An in situ optical second harmonic generation study of carbon steel in contact with an alkaline aqueous solution containing glutamic acid

✍ Scribed by B. Bozzini; L. D'Urzo; C. Lin

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: German
• Weight: 115 KB
• Volume: 59
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.200804096

✦ Synopsis

Abstract

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.