Surface Treatment Specs: dissimilar_metal_protection_graphite
Electroplating and surface treatment specifications covering thickness ranges, hardness, corrosion resistance (salt spray hours), wear resistance, operating temperature limits, substrate compatibility, applicable standards, and finish appearance. Processes include zinc plating (clear/yellow/black chromate), zinc-nickel, bright electrolytic nickel, electroless nickel (mid/high phosphorus), hard chrome (hexavalent and trivalent), decorative chrome, tin, silver, gold, cadmium, anodizing (Type I/II/III per MIL-A-8625), zinc/manganese phosphate, black oxide, stainless steel passivation, and electropolishing.
| treatment category | treatment variant | dissimilar coupling context | notes | process type | standard | substrate compatibility |
|---|---|---|---|---|---|---|
| dissimilar_metal_protection_graphite | rank1_plate_plus_seal_or_conformal | true | Rank 1 (most protective): Plate graphite to minimize electrical potential difference between graphite and metal to be joined; seal faying edges to preclude corrosion at contacting metal surface for electrical service, or apply conformal coating | electroplate + seal faying edges or conformal coating | (none specific) | graphite |
| dissimilar_metal_protection_graphite | rank2_bare_sealed | true | Rank 2 (least protective listed): May be used bare in electrical or thermal conducting service, conditions permitting; seal faying edges | bare with sealed faying edges | (none specific) | graphite |
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