超聲波除蠟─熱水洗(75℃)─化學(xué)除油─熱水洗─三級(jí)逆流清洗─陰極電免除油─熱水洗─三級(jí)逆流清洗─酸浸蝕(體積分?jǐn)?shù)為2%的硫酸+體積分?jǐn)?shù)為2%的氫氟酸,室溫,分出氣泡后逗留2s)─三級(jí)逆流清洗─預(yù)浸(氰化鈉50g/L,室溫,10s)─氰化鍍銅(氰化亞銅30g/L、氰化鈉45g/L、酒石酸鉀鈉20g/L,50℃,3min,Jk=1.0A/dm2)
─收回─三級(jí)逆流清洗─酸活化(體積分?jǐn)?shù)為10%的硫酸,室溫,0.5min;下同)─三級(jí)逆流清洗─焦磷酸鹽鍍銅(焦磷酸銅65g/L、焦磷酸鉀300g/L、氨水3mL/L、亮光劑適量,56℃,15min,Jk=2A/dm2,pH=8.8)─收回─三級(jí)逆流清洗─酸活化─三級(jí)逆流清洗─硫酸鹽鍍銅(硫酸銅200g/L、硫酸60g/L、氯離子60mg/L、亮光劑適量,23℃,15min,Jk=3.5A/dm2)─收回─三級(jí)逆流清洗─酸活化─三級(jí)逆流清洗─硫酸鹽鍍鎳(硫酸鎳200g/L、氯化鎳60g/L、硼酸50g/L、亮光劑適量,50℃,10min,pH=4.6,Jk=4A/dm2)─收回─三級(jí)逆流清洗─酸活化─三級(jí)逆流清洗─鍍白鉻(鉻酸酐230g/L、硫酸2.3g/L、三價(jià)鉻3g/L、增加劑2.3g/L,45℃,1min,Jk=20A/dm2)─收回─三級(jí)逆流清洗─六價(jià)鉻復(fù)原(亞硫酸氫鈉30g/L,室溫,1min)─三級(jí)逆流清洗─超聲波洗凈─三級(jí)逆流清洗─酸中和(分?jǐn)?shù)為5%的硫酸,室溫,0.2min)─三級(jí)逆流清洗─熱純水洗(70℃,1min)─烘干(100℃,25min)─下架─查驗(yàn)─包裝─入庫(kù)。