An in situ FT-IR evaluation of candidate organic corrosion inhibitors for carbon steel in contact with alkaline aqueous solutions

✍ Scribed by B. Bozzini; C. Mele; V. Romanello

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: German
• Weight: 292 KB
• Volume: 58
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.200604015

✦ Synopsis

Abstract

The influence of some organic additives on the anodic behaviour of a carbon steel electrode in contact with alkaline aqueous solutions was studied by in situ Fourier transform infrared (FT‐IR) spectroscopy. FT‐IR spectroscopy allows to obtain information at the molecular level regarding the metal‐electrolyte interface. The following molecules have been considered: (i) benzyldimethylphenylammonium chloride (BDMPAC), (ii) glutamic acid, (iii) triethylenetetramine (TETA), (iv) sodium tartrate and (v) sodium benzoate. Potential‐dependent spectra have been recorded for the different investigated systems. Quantitative information about the formation kinetics of corrosion products was derived by numerical analysis of the peak area as a function of the applied potential for the different systems investigated.