Electrochemical potentiokinetic reactivation behavior of alloy 182 weld metal

Wen Ta Tsai, Chi Lu Yu, Jeih Ing Lee

Research output: Contribution to conferencePaperpeer-review

Abstract

The susceptibility to intergranular corrosion of Alloy 182 weld metal was evaluated by conducting double-loop electrochemical potentiokinetic reaction (DL-EPR) tests in H 2SO 4 + CH 3CSNH 2 solutions. Three different heat treatments, namely 400°/200h (low temperature annealing, LTA), 621°C /24h (stress relief, SR), and 621°C /24h + 400°C /200h (SR + LTA), were applied to the weld metal. The effect of heat treatment on the degree of sensitization (DOS) of Alloy 182 weld metal was explored. The experimental results showed that the composition of the electrolyte used in DL-EPR test greatly affected the ability to differentiate the DOS of Alloy 182 weld metal. Transmission electron microscopy (TEM) coupled with energy dispersive spectroscopy (EDS) was also employed to identify the types of precipitates and to analyze the chemical composition change along the grain boundaries of Alloy 182 weld.

Original languageEnglish
Publication statusPublished - 2004 Dec 1
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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