Corrosion of Alloy 690 in Simulated Steam Generator Crevices: Effect of Applied Potential, pH and Pb Addition | Zendy

Iva Betova | Zendy; Martin Bojinov | Zendy; Tiina Ikäläinen | Zendy; Timo Saario | Zendy; Konsta Sipilä | Zendy

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Corrosion of Alloy 690 in Simulated Steam Generator Crevices: Effect of Applied Potential, pH and Pb Addition

Author(s) -

Iva Betova,

Martin Bojinov,

Tiina Ikäläinen,

Timo Saario,

Konsta Sipilä

Publication year - 2022

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1945-7111/ac4f26

Subject(s) - corrosion , dielectric spectroscopy , alloy , materials science , anode , electrochemistry , cyclic voltammetry , analytical chemistry (journal) , x ray photoelectron spectroscopy , metallurgy , chemistry , electrode , chemical engineering , environmental chemistry , engineering

The mechanism of general corrosion of Alloy 690 in simulated steam generator crevices is investigated by voltammetry, electrochemical impedance spectroscopy and slow strain rate tests, combined with ex-situ characterization of the oxides using X-ray photoelectron and Glow-discharge optical emission spectroscopies. Quantitative interpretation of impedance spectra with the Mixed-Conduction Model furnishes estimates of kinetic and transport parameters of the corrosion and anodic oxidation processes. The results indicate a beneficial effect of Pb addition on general corrosion regardless of crevice solution composition.

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