Hydrogen attack of carbon-0. 5-molybdenum steels
Carbon and low-alloy steels are susceptible to deterioration of mechanical properties when exposed to hydrogen gas at elevated temperatures and pressures. The resulting deterioration of properties has been referred to as hydrogen attack. The recommended operating limits of hydrogen partial pressure and temperature accepted by the petroleum industry are presented in API Publication 941. During the last 3 years, the Exxon Corporation has found hydrogen attack of the carbon-0.5-molybdenum steels at hydrogen partial pressure and temperatures that were previously believed to be below the conditions required to cause attack. These experiences also demonstrated that a stress relief heat treatment will not necessarily prevent attack. This paper reviews these experiences and the preventive measures being taken by Exxon to minimize the probability of existing carbon-0.5-molybdenum steel equipment failure from hydrogen attack.
- Research Organization:
- Exxon Research and Engineering Company, Florham Park, New Jersey
- OSTI ID:
- 5196800
- Report Number(s):
- CONF-8205233-
- Journal Information:
- Proc., Am. Pet. Inst., Refin. Dep.; (United States), Journal Name: Proc., Am. Pet. Inst., Refin. Dep.; (United States) Vol. 61; ISSN PAPDD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBON STEELS
EMBRITTLEMENT
FLUIDS
GASES
HEAT TREATMENTS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROGEN EMBRITTLEMENT
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
PETROLEUM REFINERIES
RELAXATION
STEELS
STRESS RELAXATION