ORGANIC ADDITIVE AND PROCESS FOR CHROMIUM PLATING ON STAINLESS STEEL

By adding some additives in conventional chromium plating solution,some key parametess of the technological process for chromium plating,such as current density,working temperature and working time,were studied.The optimum formulation for the chromium plating was determined to be 250g/L CrO3,2.5g/L H2SO4,3g/L Cr3+,10g/L HCHO and 10g/L (CH2COOH)2,and the optimized parameters for the process were recommended as follows:room temperature,pH value of the solution 1.5,current density of 30A/dm2 and electroplating time of 60 minutes.It could help not only to increase the cathodic current efficiency of the chromium-plating solution,but also to obtain smooth appearance,high hardness and wearability of chromium electrodeposits.