Intergranular Corrosion Sensitivity of Welded Joint of Super304H at High Temperature

Ya Qing Chen; Jian Chen; Yan Jie Ren; Jian Lin Chen; Jian Jun He; Wei Qiu

doi:10.4028/www.scientific.net/KEM.732.50

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 732Intergranular Corrosion Sensitivity of Welded...

Intergranular Corrosion Sensitivity of Welded Joint of Super304H at High Temperature

Abstract:

AbstractThis paper investigated the effect of sensitization time (0h,5h,15h,30h)on intergranular corrosion sensitivity of welded joints of Super304H stainless steel at 650°C by electrochemical impedance spectroscopy (EIS), electrochemical potentiodynamic reactivation (EPR) method and scanning electron microscopy (SEM). EPR results showed that with the increase of sensitization time, the value of reactivation rate Ra increased. Electrochmical impedance spectra of welded joint of super304H for different sensitization time exhibited the similar characteristics. The fitted results showed that the values of R_fdecreased with the increase of sensitization time.

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Periodical:

Key Engineering Materials (Volume 732)

Pages:

50-54

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.732.50

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Online since:

March 2017

Authors:

Ya Qing Chen, Jian Chen*, Yan Jie Ren, Jian Lin Chen, Jian Jun He, Wei Qiu

Keywords:

Electrochemical Impedance Spectroscopy (EIS), Electrochemical Potentiodynamic Reactivation (EPR), Intergranular Corrosion Sensitivity, Welded Joint of Super304H

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