... and tube on plate evaporator 1.Eye-pleasing appearance,excellent performance 2.super-strong anti-corrosion Raw materialCopper or Al tube ... plate punching, Surface cleaning, Bounding, Weld the suction, Tube assembly, Leakage test, Drying, Surface cleaning, Coating, Inspection ... Specification of coatingCoating thicknessThickness of flat plate or tube powder painting: 30 100umHardness of coating≥2HImpact ...