API 510 Wet H2S Damage- Blistering/HIC/SOHIC/SCC

Hydrogen blistering is caused by

Atomic hydrogen is

Hydrogen blisters that form at different depths can cause

HIC (Hydrogen Induced Cracking) that occurs between hydrogen blisters at different depths in the metal may appear as

SOHIC (Stress Oriented Hydrogen Induced Cracking) usually occurs

SCC (Sulfide Stress Cracking) occurs as a result of the combined action of

Where does SCC (Sulfide Stress Cracking) typically occur

Which of the following materials is susceptible to Wet H2S damage?
A) Only C.S.
B) C.S., low alloys (chromes), and 300 series S.S.
C) C.S. and low alloys (chromes)
D) all materials

The rate of hydrogen diffusing into steel is minimal at

Hydrogen damage can occur when the system has liquid water and dissolved H2S greater than

Hydrogen damage can occur at temps

To minimize the potential for SSC, the hardness in C.S. should be less than

To minimize the potential for Hydrogen Blistering, what is the max hardness allowed in C.S.

Hydrogen blistering and HIC are strongly affected by

Which of the following does not reduce the chance for Hydrogen Blistering or HIC?
A) Use of "clean" steels
B) PWHT
C) Select high-nickel alloys
D) Maintain a pH of 7.0

Which of the following in the process stream increases the probability of Hydrogen Blistering or HIC?
A) Cyanides
B) Polytheonics
C) Napthenics
D) Chlorides

Which of the following should not be used to inspect for Wet H2S Cracking?
A) ACFM
B) SWUT
C) RT
D) WFMPT
E) PT
F) EC