Question

Differentiate between chromium and zinc as electroplating substances.

Answer 1

Dear Student

Zinc is a fine white dust that, unlike iron oxide, doesn’t break down the substrate’s surface integrity as it is formed. Much like aluminum or stainless steel oxidation, zinc plating forms a sacrificial barrier around the substrate – it corrodes first, thereby protecting the metal underneath

Chromium has a shiny appearance, does not corrode and resists scratches.
Since chromium is expensive and it may not be economical to make the whole object out of chromium. So, the object is made from a cheaper metal and only a coating of chromium over it is deposited.


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