liquid cyaniding

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Case hardening — or surface hardening is the process of hardening the surface of a metal, often a low carbon steel, by infusing elements into the material s surface, forming a thin layer of a harder alloy. Case hardening is usually done after the part in question … Wikipedia
cyanide — /suy euh nuyd , nid/, n., v., cyanided, cyaniding. n. 1. Also, cyanid /suy euh nid/. Chem. a. a salt of hydrocyanic acid, as potassium cyanide, KCN. b. a nitrile, as methyl cyanide, C2H3N. v.t. 2. to treat with a cyanide, as an ore in order to… … Universalium

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