Material-Material Compatibility

Material-Material Compatibility: Material-material compatibility is defined in terms of any adverse chemical reaction (galvanic corrosion) that can occur when parts made of different materials come in contact in the final assembly of a structural component. The degree to which two materials are incompatible can be determined based on the division of materials into five electromotive groups [1] as shown in the table below.

Electromotive Group	Metal or Alloy
I	All magnesium alloys
II	All aluminum alloys, zinc, cadmium, and nickel-zinc alloy
III	Steel, cast iron, lead, tin, lead-tin solder, and 400 series stainless steel
IV	200, 300 and 400 series stainless steel, precipitation hardening steel (PH 13-8Mo, 15-5PH, 17-4PH, 17-7PH, AM 350, A-286), nickel inconel, monel, titanium, chromium, silver, copper, brass, bronze, 70 Cu-30Ni and Hastelloy B
V	Graphite, gold and platinum