Mechanism of the intergranular corrosion of cast nickel-chromium-molybdenum alloy

Lev, V. Z.

doi:10.1007/bf01146753

Cited by 2 publications

(2 citation statements)

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“…High-temperature, high-pressure environments containing with sulfide (H 2 S) and high chlorine ion increasingly challenge the ability to service these wells using carbon steel or low alloy steel casing and tubing. The microstructure and microchemistry affect the intergranular corrosion (IGC) and stress corrosion cracking of nickel base alloys [9][10][11][12][13][14][15][16][17][18] . For decades nickel base alloys have been successfully used in highly corrosive wells, consistent with their for the superior corrosion resistance and excellent mechanical properties [1][2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

The Effect of Precipitates on Corrosion Resistance of Alloy 28 Tubing in Sour Environments

Li¹,

Xiang²,

Chen³

et al. 2015

CORROSION

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Complete List of Authors: Li, Cheng-yong xiang, zuping chen, zhonghua zhang, ran Abstract: N08028 alloy, an important candidate corrosion-resistant material used for down-hole tubing in the severe corrosive environment, was investigated for the characteristics of precipitate and their effect on corrosion resistance. The microstructure of the precipitates was observed by the optical microscope and scanning election microscopy (SEM), and the type and chemical composition were analyzed by X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS). The precipitates rich in C, Cr and Mo in N08028 alloy, which are mostly σ phase and Cr 23 C 6 . The corrosion resistance of N08028 alloy with precipitates had lower intergranular corrosion and stress corrosion cracking resistance than without precipitates.

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Section: Introductionmentioning

confidence: 99%

The Effect of Precipitates on Corrosion Resistance of Alloy 28 Tubing in Sour Environments

Li¹,

Xiang²,

Chen³

et al. 2015

CORROSION

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“…The microstructure and microchemistry affect the intergranular corrosion of nickel-based alloys. [7][8][9][10][11][12][13][14] Similarly, the detrimental phases may promote stress corrosion cracking (SCC). Alloy 28 has high performance and a much lower price than other nickel-based alloys such as G3, 825, 625, and so on.…”

Section: Introductionmentioning

confidence: 99%

Technical Note:Microstructure Effects in the Stress Corrosion Cracking of Alloy 28 Under Sour Conditions

Ning¹,

Ming²,

Fang³

et al. 2012

CORROSION

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Alloy 28 (UNS N08028), an important candidate material for sour gas well service, was investigated for sensitivity to stress corrosion cracking under a sour environment simulating the down-hole service conditions. Three different heat samples were tested, and their microstructure was observed with an optical microscope and scanning electron microscopy (SEM); microchemistry was analyzed using energy-dispersive spectroscopy (EDS). Specimens with precipitates from heat A failed in stress corrosion cracking (SSC) testing, and their specimens without precipitates from heats B and C did not. The precipitated phase was rich in carbon, chromium, and molybdenum, and with high hardness. Some microcracks were observed around the platelet precipitates. The microstructure had a remarkable effect on the SCC of Alloy 28 under sour conditions, so the optimum microstructure was the key to Alloy 28 use in sour service conditions.

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Mechanism of the intergranular corrosion of cast nickel-chromium-molybdenum alloy

Cited by 2 publications

References 1 publication

The Effect of Precipitates on Corrosion Resistance of Alloy 28 Tubing in Sour Environments

The Effect of Precipitates on Corrosion Resistance of Alloy 28 Tubing in Sour Environments

Technical Note:Microstructure Effects in the Stress Corrosion Cracking of Alloy 28 Under Sour Conditions

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