Adsorption mechanism of non-toxic organic inhibitors on steel in solutions at pH 8 determined by electrochemical quartz crystal microbalance measurements
✍ Scribed by H. Akrout; L. Bousselmi; E. Triki; S. Maximovitch; F. Dalard
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- German
- Weight
- 287 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0947-5117
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✦ Synopsis
Abstract
The adsorption on steel of two compounds, ascorbic acid salts (SA) and 1‐hydroxyethylidene,1‐diphosphonic acid salts (SHEDP), used alone or simultaneously, was studied using an electrochemical quartz crystal microbalance (EQCM). These products are considered to be non‐toxic organic corrosion inhibitors. SA adsorption was greater at cathodic potentials than at the corrosion potential, while SHEDP adsorbed better at the corrosion potential.
The effectiveness of these two inhibitors is discussed in relation to the polarization curves. Several hypotheses are discussed to explain the adsorption mechanism in the presence of the two compounds used either alone or together.