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MPY is used to measure weight loss per unit area.

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MPY is used to measure weight loss per unit area.

(a) True

(b) False

This question was addressed to me in unit test.

Asked question is from Corrosion Rate Expression topic in chapter Corrosion Principles of Corrosion Engineering

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Correct answer is (b) False

Easy explanation: Usually mils per year is used to measure the penetration rate. Penetration is the average depth of metal loss in the specimen. MPY is usually used for pitting corrosion. MDD (milligrams/sq. Decimeter/day) is used to measure the weight loss per unit area.

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