pickling：酸洗 heat treatment：热处理 case hardening：表面淬火 carburizing：渗碳 black oxide coating：黑色氧化物涂层 annealing：退火 hardening：硬化 phosphating：磷化 galvanizing：镀锌 chrome plating：镀铬 powder coating：粉末涂覆 sandblasting：喷砂处理
Pickling is the process of removing rust, scale and other impurities from the surface of metal components by immersing them in an acid bath. Heat treatment is the process of heating and cooling metals to alter their physical and mechanical properties without changing their composition. Case hardening is a process of hardening the surface of a metal component while leaving the core soft and ductile. Carburizing is the process of adding carbon to the surface of a metal component to increase its hardness while leaving the core soft and ductile. Black oxide coating is a popular protective coating that is applied to components made of steel, aluminum and other metals. Annealing is a process of heating and cooling metal components to modify their physical and mechanical properties and relieve stress in the material. Hardening is the process of increasing the hardness and strength of a metal component by heating it and cooling it at a controlled rate. Phosphating is the process of applying a protective coating to metal surfaces to increase their corrosion resistance. Galvanizing is the process of applying a protective coating to metal components to prevent them from corrosion. Chrome plating is a finishing process where a layer of chrome is applied over metal surfaces for improved appearance and corrosion resistance. Powder coating is a process of applying a protective and decorative finish to metal components by spraying them with a dry powder. Sandblasting is the process of abrasive blasting a component with a stream of high-pressure dry sand particles to remove rust, dirt, scale and other contaminants.
