Answer to Question #293150 in General Chemistry for Love

Question

pure copper is immune to galvanic corrosion than brass.why?

Answer 1

Galvanic 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.

Even runoff water from copper or brass surfaces can contain enough dissolved copper to cause rapid corrosion. If the use of copper or brass in contact with galvanized items is unavoidable, precautions should be taken to prevent electrical contact between the two metals.

 Joint faces should be insulated with non-conducting gaskets; connections should be made with insulating, grommet-type fasteners. The design should ensure water is not recirculated and water flows from the galvanized surface towards the copper or brass surface and not the reverse.

So, Copper is a mineral and an element essential to our everyday lives. It is a major industrial metal because of its high ductility, malleability, thermal and electrical conductivity, and resistance to corrosion.