Open AccessElectrochemical and metallographic evaluation of alloys C-22 and 625
Author(s) -
Ajit K. Roy,
D.L. Fleming,
B.Y. Lum
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/576007
Subject(s) - microstructure , pitting corrosion , crevice corrosion , electrochemistry , chloride , corrosion , materials science , metallurgy , polarization (electrochemistry) , optical microscope , microscopy , chemistry , electrode , scanning electron microscope , composite material , optics , physics
Electrochemical cyclic potentiodynamic polarization (CPP) experiments were performed on Alloys C-22 and 625 to evaluate their susceptibility to localized corrosion in acidic brines of various salt content at 90{degrees}C. The microstructures of both tested and untested specimen`s were evaluated by optical microscopy. This paper presents the results showing the effect of chloride ion concentration on the pitting and crevice corrosion behavior of these alloys, and the relationship of the observed microstructures to the resulting surface degradation modes