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I Forge Iron

Passivation of stainless


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Passivation is a chemical process typically done to stainless with some blend of nitric and/or hydroflouric acid. It removes any surface contamination of free iron and actually converts the outermost layer to an oxide. If you did not passivate, there might be some staining if the contaminants start to rust - or the presence may be so slight as to not cause a problem. If you are bent on doing something, you could likely soak the whole thing in vinegar overnight and get a fairly clean surface without having to deal with the hazmat.

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Grade would be mostly unknown scraps, guess 304 but could be other. welded yes with 309L or 316, or mystery stainless problem solver alloy. Finish most likely sanded or polished. Maybe some forging with 4140 tools.

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