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Which of the following electrochemical methods is/are used to determine the corrosion rate?

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Which of the following electrochemical methods is/are used to determine the corrosion rate?

(a) Tafel extrapolation

(b) Linear polarization

(c) Tafel extrapolation and linear polarization

(d) Neither Tafel extrapolation nor linear polarization

I got this question in a national level competition.

My question is based upon Modern Theory Applications topic in division Modern Theory Applications of Corrosion Engineering

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The correct answer is (c) Tafel extrapolation and linear polarization

The explanation is: Tafel extrapolation and linear polarization are the two electrochemical methods used to determine the corrosion rate. These methods are extensively used for laboratory and industrial corrosion tests.

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