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Dust of pure _________ is used to cover the article to be treated for corrosion in the method of sherardising.

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Dust of pure _________ is used to cover the article to be treated for corrosion in the method of sherardising.

(a) Platinum

(b) Zinc

(c) Copper

(d) Barium

This question was posed to me in homework.

I want to ask this question from Ferrous Metals topic in division Air Conditioning, Thermal Insulation, Stones & Ferrous Metals of Construction & Building Materials

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Correct option is (b) Zinc

Easy explanation: Dust of pure zinc is used to cover the article to be treated for corrosion in the method of sherardising. It is then heated to a suitable temperature in an airtight steel box which results in the melting of zinc. It then combines with the metal and creates a protective layer on its surface and thus prevents it from rusting.

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