Cracks formed by carbonate stress corrosion are best detected:
A.
with a penetrant testing technique used after abrasive or high pressure water blasting of the surface.
B.
with an Acoustic Emission Testing technique.
C.
ultrasonic shear wave examination because cracks develop internally.
D.
with a wet fluorescent magnetic-particle testing technique.
The Answer Is:
D
This question includes an explanation.
Explanation:
According to API RP 571 Section 5.1.2.6 (Carbonate Stress Corrosion Cracking - CSCC):
“The cracking is usually intergranular and is most commonly detected using wet fluorescent magnetic-particle testing (WFMT) after surface cleaning. PT may not be sensitive enough to detect fine cracks formed by this mechanism.”
Because CSCC cracks are typically surface-connected and very fine, WFMT offers the best visibility, especially after proper surface prep.
Therefore, Option D is correct.
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