SCC behavior and anodic dissolution of Inconel 600 in low concentration thiosulfate

Hsu, S.S.; Tsai, S. H.; Jia, Kai; Tsai, Chung-Hung

doi:10.1016/0022-3115(91)90499-w

Cited by 15 publications

(8 citation statements)

References 11 publications

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“…Thiosulfate is considered to be a very aggressive species, and can cause environmental degradation of a variety of structural materials 1, 7,[12][13][14][15][16][17][18][19] . Thiosulfate is considered to be a very aggressive species, and can cause environmental degradation of a variety of structural materials 1, 7,[12][13][14][15][16][17][18][19] .…”

Section: Introductionmentioning

confidence: 99%

Role of Thiosulfate in the Corrosion of Steels: A Review

Choudhary¹,

Macdonald²,

Alfantazi³

2015

CORROSION

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Thiosulfate salts have been known to be dangerous corrosion promoters for over 30 years, when present under typical service conditions. This paper reviews the role of thiosulfate anion in causing localized corrosion and/or stress corrosion cracking of steels. Electrochemical and mechanical aspects associated with the pitting and stress corrosion cracking of steels in thiosulfate-containing environments are thoroughly discussed and reviewed. In particular, results

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Section: Introductionmentioning

confidence: 99%

Role of Thiosulfate in the Corrosion of Steels: A Review

Choudhary¹,

Macdonald²,

Alfantazi³

2015

CORROSION

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“…Most of the data were obtained from U-bend tests, slow strain rate tests, constant load, and constant extension tests using nonprecracked specimens under steady stress conditions. [5][6][7][8][9][10] However, the crack propagation rate in the above alloy/environment system seldom has been reported. Recently, Tsai, et al, used a constant deflection technique incorporating a precracked specimen to determine the SCC growth rate in sensitized alloy 600 in a thiosulfate solution under applied potential conditions.…”

Section: Introductionmentioning

confidence: 97%

Corrosion Fatigue Crack Growth Rate in Sensitized Alloy 600 in Thiosulfate Solution at Room Temperature

Tsai

Kuoh

1999

CORROSION

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Corrosion fatigue crack growth (FCG) behavior of alloy 600 (UNS N06600) sensitized at 1,100°C/0.5 h + 700°C/5 h in 0.1 M sodium thiosulfate (Na 2 S 2 O 3 ) solution at room temperature under applied anodic potential conditions was investigated using the fracture mechanics technique. Results indicated the FCG rate depended upon the testing frequency and the applied potential. At a frequency of 1 Hz, FCG rates were independent of applied potential and nearly the same as those tested in a N 2 atmosphere. However, at a frequency of 0.1 Hz, the FCG rate increased with increasing applied potential. Moreover, the competition between environmental and mechanical effects influenced the fracture morphology of the corrosion fatigue of sensitized alloy 600.

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“…Potentiodynamic polarization tests provide useful information such as corrosion rate and susceptibility of materials to corrosion in aqueous solutions, as well as pitting corrosion. Furthermore, it has been reported that polarization behaviors of Alloy 600 and stainless steels are associated with IGA and SCC [12][13][14]. In this case, however, additional IGA and SCC tests should be performed to find a correlation at applied potentials selected from a polarization curve.…”

Section: Introductionmentioning

confidence: 99%

Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures

2020

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This study aims to investigate the molar ratio effect of sodium to chloride ions on the corrosion of an Alloy 600 steam generator tube and an SA508 tubesheet material. The corrosion behavior was evaluated in solutions with three different molar ratios of sodium to chloride ions using a potentiodynamic polarization method. The corrosion potentials and corrosion rates of both the two materials were significantly decreased as the molar ratio increased from 0.1 to 10. Therefore, it is recommended that the molar ratio control to a value of 1 is beneficial only when the crevice chemistry has a low molar ratio with an acidic pH. The corrosion potentials and corrosion rates were little affected by the total sodium and chloride ion concentrations. SA508 acted as an anode and its corrosion rate was accelerated by galvanic coupling with Alloy 600.

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SCC behavior and anodic dissolution of Inconel 600 in low concentration thiosulfate

Cited by 15 publications

References 11 publications

Role of Thiosulfate in the Corrosion of Steels: A Review

Role of Thiosulfate in the Corrosion of Steels: A Review

Corrosion Fatigue Crack Growth Rate in Sensitized Alloy 600 in Thiosulfate Solution at Room Temperature

Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures

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