Caustic Stress Corrosion of Fe-Cr-Ni Austenitic Alloys

Berge, Ph.; Donati, Joan; Prieux, B.; Villard, D.

doi:10.5006/0010-9312-33.12.425

Cited by 34 publications

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“…Af ter the tight en ing of the C-rings, the ap plied stress sta bi lised at the value known as the "in ter nal stress". The stud ies ef fec tu ated on Incoloy-800 showed that in prac tice the stress was sta bi lised at 80% of the the o ret i cal value [5].…”

Section: Ex Per I Men Talmentioning

confidence: 99%

Electro chemical studies on stress corrosion cracking of Incoloy-800 in caustic solution, part I: As received samples

Dinu¹,

Fulger²,

Ionescu³

et al. 2005

NUCL TECH RAD PROT

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Many non-volatile impurities accidentally introduced into the steam generator tend to Concentrate on its surface in restricted flow areas. In this way these impurities can lead to stress corrosion cracking (SCC) on stressed tubes of the steam generator. Such impurities can be strong alkaline or acid solutions. To evaluate the effect of alkaline concentrated environments on SCC of steam generator tubes, the tests were con ducted on stressed samples of Incoloy-800 in 10% NaOH solution. To accelerate the SCC process, stressed specimens were anodically polarised in a caustic solution in an electro chemical cell. The method of stressing of Incoloy-800 tubes used in our experiments was the C-ring. Using the cathodic zone of the potentiodynamic curves it was possible to calculate the most important electrochemical parameters: the corrosion current, the corrosion rate, and the polarization resistance. We found that the value of the corrosion potential to initiate the SCC microcracks was -100 mV. The tested samples were examined using the metallographic method. The main experimental results showed that the in crease of the stress state promoted the in crease of the SCC susceptibility of Incoloy-800 samples tested under the same conditions, and that the length of the SCC-type microcracks in creased with the growth of the stress value

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Section: Ex Per I Men Talmentioning

confidence: 99%

Electro chemical studies on stress corrosion cracking of Incoloy-800 in caustic solution, part I: As received samples

Dinu¹,

Fulger²,

Ionescu³

et al. 2005

NUCL TECH RAD PROT

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show abstract

“…The investigation on Ni-Cu based SG tube material has been limited as compared to Ni-Cr-Fe based alloy. In case of Ni-Cr-Fe based alloys, those considered as SG tube materials for pressurized water reactors (PWRs) systems are austenitic stainless steels (SSs), Alloy 600, Alloy 800 and Alloy 690 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. For Ni-Cu based alloy, Monel 400 was used as SG tubing in early CANDU reactors and Indian pressurized heavy water reactors (PHWRs) systems [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Corrosion aspects of Ni–Cr–Fe based and Ni–Cu based steam generator tube materials

Dutta

2009

Journal of Nuclear Materials

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Korrosionsprüfung bei gleichzeitiger mechanischer Beanspruchung—Rißbildende Korrosion

Spähn¹,

Wagner²,

Walter³

2001

Korrosion Und Korrosionsschutz

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Caustic Stress Corrosion of Fe-Cr-Ni Austenitic Alloys

Cited by 34 publications

References 0 publications

Electro chemical studies on stress corrosion cracking of Incoloy-800 in caustic solution, part I: As received samples

Electro chemical studies on stress corrosion cracking of Incoloy-800 in caustic solution, part I: As received samples

Corrosion aspects of Ni–Cr–Fe based and Ni–Cu based steam generator tube materials

Korrosionsprüfung bei gleichzeitiger mechanischer Beanspruchung—Rißbildende Korrosion

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