The cold galvanizing of SPA-C weathering steel sheet is electro-galvanized, and the amount of galvanizing is very small, only 10-50g/m2. Its corrosion resistance is very different from that of SPA-C weathering steel sheet hot-dip galvanizing.
In order to ensure the quality, SPA-C weathering steel sheet. Most regular processing manufacturers do not use electro-galvanized weather-resistant steel plate.
Only small enterprises with small scale and backward equipment use electro-galvanization, and of course the price is relatively cheap. Cold galvanizing of SPA-C weathering steel sheet and independent layering of weathering steel substrate. Because the zinc layer is thin and the zinc layer is simply attached to the SPA-C weathering steel sheet, the processed substrate is easy to fall off. Therefore, the corrosion resistance of SPA-C weathering steel sheet is poor.
