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Which of the following can be used to inhibit stress corrosion cracking in ammoniacal solutions?(a) Addition of 0.2% water(b) Addition of 0.025% hydrazine in refrigeration(c) Addition of oxidizing agents(d) Either addition of 0.2% water or addition of 0.025% hydrazine in refrigerationI got this question during an internship interview.Question is taken from Environments topic in division Other Environments of Corrosion Engineering

Answer»

The correct CHOICE is (d) Either addition of 0.2% water or addition of 0.025% hydrazine in refrigeration

Explanation: OXYGEN and oxidizing AGENTS are the primary cause of stress CORROSION cracking in ammoniacal SOLUTIONS. It can be inhibited by the addition of 0.25% of water or the addition of 0.025% hydrazine in refrigeration.



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