Electro-Galvanized Steel coils and sheet are coated with zinc by the electrolytic galvanizing process.This allow for both side coating,one side coating and differential coating.They are given chromate or phosphate treatment to improve corrosion resistance or paintability.
Galvalume Steel Coil is a new kind of steel product, it is of good corrosion resistance which is similar to stainless steel, but the price is much cheaper than stainless steel
Coating: AZ80-AZ150
Surface of Material: 55%Al, 435%Zn, 1.5%Si
Spangle: Regular spangle
Stainless Steel
Austenitic - good resistance to corrosion in rural, marine and industrial environments.
Martensitic - hardened by quenching followed by tempering for improved toughness and ductilhty.
Ferritic - have the same structure as iron at room temperature, ferritic stainless steel strip uses no nickel but has a minimum chromium content of 11%