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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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Shaun
C could be a trick option though.
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Cherelle
5 days ago
True, Nelson is common in literature.
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Cornell
10 days ago
But isn’t A more widely accepted in studies?
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Grover
15 days ago
I’m leaning towards C) Schmidt curves. Sulfide corrosion is key.
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Shaun
21 days ago
I agree, Nelson curves make sense for deterioration.
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Cherelle
26 days ago
I think it's A) Nelson curves. They fit the context well.
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Han
1 month ago
Nelson curves are well-known for this!
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Patria
1 month ago
Wait, are we sure it's not C)? That sounds plausible too.
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Viola
1 month ago
Definitely A) Nelson curves, no doubt about it.
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Rolf
2 months ago
I thought it was B) Ph concentration curves.
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Almeta
2 months ago
A) Nelson curves are the right answer!
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Fidelia
2 months 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
3 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
4 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
4 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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