Question

What is the chemical formula of the oxide layer formed on metallic surface after anodising?

Answer 1

Answer:

Sulphuric acid (Type II & III)

Sulfuric acid is the most widely used solution to produce an anodized coating....

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. ... Anodizing is accomplished by immersing the aluminum into an acid electrolyte bath and passing an electric current through the medium.