……….is a process of forming a thick oxide layer on the …… of metal.
Anodizing
surface
For Example:
Hence, Anodizing is the process of forming a thick oxide layer on the surface of the metal.
What chemical process is used for obtaining a metal form its oxide?
……….is a process of forming a thick oxide layer on the …… of metal. This oxide layer is ….. and prevents the metal from further …….