Is there any different between usual nickel bath and bright nickel bath? Actually yes, if we don't add some additional chemical on the bath than the result of electroplating will not bright enough. To make the result bright nickel plating we need a brighteners, that mainly bath use soluble organic compounds, are added, and mostly they are use Watts type with widely varying proportional of chloride and sulfate. Bright acid also always present, usually not less than 35 g/l. The condition in the cathode film also must be suit in order deposition of nickel, this function best at pH value about 3 to 5 and at temperature of about 50 to 65oC.
The brighteners design as class II nickel brighteners are use together with class I brighteners to obtained a brilliant leveling deposit of increasing luster with continued nickel plating to the point of highest luster. Class II brighteners are principally unsaturated compounds which used in conjunction with class I brighteners. The class II brightener compounds especially coumarin, which are used to obtain ductile, semibright, sulfur free nickel plate do make possible ductile, bright or almost bright plate.
The brighteners design as class II nickel brighteners are use together with class I brighteners to obtained a brilliant leveling deposit of increasing luster with continued nickel plating to the point of highest luster. Class II brighteners are principally unsaturated compounds which used in conjunction with class I brighteners. The class II brightener compounds especially coumarin, which are used to obtain ductile, semibright, sulfur free nickel plate do make possible ductile, bright or almost bright plate.