Method for restoring dimension discrepancy of bearing utilizing chemical plating nickel

Abstract

An application of chemically plating nickel, especially a method of repairing different sizes of bearing by chemically plating nickel. The method comprises : washing bearings with gasoline; washing bearings with methanol; washing bearings with warm water, the temperature of the warm water is 60 -70degree Cú¼washing for 2 min; washing bearings with chemicals, the temperature thereof is 60-70degreeCú”washing with cool water; immersing in an acid and activating for 1-2min, the concentration of the acid is 10í†5ú”washing with cool water; preheating bearings with hot water for 5-10min, the temperature thereof is 80-90 degree C;preparing the chemical plating nickel solution.

Description

Technical field [0001] The invention relates to the application of an electroless nickel plating method in the field of material surface treatment, in particular to a method for repairing the bearing out-of-tolerance size by electroless nickel plating. Background technique [0002] At present, the electroless nickel plating technology is widely used at home and abroad. Its main advantage is that it uses the principle of chemical reduction to reduce nickel ions to nickel and deposit on the metal surface without the need for external current. Alloy coating, the formed coating has the characteristics of uniformity, smoothness, acid resistance, alkali resistance, and high hardness. Based on the above characteristics, we applied electroless nickel plating technology to repair bearing out-of-tolerance dimensions. The first electroless nickel plating materials were all analytical pure chemical reagents. The cost is high, the electroplating range is small, and it is not suitable for larg...

AI Technical Summary

Problems solved by technology

Based on the above characteristics, we apply the electroless nickel plating technology to repair the out-of-tolerance size of bearings. The initial use of electroless nickel plating materials is all analytical pure chemical reagents. The cost is high, and the electroless plating range is small, which is not suitable for large-scale production.

Especially in terms of technology, the plating solution is not stable, often occurs solution decomposition, turbidity, short service life, and the solution can only be used for four cycles generally, which is not economical and wastes chemical raw materials, and also causes certain pollution to the environment.