The price of electric galvanizing is cheap, the appearance can be generated by chemical passivation blue, colorful, black and other appearance, the general application of iron corrosion protection, has a certain appearance effect, but relatively low grade.

Aluminum anode points a lot of kinds, as a functional, primarily for decoration or wear-resisting, the advantage of anodic film is hard, if is crowded type aluminum, through some mechanical pretreatment, redo anode, anode layer appearance is very beautiful, the defect is not conductive, if have need local conductive, covered area or need to adopt the anode after removal of anodic film of the region