Abstract
Stress of Nickel deposited in bright nickel plating baths was measured with Brenner and Senderoff type stress meter. Result is as follows.
1) The first class brighteners give compressive stress.
2) The second class brighteners give tensile stress.
3) When a little amount of the second class brightener is gradually added to the nickel plating bath with a certain ammount of the first class brighteners, tensile stress is increased. But, on the contrary, when a little amount of the first class brightener is gradually added to the nickel plating bath with a certain ammount of the second class brightener, tensile stress is not decreased more than a certain definite value.
4) Stress of nickel electrodeposited in the bath with acetylen type brightener and in Weisberg bath, differs greatly depending on the air agitation. When the air agitation is applied, stress in the deposit is greater than when it is not applied.
5) With the acetylene type brightener in nickel plating bath, the higher the concentration of Ni++, H3BO3 and Dk is and the higher the current density is, the more decreases the stress of the nickel deposit. The higher the concentration of Cl- and the higher the temperature of bath, the more increases the stress.
