首页>
外国专利>
A method for the electrolytic removal is produced by electrodeposition of nickel -, chromium - or gold layers of copper - or copper alloy surfaces and device for its realization
A method for the electrolytic removal is produced by electrodeposition of nickel -, chromium - or gold layers of copper - or copper alloy surfaces and device for its realization
展开▼
机译:一种电解去除的方法是通过电沉积铜或铜合金表面的镍,铬或金层及其实现的装置而制成的。
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method for electrolytic removal of a galvanic nickel, chromium or gold layer from a metal base of copper or copper alloy, which is carried out in a bath comprising sulphuric acid and phosphorous acid and/or an organic acid in a concentration, in which the potential of the outer layer is negative and that of the metal base is positive relative to the bath. With such conditions the outer layer will be electrolytically removed and the surface of the metal base gets passive. The removal is finished when the current through the bath decreases below a predetermined threshold value. The apparatus for carrying out the method comprises a current sensor for detecting the current, and if the current decreases below the threshold value, the sensor turns on a current breaker for breaking the current through the bath.
展开▼