Analysis of unqualified electroplating nickel layer can be repaired plating method

Because in the process of vacuum plating or traditional metal water electroplating in the process of Nickel plating In the production process, when the thickness of the nickel layer is not enough, or there are defects that are not plated with nickel, the patch plating method can be used.

First, anodize the workpiece in the following solution:

Additive dosage of sulfuric acid

750g/L

Additive dosage of glycerol

60g/L

Additive dosage of chromic anhydride

50g/L

Additive dosage of oxalic acid

l0g/L

The temperature control range in the electroplating process

l5～25℃

DA specific parameters

0.8～1.2A/dm2

The grasp of the time in the electroplating process

4～7s

The parts treated with the above solution are immediately immersed in 1:3 hydrochloric acid for 1 to 3 seconds. This is mainly to wash away the chromic acid that may be attached to the workpiece, and then quickly place it in cyanide after washing with water.Copper plating Copper plating in the solution tank.

DK specific parameters

0.1～O.2A/dm2

Time accuracy

5～lOmin

The workpiece after the vacuum electroplating of copper is washed with water and immersed in 30-50g/L dilute sulfuric acid. After washing with water, it is immediately put into the nickel plating tank, and nickel plating is added according to the original process conditions. The replating time can be determined according to the required thickness.