The stress corrosion crack growth rate in sensitized alloy 600 in thiosulfate solution

Tsai, W.-T.; Sheu, M.‐J.; Lee, J.-T.

doi:10.1016/0010-938x(96)00097-2

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…It has been shown that sensitized alloy 600 sustains SCC in S 2 O 3 2and S 4 O 6 2-solutions. [1][2][3][4][5][6][7][8][9][10][11] However, there are presently no explanations for the roles of sulfur species in various valences as they affect passivity or produce SCC, although several authors have proposed different hypotheses. [12][13][14] Furthermore, the "reduced sulfur effect" (valences < +6) on SCC of alloy 600 has been studied mainly in the sensitized condition.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Valence of Sulfur on Passivation of Alloys 600, 690, and 800 at 25°C and 95°C

Fang¹,

Staehle²

1999

CORROSION

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Effects of the valence of sulfur, as sulfur oxyanions and sulfide (S 2or HS -), on passivation of alloys 600, 690, and 800 (UNS N06600, N06690, and N08800) in various heat treatments were studied at 25°C and 95°C using potentiodynamic polarization. Effects of scanning rate, sulfur valence, pH, alloy composition, and heat treatment were investigated. In general, stability of passive films was found to decrease with the decrease of sulfur valence from +6 to -2. Alloy 690 in the thermally treated condition tended to be more stable than the various heat treatments of alloys 600 and 800, with some exceptions. Examination of surfaces after polarization over the potential range showed intergranular corrosion occurred mainly in solutions of sulfate (SO 4 instability of protective films was assessed using a stress corrosion cracking (SCC) parameter (P SCC ) that incorporates the ratio of current densities obtained in fast and slow potentiodynamic scans. The relationship of P SCC to the possible occurrence of SCC was discussed.

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Section: Introductionmentioning

confidence: 99%

Effects of the Valence of Sulfur on Passivation of Alloys 600, 690, and 800 at 25°C and 95°C

Fang¹,

Staehle²

1999

CORROSION

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“…The SA2, SA2+SEN, and SA2+TT specimens have similar grain size. Many works [28][29][30][31] showed that Cr content at the grain boundary was lower in the SA2+SEN specimen than in SA2. Grain boundary chromium is accompanied by integranualr carbide precipitation.…”

Section: ) Effect Of Serrated Grain Boundarymentioning

confidence: 99%

Effects of Grain Boundary Morphologies on Stress Corrosion Cracking of Alloy 600

Kim

Choi

Kim

et al. 2017

Archives of Metallurgy and Materials

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Effects of grain boundary morphologies on stress corrosion cracking (SCC) of Alloy 600 have been studied in 40% NaOH at 315°C using C-ring specimens. The configuration of the grain boundary and the intergranular carbide density were controlled by heat treatment. SCC tests were performed at +150 mV above the corrosion potential. The specimen with a serrated grain boundary showed higher SCC resistance than that with a straight grain boundary. This appears to be caused by the fact that the specimen with the serrated grain boundary has longer SCC path. SCC resistance also increased with intergranular carbide density probably due to enhanced relaxation of stress at intergranular carbide.

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“…9,10 It is used in new areas like steam-generator tubing and other hightemperature corrosive environments. Alloy 600 is not completely resistant to different types of corrosion, depending on the environment, in which it is used, 11 the structural property 12 and the atmosphere, to which it is exposed. 13 One of the reasons for this is its lower percentage of chromium, which is 15 % of its weight.…”

Section: Introductionmentioning

confidence: 99%

Effect of PCGTAW on the Inconel 690 alloy with respect to microsegregation attainment in comparison with the base metal processed with autogenous welding

Sivalingam¹,

Sureshkannan²

2019

Mater. Tehnol.

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The mechanical properties and microstructure of weldments are always an imperative concern of researchers; therefore, the change from continuous gas tungsten arc welding (GTAW) to pulsed-current gas tungsten arc welding (PCGTAW) was investigated for alloy 690, using the autogenous welding method. The mechanical properties like the tensile strength and impact were examined for both variants (continuous and pulsed-current gas tungsten arc welding). The microstructure was the susceptible parameter, revealing a complete formation of the weldments. Hence, a complete analysis with an optical microscope of up to 400 μm and a SEM of up to 7000 μm was performed during the described examination. This analysis showed that the formation of the secondary phase was negligible in the case of the pulsed-current method, which was superior to the gas tungsten arc welding, exhibiting a tensile strength of 641 MPa and an impact strength of 66 J.

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The stress corrosion crack growth rate in sensitized alloy 600 in thiosulfate solution

Cited by 14 publications

References 12 publications

Effects of the Valence of Sulfur on Passivation of Alloys 600, 690, and 800 at 25°C and 95°C

Effects of the Valence of Sulfur on Passivation of Alloys 600, 690, and 800 at 25°C and 95°C

Effects of Grain Boundary Morphologies on Stress Corrosion Cracking of Alloy 600

Effect of PCGTAW on the Inconel 690 alloy with respect to microsegregation attainment in comparison with the base metal processed with autogenous welding

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