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Which of the following metals is/are usually used for heat exchanger tubes carrying water?

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Which of the following metals is/are usually used for heat exchanger tubes carrying water?

(a) Carbon steels

(b) Brass and cupronickels

(c) Arsenical admiralty metal

(d) Brass, cupronickels and arsenical admiralty metal

This question was addressed to me during an interview.

My query is from Environments topic in section Other Environments of Corrosion Engineering

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Right option is (d) Brass, cupronickels and arsenical admiralty metal

Explanation: Brass, cupronickels, and arsenical admiralty metal are usually used for heat exchangers tubes carrying water. Whereas carbon steels are unsuitable as it rapidly corrodes by the cooling water.

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