摘要
对一次由镀镍槽糖精钠过量引起后续镀装饰铬工序出现质量问题的事故进行了排查和分析,介绍了该故障的处理方法。生产实践表明,在镀铜/镍/装饰铬的过程中,镀镍槽中过量的糖精钠会引起镀铬层出现白斑、黑斑和霉点。将镀镍槽调至pH=3,在液温60°C以上时,按20 mL/L的用量向镀槽中加入5%的高锰酸钾溶液氧化糖精钠,并加1 g/L活性炭吸附氧化产物,可排除故障。
A quality accident caused by excessive sodium saccharin in nickel plating bath and occurred during subsequent decorative chromium plating was surveyed and analyzed, and the corresponding treatment method was introduced. Production practice indicated that the excess of sodium saccharin in nickel plating bath during a Cu/Ni/Cr plating process can cause white or black spots and mildews growing on chromium coating. The malfunction was eliminated by adjusting the pH value of nickel plating bath to 3, keeping the temperature above 60 ℃, adding 5wt% potassium permanganate solution with a dosage of 20 mL/L to oxidize the excessive sodium saccharin, and dosing 1 g/L of activated carbon powder to adsorb the oxidation products.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2014年第3期118-119,共2页
Electroplating & Finishing
关键词
镀镍
糖精钠
镀装饰铬
质量事故
高锰酸钾
氧化
nickel plating
crystallose
decorativechromium plating
quality accident
potassium permanganate
