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Alloys with increased amounts of _______ show improved resistance to naphthenic acid corrosion.
Alloys with increased amounts of _______ show improved resistance to naphthenic acid corrosion.A . ChromiumB . MolybdenumC . NickelD . CarbonView AnswerAnswer: B
__________ is a form of stress corrosion cracking normally occurring during shutdowns, startups or during operation when air and moisture are present. Cracking is due to sulfur acids forming from sulfide scale, air and moisture acting on sensitized stainless steel.
__________ is a form of stress corrosion cracking normally occurring during shutdowns, startups or during operation when air and moisture are present. Cracking is due to sulfur acids forming from sulfide scale, air and moisture acting on sensitized stainless steel.A . Caustic SCCB . Chloride SCCC . Polythionic acid SCCD...
Conditions favoring carburization include a high gas phase carbon activity and _______ oxygen potential.
Conditions favoring carburization include a high gas phase carbon activity and _______ oxygen potential.A . LowB . HighC . NegativeD . PositiveView AnswerAnswer: A
Sulfur and chlorine species in fuel will form sulfur dioxide, sulfur trioxide and hydrogen chloride within the combustion products. At low enough temperatures, these gases and the water vapor in the flue gas will condense to form _________ acid.
Sulfur and chlorine species in fuel will form sulfur dioxide, sulfur trioxide and hydrogen chloride within the combustion products. At low enough temperatures, these gases and the water vapor in the flue gas will condense to form _________ acid.A . HydrochloricB . HydrofluoricC . SulfuricD . Both A and CView...
Which of the following may have help accelerate the corrosion?
A 6”, A106 Gr B, flanged line carrying caustic wash water at 200º F has signs of atmospheric corrosion. Which of the following may have help accelerate the corrosion?A . SulfidesB . Fly ashC . CausticD . None of the aboveView AnswerAnswer: B
Corrosion of carbon steel and other alloys from their reaction with sulfur compounds in high temperature environments is called ______. The presence of hydrogen accelerates corrosion.
Corrosion of carbon steel and other alloys from their reaction with sulfur compounds in high temperature environments is called ______. The presence of hydrogen accelerates corrosion.A . Sulfide corrosionB . High temperature corrosionC . H²S corrosionD . SulfidationView AnswerAnswer: D
With CO² corrosion, increasing temperatures _________ corrosion rates up to the point where CO² is vaporized.
With CO² corrosion, increasing temperatures _________ corrosion rates up to the point where CO² is vaporized.A . DecreaseB . IncreaseC . EliminateD . None of the aboveView AnswerAnswer: B
Cadmium and lead will cause LME on _____________.
Cadmium and lead will cause LME on _____________.A . Copper alloysB . 300 Series SSC . Aluminum alloysD . High strength steelView AnswerAnswer: D
With sulfuric acid corrosion, the presence of oxidizers can _______ the corrosion rate.
With sulfuric acid corrosion, the presence of oxidizers can _______ the corrosion rate.A . IncreaseB . DecreaseC . StabilizeD . EliminateView AnswerAnswer: A
A form of corrosion caused by living organisms such as bacteria, algae or fungi is _______ .
A form of corrosion caused by living organisms such as bacteria, algae or fungi is _______ .A . HICB . SOHICC . MICD . None of the aboveView AnswerAnswer: C
