Study on Tin-nickel-copper Alloy Electrodeposition

A new technology that the tin-nickel-copper alloy deposition can be electroplated in the citrate acid system bath was introduced.The effect of pH value,current density,temperature and the concentration of the main salt and copper ion in the bath on composition of the coating were studied.The experimental results showed that under this operate conditions,the obtained layer surface was even,meticulous,high corrosion-resitant and was not easily changed color.