Q49 of 400 Page 192

Name two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface.

The two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface are Aluminium and Zinc.

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48 What elements are present in steel? How are the properties of steel different from those of pure iron? 48 Give the constituents and one use of brass. 49 Name five methods of preventing rusting of iron. 49 What are the constituents of stainless steel? What are the special properties of stainless steel?