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Copper Alloy Coating Methods

Hot Dip Coating

Mech	Coating Chemistry	Halt	Coating Chemistry
Thickness 20-80 micro inches	100% Tin	Thickness 20-80 micro inches	100% Tin
Dull Streaked Surface	-	Thickness 40-100 micro inches	60/40 Sn/Pb Solder
Nearly 100% IMC	Cannot Have Undercoat Overall Coat Only No Selective Plating	Thickness 50-150 micro inches	90/10 Sn/Pb Solder
-	-	Thickness 100-200 micro inches	-
-	-	High Thickness Variation	Cannot Have Undercoat
-	-	Pretty, Shining Surface	Overcoat Only
-	-	Dense, Large Grain Structure	No Selective Plating

Electro Tin Method

ESN	Coating Chemistry	Reflow	Coating Chemistry
Thickness < 500 micro inches	100% Tin(Matte or Bright)	Thickness 40-80 micro inches	100% Tin
Consistent Thickness Variation	Sn/Pb Solder Combinations	Consistent Thickness Variation	-
Bright or Matte Surface	Ni, Pd, Ag, Au, PdNi	Pretty, Shining Surface	Can Have Undercoat
Porous Structure	Cannot Have Undercoat Can Selectively Plate (Stripes,Spots) Susceptible to Whiskering	Dense, Large Grain Structure	Overall Coat Only

Coatings - Finishing:

Finishing:
There is a wide choice of natural finishes and different types of surfaces available with coppermetals. All coppermetals have a natural color of their own which is generally preferred. Even though all copper alloys will tarnish, the natural finish can be maintained by periodic cleaning or by applying a protective coating, such as clear lacquer, which will last for a long period of time. In addition to the natural finishes, coppermetals can be easily plated with tin, nickel, chromium and silver.