Usoro ọgwụgwọ elu igwe bụ n'ozuzu: ụzọ electrochemical, gụnyere electroplating, oxidation. Ụzọ kemịkalụ, gụnyere ọgwụgwọ ihe nkiri ntughari kemịkalụ, plating kemịkalụ. Usoro nhazi okpomọkụ, gụnyere ntinye ọkụ na-ekpo ọkụ, spraying thermal, hot stamping, chemical heat tre ...
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