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Black oxidation is a passivation coating process for ferrous materials that provides a decorative black finish and a relative increase in corrosion resistance to treated parts. It is quite usual to impregnate a layer of oil in order to improve corrosion resistance.
The great advantages of black oxidation are thye small layer thickness and the low cost.
Application examples:
- Cutting tools, springs, valve bodies, toolholders, fasteners,molds, components and hydraulic machine blocks, chains, sprockets, gears, screws, hand and machine tools, automotive components in general, tubes and fittings, etc.
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Black Oxidation in tubes and fittings
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It is a possible to evaluate the black oxidation process to observe the result achieved
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Evaluation of black oxidation using 5% oxalic acid solution according to Standard MIL-DTL-13934D |
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