GeneralExceptions are hard chromium plating, electroless plating, plating over aluminum, anodizing phosphatizing and chromating. Electro cleaners are usually considered as final cleaners. They are basically heavy-duty alkaline types, but are always employed with DC current – either cathodic ( direct), anodic ( reverse ) or periodic reverse (alternating anodic and cathodic currents), PRC.
đang được dịch, vui lòng đợi..
