Corrosion resistance
Seed plating	Coarse layer	Thickness	Colour	Corrosion resistance	Salt spray test
Nickel	Ni Ni	10-20um	Silvery white	Good	24-48 hours
	Ni Cu Ni
Black nickel	Ni Cu Ni	10-20um	Bright black	Good	48-72 hours
Zinc	Zn	5-8um	Blue and white color	Good	24-48 hours
	C-Zn color zinc
Environmentally friendly zinc	Zn	5-8um	Colour	Good	16-48 hours
	C-Zn color zinc			Good	24-72 hours
Tin	Ni Cu Ni Sn	10-25um	Tin color	Excellent	48-72 hours
Gold	Ni Cu Ni Au	6-10um	Golden	Excellent	-
Silver	Ni Cu Ni Ag	6-10um	Silvery	Excellent	-
Epoxy	Epoxy	10-25um	Black/Grey	Excellent	24-48 hours
	Ni Cu Epoxy	10-25um			48-72 hours
	Zn Epoxy	10-25um			48-72 hours
Tin	-	1-2um	Silver gray	Temporary protection	-
Phosphorus	-	1-2um	Silver gray	Temporary protection	-

Note: Due to different electroplating processes, the effect of salt spray may vary. The salt spray test effect of roller plating (small products) is generally better than that of hanging plating products (large size products).