Effect of the electrolyte composition on the electrochemical reactivation behavior of alloy 182 weld

Tsung Feng Wu, Wen-Ta Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Electrochemical potentiokinetic reactivation (EPR) tests are used to evaluate the degree of sensitization (DOS) of Alloy 182 weld. The validity of EPR test to detect DOS of nickel based alloys strongly depends on the electrolyte composition employed. In this investigation, the effects of electrolytes and their concentrations on the reactivation behaviors of Alloy 182 weld were investigated by conducting single-loop EPR (SL-EPR) tests. The experimental results showed that the anodic reactivation peak consisted of the contributions from grain boundaries corrosion, pitting corrosion and matrix dissolution, depending on the value of DOS of Alloy 182 weld. With proper adjustment of constituents (ex: CH 3CSNH 2 or NH 2CSNH 2) and their concentrations in 0.05 M H 2SO 4 solution, the contribution from grain boundary corrosion can be distinguished from the matrix and localized corrosion for the sensitized Alloy 182 weld.

Original languageEnglish
Title of host publicationEUROCORR 2004 - European Corrosion Conference
Subtitle of host publicationLong Term Prediction and Modelling of Corrosion
Publication statusPublished - 2004
EventEuropean Corrosion Conference: Long Term Prediction and Modelling of Corrosion, EUROCORR 2004 - Nice, France
Duration: 2004 Sep 122004 Sep 16

Other

OtherEuropean Corrosion Conference: Long Term Prediction and Modelling of Corrosion, EUROCORR 2004
CountryFrance
CityNice
Period04-09-1204-09-16

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

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