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Corrosion-fatigue of carbon steels in sweet and sour corrosion environments: Analysis of cyclic elastic and plastic strain effects on the electrochemical behavior by a transient corrosion current method
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
Mines Saint-Etienne, France.
Mines Saint-Etienne, France.
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
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2017 (English)In: NACE - International Corrosion Conference SeriesVolume 5, 2017, Pages 3564-3578Corrosion Conference and Expo 2017; New Orleans; United States; 26 March 2017 through 30 March 2017., National Assoc. of Corrosion Engineers International , 2017, p. 3564-3578Conference paper, Published paper (Refereed)
Abstract [en]

The effects of cyclic stress and strain on corrosion-fatigue in sweet and sour corrosion were studied with an electrochemical approach. Cold-drawn and cold rolled carbon steel samples were mechanically cycled in a confined and CO2-saturated synthetic seawater solution, and their electrochemical response was acquired with a classic 3-electrode apparatus. The effect of elastic static stress was evaluated with the Linear Polarization Resistance (LPR) method. The effect of dynamic stresses, strain rate and plastic strain were evaluated by a potentiostatic method, at imposed steady-state Open Circuit Potential (OCP). Both methods show a linear dependency of the work electrode potential with respect to the applied stress. The latter method allowed the detection of an anodic contribution, proportional to the plastic deformation and to the strain rate. Using these findings, a time-domain model was built, in the form of a RLC circuit, associated to the electrochemical behavior. The calculations show a good agreement with the experimental results, and support the detected influences of stress, strain rate and plastic strain.

Place, publisher, year, edition, pages
National Assoc. of Corrosion Engineers International , 2017. p. 3564-3578
Keywords [en]
Corrosion-fatigue, Electrochemistry, Stress enhanced corrosion, Time-domain modelling, Carbon steel, Cold rolling, Corrosion fatigue, Metal cladding, Plastic deformation, Resonant circuits, Steel sheet, Strain rate, Time domain analysis, Cold rolled carbon steels, Electrochemical behaviors, Electrochemical response, Electrode potentials, Linear polarization resistance, Open circuit potential, Potentiostatic methods, Time domain, Corrosion
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40014Scopus ID: s2.0-85027870448ISBN: 9781510840348 (print)OAI: oai:DiVA.org:ri-40014DiVA, id: diva2:1361323
Conference
NACE - International Corrosion Conference Series Volume 5, 2017, Pages 3564-3578 Corrosion Conference and Expo 2017; New Orleans; United States; 26 March 2017 through 30 March 2017
Available from: 2019-10-15 Created: 2019-10-15 Last updated: 2019-10-15Bibliographically approved

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