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Exam API-571 topic 1 question 147 discussion

Actual exam question from API's API-571
Question #: 147
Topic #: 1
[All API-571 Questions]

Ammonium chloride corrosion is the general or localized corrosion, often pitting, normally occurring under ammonium chloride or amine salt deposits. All commonly used materials are susceptible to ammonium chloride corrosion. A small amount of _________ can lead to very aggressive corrosion.

  • A. Ammonium chloride
  • B. Amine
  • C. Water
  • D. Salt
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Suggested Answer: C 🗳️
by ahmadmm at Oct. 11, 2023, 5:13 a.m.

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ahmadmm
1 year, 1 month ago
Ammonium chloride salts are hygroscopic and readily absorb water. A small amount of water can lead to very aggressive corrosion [>100 mpy (>2.5 mm/yr)].
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