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API-580 Exam - Topic 3 Question 124 Discussion

_________________curves are referred for the deterioration mechanism for carbon and low ally steel materials.
A) Nelson curves
B) Ph concentration curves
C) Schmidt curves for sulfide corrosion

API-580 Exam - Topic 3 Question 124 Discussion

Actual exam question for API's API-580 exam
Question #: 124
Topic #: 3
[All API-580 Questions]

_________________curves are referred for the deterioration mechanism for carbon and low ally steel materials.

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Suggested Answer: A

by Myra at May 04, 2026, 05:04 AM

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Rolf
1 day ago
I thought it was B) Ph concentration curves.
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Almeta
6 days ago
A) Nelson curves are the right answer!
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Fidelia
12 days ago
I’m confused! I thought Schmidt curves were more about sulfide corrosion, but now I'm not sure if that applies to low alloy steel.
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Ciara
2 months ago
I’m leaning towards option A, Nelson curves, but I vaguely remember something about Ph concentration curves too.
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Chau
2 months ago
I feel like I've seen a question about Schmidt curves before, but I can't recall if they specifically apply to carbon steel.
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Sharika
2 months ago
I think I remember something about Nelson curves being related to corrosion, but I'm not entirely sure if that's the right answer here.
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