Titanium Hydriding damage occurs primarily in sour water strippers and amine units in the overhead condensers, heat exchanger tubes and other titanium equipment operating above _________.
A. 300º F
B. 270º F
C. 210º F
D. 165º F
__________ is a change in the microstructure of steels after exposure in the 850?F to 1400?F range, where the carbide phases in carbon steels are unstable and may agglomerate from their normal plate-like appearance.
A. Carburization
B. Spheroidization
C. Graphiding
D. 885?Embrittlement
_________ is the main concern during start-up, shutdown and/or hydro testing for equipment/piping operating at elevated temperatures. This event can also occur in an auto refrigeration event in units processing light hydrocarbons.
A. Stress fracture
B. Carburization
C. Spheroidization
D. Brittle fracture
MIC is often found in _________, bottom water of storage tanks, piping with stagnant or low flow and piping in contact with some soils.
A. Vessels
B. Heat exchangers
C. Drums
D. All of the above
The effects of hydrogen embrittlement ___________ with _________ temperatures.
A. Increase, increasing
B. Decrease, decreasing
C. Increase, decreasing
D. Decrease, increasing
Ammonium chloride salts are hydroscopic and readily absorb water. A ________ amount of water can lead to very aggressive ammonium chloride corrosion.
A. Large
B. Small
C. Proper
D. Improper
Cracking of dissimilar weld metals occurs in the __________ side of a weld joining 300 Series SS and carbon steel.
A. Austenitic
B. Ferritic
C. Both of the above
D. None of the above
SSC generally occurs below about ________.
A. 225º F
B. 200º F
C. 180º F
D. 150º F
Hydriding of titanium is a metallurgical phenomenon in which hydrogen diffuses into the titanium and reacts to form an embrittling phase. This can result in a complete loss of _________ with no noticeable sign of corrosion or loss of thickness.
A. Strength
B. Ductility
C. Carbides
D. Hardness
Temper embrittlement _________ be prevented if the material contains critical levels of the embrittling impurity elements and is exposed in the embrittling range.
A. Can
B. Cannot
C. Will
D. None of the above
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