Surface Treatment Specs: black_oxide
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 | coefficient of friction | finish appearance | hardness max HV (HV) | hardness min HV (HV) | hardness typical HV (HV) | notes | operating temp max C (C) | process type | standard | substrate compatibility | thickness max in (in) | thickness max um (um) | thickness min in (in) | thickness min um (um) | thickness typical um (um) | wear resistance |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| black_oxide | black_oxide_steel | similar to base | matte black | not applicable | not applicable | not applicable | Fe3O4 conversion; no dimensional change; oil/wax topcoat required for corrosion protection; decorative; minimal protection outdoors; Type I hot process 285°F | 300 | chemical conversion | MIL-DTL-13924; ASTM D769 | carbon steel, alloy steel, stainless steel (hot process) | 0.00008 | 2 | 0.00002 | 0.5 | 1 | none (decorative+oil) |
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