Although tin ranks below iron in the electrochemical series, why is it still used to coat steel for corrosion resistance?

Chemical Engineering Basics MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Chemical Engineering Basicschemical-engineering › chemical-engineering-basics
Published
11 Feb 2019
Last updated
28 May 2026

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Explanation

Tin is chosen to coat steel primarily because it is less expensive, despite its lower position than iron in the electrochemical series. This cost advantage makes tin a practical protective layer against corrosion.

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