Q. What is the usual direction for the growth of pits?

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Q. Pitting usually requires an incubation period ranges from months to years.

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Q. Which of the following corrosion form is considered as the intermediate stage between uniform corrosion and complete corrosion resistance?

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Q. Which of the following corrosion form is/are autocatalytic in nature?

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Q. Which of the following statement is correct regarding pitting corrosion?

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Q. Which of the following is/are the difference between the crevice and pitting corrosion?

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Q. Which of the following ions have a high tendency to pitting corrosion?

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Q. Which of the following ions, that can reduce pitting corrosion?

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Q. Which of the following corrosion test is most reliable to know the extent of pitting corrosion?

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Q. Which of the following is/are more reactive in intergranular corrosion?

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Q. What is Intergranular corrosion?

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Q. Which of the following is/are the causes of intergranular corrosion?

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Q. Which of the following alloys is/are prone to intergranular corrosion?

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Q. Numerous failures of 18-8 Stainless steel have occurred in the temperature range of 950 to 1450°F.

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Q. What is the molecular formula of chromium carbide formed due to the depletion of chromium in 18-8 stainless steel?

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Q. Which of the following areas is/are corroded in the intergranular corrosion of stainless steel?

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Q. What is the minimum percent of chromium is needed to make stainless steel?

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Q. Which of the following characteristics of the impoverished area, results in a rapid corrosion attack?

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Q. What is the structure of chromium carbide that precipitates at the grain boundaries?

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Q. Which of the following term is associated with intergranular corrosion in welded structures?

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