nitridation
/nʌɪtrɪˈdeɪʃn/ /nʌɪtrʌɪˈdeɪʃn/Chemistry
noun
A reaction analogous to oxidation but involving nitrogen or ammonia rather than oxygen or water; (Metallurgy ) the process or an instance of nitriding an alloy.
Origin
Early 20th century. From nitride + -ation, after oxidation.