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Which of the following is/are the cleaning methods after the exposure of specimen?

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Which of the following is/are the cleaning methods after the exposure of specimen?

(a) Sandblasting

(b) Rubber-stopper

(c) Use of chemical and solvents

(d) Sandblasting, rubber-stopper and use of chemical and solvents

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This interesting question is from Testing topic in portion Corrosion Testing of Corrosion Engineering

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The correct option is (d) Sandblasting, rubber-stopper and use of chemical and solvents

The best explanation: Cleaning methods after the exposure of specimen:

Mechanical methods such as scraping, brushing, sandblasting and the rubber stopper

Chemical methods in which chemical solutions and solvents are used for removal

Electrolytic methods in which specimen is made cathode under an impressed current.

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