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Which of the following is/are the preventions of erosion-corrosion?

Which of the following is/are the preventions of erosion-corrosion? Correct Answer Selection of better resistant materials, alteration of the environment and applying protective coatings

Methods for minimizing or preventing erosion-corrosion i. Selection of better resistant materials ii. Design of equipment iii. Alteration of environment iv. Applying protective coatings v. Cathodic protection of equipment.

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