An vehicle catalytic electrochemical response will take location and the nickel is evenly deposited everywhere in the aspect being plated. The thickness with the plate will depend upon the period of immersion. To prevent the reaction, get rid of the section from the solution.  This could be my individual advice https://caswellengineering89900.mdkblog.com/43385204/cibse-approved-cpd-can-be-fun-for-anyone