Hydrogen assisted cracking and inhibition of spring alloys in acidizing solutions

Book · Sat Dec 31 00:00:00 EST 1994

OSTI ID:70068

Coyle, W R; Chitwood, G B; Rice, P W ^[1]; Walker, M L ^[2]

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1. Halliburton Energy Systems, Dallas, TX (United States)
2. Halliburton Energy Services, Duncan, OK (United States)

Several experiments were conducted to investigate and compare the hydrogen assisted cracking resistance of high strength, corrosion resistant spring alloys to acidizing fluids. Two cobalt-based alloys, UNS R30035 and UNS R30003, and one nickel-based alloy, UNS N07750, were evaluated. The tests involved exposing stressed spring segments of all alloys and C-rings of R30035 to uninhibited 28% HCl, 28% HCl with two different inhibitors, and the NACE TM0177 solution. Failures of N07750 spring segments in the uninhibited acid parallel field performance of this alloy. There were no failures of the R30035 or R30003 spring segments in the environments tested. Springs made from N07750 are more susceptible to hydrogen embrittlement than either R30035 or R30003. The C-ring tests of R30035 revealed the benefit of corrosion inhibition as a means of elevating the threshold cracking stress and increasing the time to failure in corrosive media. A strong beneficial effect of elevated-temperature thermal processing was observed for UNS R30035. High performance acidizing inhibitors are required in order to provide effective protection to high alloy spring materials.

• OSTI ID: 70068
• Report Number(s): CONF-940222-; TRN: IM9529%%407
• Resource Relation: Conference: Corrosion 94: National Association of Corrosion Engineers (NACE) international annual conference, Baltimore, MD (United States), 28 Feb - 4 Mar 1994; Other Information: PBD: 1994; Related Information: Is Part Of Corrosion/94 conference papers; PB: 5005 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
02 PETROLEUM
OIL WELLS
CORROSION RESISTANT ALLOYS
ACIDIZATION
SPRINGS
FIELD PRODUCTION EQUIPMENT
COBALT ALLOYS
HYDROGEN EMBRITTLEMENT
CHROMIUM ALLOYS
IRON ALLOYS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
INCONEL X750
HYDROCHLORIC ACID
CORROSION INHIBITORS
HEAT TREATMENTS
CHEMICAL COMPOSITION
LIQUID PENETRANT INSPECTION
EXPERIMENTAL DATA