Question

what is made the cathode during anodising aluminium​

Answer 1

Explanation:

Anodizing process occurs in an electrochemical cell, in which the anode is the anodized part and the cathode is a plate/rod made of a material chemically inert in the acidic electrolyte (carbon, Stainless steels, nickel).

Answer 2

Answer:

process of forming a thick oxide layer on the surface of aluminium aluminium develop a thin layer of oxide when left in air this oxide layer is protective and prevent the metal from for the oxidation this layer can be made more thick by anodizing the process clean aluminium article is taken as anode and H2 s o4 as an electrolyte when electric current is passed O2 gas get liberated which react with metal aluminium to form a thick layer of oxide on its surface