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An in situ optical second harmonic generation study of carbon steel in contact with an alkaline aqueous solution containing glutamic acid
Author(s) -
Bozzini B.,
D'Urzo L.,
Lin C.
Publication year - 2008
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200804096
Subject(s) - carbon steel , corrosion , materials science , aqueous solution , electrolyte , electrochemistry , second harmonic generation , electrode , in situ , carbon fibers , corrosion inhibitor , chemical engineering , metallurgy , composite material , chemistry , optics , organic chemistry , laser , physics , engineering , composite number
In this paper we report a spectroelectrochemical investigation—relevant to the elucidation of rebar corrosion processes—based on in situ optical second‐harmonic generation spectroscopy. We studied the corrosion behaviour of a carbon steel electrode in contact with an alkaline aqueous solution—simulating the electrolyte of freshly prepared cement paste—containing glutamic acid, a candidate corrosion inhibitor 1. The non‐linear time‐dependent optical response to exciting radiation at 1064 nm has been recorded as a function of applied potential. This approach allows to obtain detailed information regarding the dynamic electronic structure of the corrosion interface, which is not available from other electrochemical or spectroelectrochemical approaches.