Steel articles rust on exposure to air. They can be given a coat of paint to prevent rusting. But paints may not last long. Galvanizing is a process in which articles made of steel or iron are dipped in molten zinc. On removal. a thin coating of zinc, which is non-rusting, remains stuck to the article.
Tin coat
Tin is a costly metal many times costlier than steel. So-called ‘tin’ cans are, in reality made of steel and given a very thin coating of tin by dipping them in molten tin.
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