Effect of electropolishing on corrosion of Alloy 600 in high temperature water

Han, Yaolei; Mei, Jinna; Peng, Qunjia; Han, En‐Hou; Ke, Wei

doi:10.1016/j.corsci.2015.05.026

Cited by 37 publications

(19 citation statements)

References 32 publications

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“…2) shows that electropolished surfaces without mechanical defects (curves 2 and 4) have the highest resistance to pitting corrosion. Electrochemical polishing enabled the formation of a high quality Cr 2 O 3 passive film, which protects the steel surface in the whole passive region [11,15,16]. Appropriate polishing current density is a very important parameter for effectual surface finish.…”

Section: Discussionmentioning

confidence: 99%

“…The process of electrochemical polishing is a conventional chemical surface finish of metals, which results in a high surface quality with high surface brightness (mirror finish), an increase in corrosion resistance and a decrease in surface roughness [10,11,12]. The electropolishing process removes a particular layer from the metal surface.…”

Section: Introductionmentioning

confidence: 99%

“…That is why this treatment is mainly used in food, chemical, petrochemical, pharmaceutical, and medical industries. Electrochemical polishing in medicine is used mainly to polish surgical and ophthalmic devices and instruments and also joint replacements, jaw implants, and stents used in cardiology [10,11].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Surface Treatment on Corrosion Resistance of Austenitic Biomaterial

Zatkalíková

Oravcová

Palček

et al. 2018

TFAMENA

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SummaryThis paper focuses on the effect of surface treatment (grinding, electrochemical polishing) on the corrosion resistance of AISI 316L, a Cr-Ni-Mo low-carbon austenitic surgical stainless steel, in a physiological solution at the temperature of 37 °C. The influence of a surface defect and of sensitization by heat treatment on the corrosion behaviour of electrochemically polished surface is also studied. The evaluation is based on the results of cyclic potentiodynamic polarization tests and on the microscopic observation of specimen surfaces after performed tests. The analysis of cyclic potentiodynamic curves showed the highest pitting corrosion resistance of electrochemically polished specimens regardless of the previous sensitization. The as-received specimen showed the highest susceptibility to pitting, which was microscopically confirmed. Based on the performed experiments we can conclude that electrochemical polishing is an efficient chemical surface treatment to increase the resistance of AISI 316L to pitting corrosion; the resistance to pitting corrosion of electrochemically polished surface can by markedly decreased by the presence of mechanical defects; the as-received surface and the ground surface showed lower resistance to pitting corrosion than electrochemically polished ones; sensitization induced by heat treatment (700 °C/10 hours) does not decrease resistance to pitting corrosion.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Surface Treatment on Corrosion Resistance of Austenitic Biomaterial

Zatkalíková

Oravcová

Palček

et al. 2018

TFAMENA

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“…It may consist of a graded series of different oxides with one of more metal ions incorporated into the oxide lattice structure. Although oxide film formation on Inconel 600 has been investigated extensively [4][5][6][7][8][32][33][34][35][36][37][38][39][40][41][42][43], most of these studies were performed over a limited range of environmental conditions. For example, oxide film formation has been studied in neutral pH water at 325 • C [32], in highly acidic and basic solutions at 350 • C and 320 • C [33], respectively and in pure water at 288 • C [5].…”

Section: Introductionmentioning

confidence: 99%

Combined effect of gamma-radiation and pH on corrosion of Ni–Cr–Fe alloy inconel 600

Musa

Wren

2016

Corrosion Science

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“…Based on the SCC statistics identified in the French PWRs by Couvant et al [1], most of the cases were identified after a period of at least of 50000 hours. Literature results also indicate that the water chemistry [9][10][11], testing temperature [12], degree and paths of pre-strain [9,10,13,14] and surface finish [15][16][17] and heat treatment are the main factors that influence SCC. Furthermore, when austenitic stainless steels are exposed to high temperature water, a double layer structured oxide layer forms, which consists of a fine grained, compact, and chromium-rich inner oxide layer Kruska et al and Lozano-Perez suggest that the oxidation which preferentially occurs along the grain boundaries and slip bands could be one of the possible reasons for the occurrence of SCC.…”

Section: Introductionmentioning

confidence: 99%

Oxidation and SCC Initiation Studies of Type 304L SS in PWR Primary Water

Scenini¹,

Lindsay²,

Chang³

et al. 2017

The Minerals, Metals &Amp; Materials Series

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Slow strain rate tensile (SSRT) tests were conducted on conventional and tapered samples manufactured from forged Type 304L stainless steel to assess the stress corrosion cracking (SCC) behaviour in simulated PWR primary water. Several testing and microstructural parameters were investigated in order to explore the conditions under which crack initiation might occur. Surface preparation appeared to play a very important role on SCC initiation whereby the machined surfaces were the least susceptible to SCC initiation whilst oxide polishing suspension (OPS) polished surfaces were more susceptible. On the machined surfaces the cracks were always transgranular (TG) in nature and associated with the machining marks. Conversely, on fine polished surfaces with oxide polishing suspension the crack morphology was mainly intergranular in nature, although minor transgranular cracking was observed. The regions in the proximity of the ferrite/austenite interface were shown to be very susceptible to SCC initiation especially on the OPS polished surfaces and this was attributed to the strain localization upon dynamic deformation. Furthermore, intragranular inclusions appeared to dissolve and act as initiation sites for transgranular cracking to occur. The roles of strain rate, dynamic deformation and microstructure on the initiation of SCC are also discussed.

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Effect of electropolishing on corrosion of Alloy 600 in high temperature water

Cited by 37 publications

References 32 publications

The Effect of Surface Treatment on Corrosion Resistance of Austenitic Biomaterial

The Effect of Surface Treatment on Corrosion Resistance of Austenitic Biomaterial

Combined effect of gamma-radiation and pH on corrosion of Ni–Cr–Fe alloy inconel 600

Oxidation and SCC Initiation Studies of Type 304L SS in PWR Primary Water

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