sodium hypophosphite, a stabilizer, polyethylene glycol 6000, a brightening agent and deionized water are mixed into the B solution at room temperature; a second buffer, a second complexing agent, the stabilizer, the sodium hypophosphite, the polyethylene glycol 6000, the accelerating agent, the brightening agent, ammonia and the deionized wate are mixed r at room temperature into the C solution; the A solution and the B solution are used for grooving, and the A solution and the C solution are used for replenishment. According to the volume percentage, the A solution, the B solution, and dilution water are mixed into a chemical nickel plating solution for plating, the nickel content in the nickel plating solution is lower than 4.0g / L, and the A solution and the C solution are replenished. When the concentrated solution is used for nickel plating, deposition rate is quick, coating hardness and wear resistance are high, and the concentrated solution is suitable for chemical nickel plating of aluminum alloy, all kinds of iron alloy, copper alloy, nickel iron alloy, nickel copper alloy and some non conductive substrates.

Description

technical field [0001] The invention belongs to the technical field of electroless nickel plating, and relates to an electroless nickel plating solution, in particular to a medium-phosphorus electroless nickel plating concentrated solution; the invention also relates to a nickel plating process using the nickel plating concentrated solution. Background technique [0002] Medium phosphorus electroless nickel plating is currently the most widely used in industry, mainly used in automobiles, electronics, textile machinery, petrochemical machinery, food industry, office equipment, precision machinery industry, etc. [0003] Most of the existing medium-phosphorus nickel plating solutions use expensive compounds that are not easily available in the market, such as succinic acid, salicylic acid, etc., as complexing agents. If the deposition rate of the coating is too fast, the stability of the plating solution will be poor and the service life will be short. , the coating quality i...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to aim at the shortcomings of the existing medium-phosphorus nickel plating solution, to provide an environmentally friendly, all-bright medium-phosphorus electroless nickel-plating concentrated solution, which has fast deposition rate, good stability and long service life.