半光明镍电镀工艺(国外英文资料).docVIP

半光亮镍电镀工艺 Foshan renchang chemical co., LTD RC - M92 semi-gloss nickel plating process 1. Craft characteristics: ? The rc-m92 semi-bright nickel process is designed for the high quality of the electroplating that is required for corrosion resistance, which is a semi-bright nickel substrate in the plating of a double-layer nickel or multi-layer nickel system. ? The coating contains less than 0.003% sulphur content, a semi-bright nickel layer and bright nickel-layer potential difference of 120-145mv and corrosion-resistant. ? The coating is soft and good, the covering ability is strong, the filling effect is excellent. ? High concentration of light and low consumption; ? It does not contain coumarin, it breaks down the products, it is stable and easy to maintain, and reduces the cost of wastewater treatment and reactive carbon processing. . Coating composition and operating conditions: Composition and process conditions of coating Scope of application Normally open cylinder dosage Nickel sulfate 240-300 grams/liter 270 g/l Nickel chloride 45 to 55 grams/liter 50 g/l Boric acid 40-50 g/l 45 g/l RC - M91 softener 4 to 6 ml/l 5 ml/l RC - M92 leveling agent 0.4-0.8 ml/liter 0.6 ml/l RC - M93 stabilizer 0.4-0.8 ml/liter 0.6 ml/l Semi-bright nickel wetting agent 1-2 ml/l 1.5 ml/l The temperature 45 to 55 ℃ 50 to 55 ℃ PH 4.0 to 4.8 4.3 Current density 2-6 amperes/square meters 4 amperes/square meters Mixing way Air or mechanical stirring Air or mechanical stirring Filtering way Continuous loop filtration Continuous loop filtration The liquid preparation method ? In preparation into two thirds of the water in the tank, heating to 60-70 ℃; Add the necessary nickel sulfate and nickel chloride, so that it is completely dissolved. Stir in another container, dissolve the boric acid to heat water, pour into the above solution. ? Add 2 ml/l 30% hydrogen peroxide (diluted add), and stir for 1 hour, and then heating to 65-70 ℃, 2 hours, to remove excess hydrogen peroxide. ? In 55 to 6