Sheet Metal there are many types, so what do you know about needle-to-stainless steel sheet metal processing? What is the scope of its application? The bottom is sheet metal processing factory get me and you go and have a look. and. There is no maintenance on the surface of the SPCC. When exposed to the gas, especially in wet and cold conditions, it is very easy to be oxidized. Accelerated the air oxidation rate, and the occurrence of dark red rust. In the whole process of application, the surface should be painted, electroplating process or other safeguard measures. Definition: The coil is deoiled, pickled and passivated, electroplated and various post-treatment processes. After the continuous electrogalvanizing production line (chlǐ) passes through the whole production process, it becomes electrogalvanized commodity (Product).