METAL CONNECTOR OR ADAPTOR FOR HYDRAULIC OR OIL DYNAMIC APPLICATION AT HIGH PRESSURE AND RELATIVE GALVANIC TREATMENT FOR CORROSION PROTECTION

摘要

The metal connector or adaptor for hydraulic or oil dynamic application at high pressure, comprises electrolytic passivated zinc plating free from hexavalent chromium, the zinc plating comprising an external trivalent chromium passivation layer, said passivation layer having a distinctive unique coloration among high corrosion resistance processes.