Under normal circumstances, the stress of cobalt plating is relatively high. The composition and operating conditions of a low-stress cobalt plating solution are as follows: Cobalt sulfamate 450 g/L Formamide 30mL/L Sodium lauryl sulfate 0.3~0.5g/L Temperature 40℃+10℃ Current density 3.0~5.0A/dm2 Stress reliever (saccharin) 1～1..5g/L The following solution composition and operating conditions can be used for the decorative coating: Cobalt sulfate 350~500g/L Boric acid 30~45g/L Cobalt chloride 45g/L Formaldehyde 10~15mI/L Cadmium sulfate 0.5g/L Saccharin l~1.5g/L Temperature 40℃+10℃ Current density 2~4A/dm2 |
