Question

what is rust? write its chemical formula and the reaction. how can we prevent metals from susting? explain the method of Gelvanization​

Answer 1

Explanation:

.

A reddish-brown substance that forms on the surface of iron, etc., caused by the action of air and water

Answer 2

Answer:

The chemical formula of Rust is Fe₂O₃.nH₂O

4Fe+3O₂+nH₂O→2Fe₂O₃.nH₂O

We can prevent metals from getting corroded by :

(i) Electroplating metals with metals like Chromium

(ii) Galvanizing metals with Zinc

(iii) Anodizing metals like Aluminium

(iv) Painting, Lubricating or Greasing metals

In the process of galvanization, metals like iron is coated with a thin layer of zinc. This layer of external metal prevents it from being corroded, due to it preventing the metal's contact with air and moisture or acid to eliminate rusting.