Question

Give the comparison between galvanizing and tinning

Answer 1

Galvanizing	Tinning
Processof covering iron or steel,with a thin coat of ZINC to,prevent it from rusting.	Process of coating steel with a,thin coat of TIN to prevent it,from corrosion
Zinc protects iron sacrificially.,Since it is more electro-positive,than iron and does not permit iron to pass into the solution.	Tin protects the base metal iron,from corrosion due to its noble,nature and higher corrosion,resistance.
In galvanized articles, zinc continues to protect the underlying iron by galvanic cell action, even if the coating of zinc,is broken at any place	Tin protects underlying iron till the coat is intact. Any break in coating causes rapid corrosion of,iron.
Galvanized containers cannot be used for storing acidic foodstuffs as zinc reacts with food acid forming poisonous compounds	Tin coated containers and utensils can be used for storing any food stuff as tin is non-toxic and protects metal from corrosion
Ideal temperature is around 450 degree C	Ideal temperature is around 250 degree C
Ammonium chloride is used as flux	Zinc chloride is used as flux