Q. Why straight chromium stainless steels and austenitic stainless steels are not recommended for hydrofluoric acid applications?

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Q. Which of the following metal is an outstanding material that resists all concentrations of hydrofluoric acid at all temperatures?

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Q. Which of the following is/are the impurities in commercial hydrofluoric acid that decreases corrosion of steel?

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Q. Which of the following metal is suitable in handling high concentrations (>60%) of hydrofluoric acid?

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Q. Hydrofluoric acid and fluorine are toxic and extreme care are mandatory in the handling of these materials.

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Q. Which of the following material is/are primarily used for hydrofluoric acid?

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Q. Which of the following impurity in hydrochloric acid results in pitting corrosion?

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Q. Which of the following metals will have a high influence on aeration and oxidizing agents in hydrochloric acid?

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Q. Which of the following is/are the class2 corrosion resistance materials in hydrochloric acid?

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Q. Duriron has better corrosion resistance than Durichlor in hydrochloric acid.

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Q. Which of the following is/are the class1 corrosion resistance materials in hydrochloric acid?

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Q. Which of the following metal is used for hydrochloric acid to avoid contamination?

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Q. Which of the following is/are the class3 corrosion-resistant materials in nitric acid?

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Q. Which of the following polymer has excellent corrosion resistance to nitric acid?

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Q. Which of the following is/are the class2 corrosion-resistant materials in nitric acid?

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Q. Which of the following statements is/are true about titanium?

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Q. What are the principal applications of Duriron?

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Q. The corrosion resistance of Durichlor to nitric acid is better than that of Duriron.

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Q. Duriron exhibits excellent corrosion resistance in concentrations over 45% at temperatures including boiling.

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Q. Which of the following steels will have less corrosion rate in boiling 65% nitric acid?

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