Surface Treatment Specs: dissimilar_metal_protection_silver
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_silver | rank1_rhodium_palladium_gold_overplate | true | Rank 1 (most protective): Silver or silver-plated parts used as electrical open-close contact points, plugs and receptacles should be plated over with rhodium, palladium, or gold | precious metal overplate | (rhodium, palladium, gold plate per applicable spec) | silver |
| dissimilar_metal_protection_silver | rank2_sulfur_free_conformal_coating | true | Rank 2: May be used in stationary components of electrical assemblies (connectors, printed circuits) but should be enveloped by sulfur-free conformal coatings | conformal coating | (none specific) | silver (stationary electrical assembly components) |
| dissimilar_metal_protection_silver | rank3_chromate_plus_inhibiting_fluid | true | Rank 3 (least protective listed): Apply chromate conversion coating post-treated with a corrosion inhibiting fluid film; for parts of electrical plugs, receptacles, etc. | chromate conversion + corrosion inhibiting fluid film | (none specific) | silver (electrical plugs, receptacles) |
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