Q. Since corrosion is a penetrating action, it is necessary to make allowances for the reduction in thickness in designing pipes and tanks.

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Q. What should be the approximate thickness of a wall for better performance if the corrosion rate of that wall is estimated as 1/8 inches in 1 year?

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Q. Which of the following is/are the design rules for corrosion prevention?

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Q. Which of the following is the design rule to reduce erosion-corrosion?

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Q. Which of the following is not a design rule for corrosion prevention?

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Q. Uneven temperature distribution leads to higher corrosion rates and may result in stress-corrosion cracking failure.

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Q. Which of the following is/are included in the general term avoid heterogeneity?

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Q. An inhibitor is a chemical substance that added in small concentrations to an environment, to decrease the corrosion rate.

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Q. Which of the following is/are the types of inhibitors?

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Q. Which of the following is an example of adsorption-type inhibitors?

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Q. Which of the following inhibitors are effective in acid solutions?

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Q. Which of the following is/are the examples of Hydrogen-evolution poisons?

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Q. Which of the following is/are the examples of scavengers?

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Q. Oxidizers such as chromates, nitrates, and ferric salts inhibit the corrosion of metal and alloys that demonstrate active-passive transition.

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Q. Which of the following is/are the characteristics of the vapor phase inhibitor?

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Q. Which of the following phenomenon in which the inhibiting effect is sometimes greater than that would be achieved by either of the two or substances alone?

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Q. Which of the following is/are the limitations of inhibitors?

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Q. Which of the following inhibitor is used for aluminum in the hydrogen peroxide environment?

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Q. Which of the following inhibitor is used for steel in 80% pure sulfuric acid?

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Q. Which of the following inhibitor is used for steel in the water?

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