Investigation on the intergranular corrosion resistance of the AISI 316L(N) stainless steel after long time creep testing at 600 °C

Terada, Maysa; Escriba, D.M.; Costa, Isolda; Materna-Morris, E.; Padilha, Angelo Fernando

doi:10.1016/j.matchar.2007.05.017

Cited by 58 publications

(37 citation statements)

References 18 publications

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“…This behaviour is in agreement with the results obtained by other authors working with different stainless steels [50][51][52].…”

Section: Eis Measurementssupporting

confidence: 93%

“…These depleted areas (i.e. secondary austenite or secondary ferrite) may favour the formation of defects on the passive film that increase diffusion throughout the passive film [50][51][52]. Moreover, if the Cr content decreases to values below the threshold corresponding to autopassivation, these low Cr content zones may no longer correspond to a stainless steel and their local corrosion will be expected.…”

Section: Eis Measurementsmentioning

confidence: 99%

“…This more conductive layer could be related to defects that are a consequence of the areas depleted in alloying elements (secondary ferrite and secondary austenite) after the formation of intermetallic phases [50][51][52].…”

Section: Eis Measurementsmentioning

confidence: 99%

“…Thus, the increase in the conductivity of the passive film after the heat treatment may explain the greater susceptibility to pitting corrosion of the sensitised samples in the potentiodynamic curves [50][51][52]. In order to analyse the semiconductive properties of indicates that the oxide layer behave like n-type semiconductors [67,68]; this is associated with an outer oxide film mainly composed of iron oxides and hydroxides.…”

Section: Eis Measurementsmentioning

confidence: 99%

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Study of the sensitisation process of a duplex stainless steel (UNS 1.4462) by means of confocal microscopy and localised electrochemical techniques

Leiva-García

Fernandes²,

Muñoz-Portero

et al. 2015

Corrosion Science

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ElsevierLeiva García, R.; Fernandes, JS.; Muñoz-Portero, M.; Garcia-Anton, J. (2015). Study of the sensitisation process of a duplex stainless steel (UNS 1.4462 AbstractWhen duplex stainless steels are heated, they can become sensitised and intermetallic phases can appear. In this work, samples of duplex stainless steel, UNS 1.4462, have been heated (850 ºC for 1 and 2 hours) in a heating unit that can be accommodated to a confocal microscope in order to study the morphological changes in-situ. The electrochemical behaviour of the samples has been analysed by means of conventional and localised electrochemical techniques. According to the results, there is a general decrease in the steel resistance to localised corrosion; this decrease can be related to defects in the formed passive film.

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“…This behaviour is in agreement with the results obtained by other authors working with different stainless steels [50][51][52].…”

Section: Eis Measurementssupporting

confidence: 93%

Section: Eis Measurementsmentioning

confidence: 99%

Section: Eis Measurementsmentioning

confidence: 99%

Section: Eis Measurementsmentioning

confidence: 99%

See 2 more Smart Citations

Study of the sensitisation process of a duplex stainless steel (UNS 1.4462) by means of confocal microscopy and localised electrochemical techniques

Leiva-García

Fernandes²,

Muñoz-Portero

et al. 2015

Corrosion Science

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show abstract

“…The use of Nb, Ti, Zr and V as stabilizing elements delays the onset of sensitization due to the formation of carbides with these elements at higher temperature than chromium carbides with much less C available in solid solution. The outcome of the precipitation of carbides other than chromium carbides is an increase in IGC resistance 6,16,17) . In spite of the use of stabilizing elements, Hong et al 18) found the precipitation of chromium carbides in 347 ASS after hot deformation.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Electrolyte Composition in the Degree of Sensitization in AISI 347H Stainless Steel

et al. 2017

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This study evaluated the suitability of the depassivator in revealing low degrees of sensitization (DOS) in samples of wrought AISI 347H austenitic stainless steel in the as-received condition and solution heat treated (SHT) at 1050 C. Assessment of the electrolyte composition was performed by the double loop electrochemical potentiokinetic reactivation (DL-EPR) test at room temperature. The electrolyte 1.0M H 2 SO 4 + 0.50M HCl was found to be adequate for detecting low DOS. Microstructural characterization of the as-received material revealed the presence of Cr-rich carbides. These carbides were responsible of the susceptibility to IGC.

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Correlation between microstructure and corrosion behavior in an AISI 316L steel pipeline exposed for 100,700 h at 640°C in a petrochemical plant

Calderón-Hernández

Alves

Moraes

et al. 2021

Materials & Corrosion

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The microstructure and electrochemical properties of 316L stainless steel were investigated after two conditions: aged at 640°C for 100,700 h and solution annealed at 1050°C for 2 h. While the aged samples were obtained from a pipe of a petrochemical reactor plant that was in service, the solution annealing was carried out in a conventional laboratory furnace. After aging, the precipitates present in decreasing order of quantity were sigma, Laves phase, and M 23 C 6 . After solution annealing, the microstructure was full austenitic. These results were in agreement with equilibria phase simulation with Thermo-Calc software. Intergranular corrosion susceptibility, evaluated by means of the single loop electrochemical potentiokinetic reactivation technique and Practice A of ASTM 262, indicated a preponderant role for the sigma precipitate. The pitting potential (E pit ) was evaluated through potentiodynamic polarization curves in 0.6 M NaCl and electrochemical impedance spectroscopy was performed at the corrosion potential to complement the information about the corrosion resistance.

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Investigation on the intergranular corrosion resistance of the AISI 316L(N) stainless steel after long time creep testing at 600 °C

Cited by 58 publications

References 18 publications

Study of the sensitisation process of a duplex stainless steel (UNS 1.4462) by means of confocal microscopy and localised electrochemical techniques

Study of the sensitisation process of a duplex stainless steel (UNS 1.4462) by means of confocal microscopy and localised electrochemical techniques

Assessment of the Electrolyte Composition in the Degree of Sensitization in AISI 347H Stainless Steel

Correlation between microstructure and corrosion behavior in an AISI 316L steel pipeline exposed for 100,700 h at 640°C in a petrochemical plant

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