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Effect of stress on passivation kinetics and passivation modelling of 304L stainless steel in acidic medium

Communication sans acte
Auteur
MUBARAK, Hazem
211915 Mechanics surfaces and materials processing [MSMP]
VOLOVITCH, Polina
260669 Institut de Recherche de Chimie Paris [IRCP]
OGLE, Kévin
260669 Institut de Recherche de Chimie Paris [IRCP]
BARRALLIER, Laurent
211915 Mechanics surfaces and materials processing [MSMP]
ccJÉGOU, Sébastien
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/10934
Date
2015

Résumé

Stress Corrosion Cracking (SCC) is a typical failure of engineering materials applied in corrosive environments. In light water reactors for example, this results in loss of electrical capacity and related costs of repair and replacement. Film Rupture-dissolution Model explains interganular SCC as a phenomenon resulting from repetitive activation/passivation cycles (Fig.1). Activation takes place mechanically by slip-induced film breakdown which causes excessive material dissolution until it repassivates again. In this study, potentiodynamic cycling experiments serve effectively to perform in-Lab electrochemical simulation of this process. Conventional electrochemical techniques and Inductively Coupled Plasma – Optical Emission Spectroscopy are used to in-situ measure the corrosion transients and dissolution rates. A model was developed proving that stainless steel repassivates according to the High Field Ion Conduction Model in acidic solutions. Having this, quantification of the instantaneous passive film thickness and corrosion susceptibility of the passive film constructed over the surface has been successfully achieved (Fig.2). Quantified results showed that for stressed materials, the time to repassivation is longer, and the constructed passive film, though thicker, is more susceptible to corrosion than passive films developed over non-stressed materials.

Fichier(s) constituant cette publication

Nom:
MSMP_EUROPORR_jegou_2015
Taille:
2.258Mo
Format:
PDF
Description:
Poster
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  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)

Documents liés

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  • Crystallography of Stress corrosion cracking of austenitic stainless steel by scanning electron microscope and electron backscatter diffraction 
    Communication avec acte
    MUBARAK, Hazem; VOLOVITCH, Polina; OGLE, Kévin; BARRALLIER, Laurent; ccJÉGOU, Sébastien (2015)
    In this study, Stress Corrosion Cracking (SCC) produced for 304L austenitic stainless steel in different concentrations of chloride containing sulfuric acid solutions was analyzed using both Scanning Electron Microscope ...
  • Evolution of residual stresses during short time nitriding of 33CrMoV12-9 steel grade 
    Article dans une revue avec comité de lecture
    FALLOT, Guillaume; BARRALLIER, Laurent; ccJÉGOU, Sébastien (Trans Tech Publications, 2014)
    The evolution of residual stresses during short time gas nitriding of 33CrMoV12-9 steel grade is studied. It aims understanding the influence of nitriding parameters (temperature T and nitriding potential Kn) on the ...
  • Qualification of the damage induced by friction using X-ray Diffractometry 
    Communication sans acte
    FABRE, Agnès; BARRALLIER, Laurent; ccJÉGOU, Sébastien (2014)
    In a previous study, the capability of X-ray diffraction technique to qualify damage occurring during friction had been proven [1]. The purpose of this study is to complete this research in order to develop a method to ...
  • Influence of strain hardening on gaseous nitriding of steels 
    Communication avec acte
    GUILLOT, Benjamin; BARRALLIER, Laurent; ccJÉGOU, Sébastien (ASM International, 2016)
    Machining is known to introduce plastic straining and residual stress gradients in surface of mechanical parts. If not controlled, the mechanical state of a surface can influence adsorption and diffusion of atoms during ...
  • Fatigue Modelling for Gas Nitriding 
    Article dans une revue avec comité de lecture
    WEIL, Hadrien; ccJÉGOU, Sébastien; BARRALLIER, Laurent; COURLEUX, Alice; BECK, Guillaume (Università di Cassino, 2016)
    The present study aims to develop an algorithm able to predict the fatigue lifetime of nitrided steels. Linear multi-axial fatigue criteria are used to take into account the gradients of mechanical properties provided by ...

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