Question

What is the chemical that is applied on brass/copper to make it iron repellant? i.e It will repel iron/aluminium/steel/brass​

Answer 1

Answer:

Galvanic corrosion (also called bimetallic corrosion or dissimilar metal corrosion) is an electrochemical process in which one metal corrodes preferentially when it is in electrical contact with another, in the presence of an electrolyte. A similar galvanic reaction is exploited in primary cells to generate a useful electrical voltage to power portable devices