... :Q235, 304, 316L, etc. Surface treatment:electro-galvanized, electro-galvanized nickel alloy, hot-dip zinc, electrostatic spray and electrolyte polish (stainless steel ... :Q235, 304, 316L, etc. Surface treatment:electro-galvanized, electro-galvanized nickel alloy, hot-dip zinc, electrostatic spray and electrolyte polish (stainless steel ...