| Résumé : |
I was privileged to receive an advance copy of the paper by Tiu et al on improved corrosion protection with organic corrosion inhibitors that appears in this issue of JCT CoatingsTech. I would have liked more information on the chemistry of the inhibitors, but was pleased to see that progress was being made regarding the use of organic inhibitors in coatings. I also liked the authors' test scheme.
The reason for my initial interest in the paper was that over 30 years ago, I was involved in a project to develop organic inhibitors for coatings on steel. Our best inhibitor was effective at reducing corrosion, but failed on two counts: an inability to consistently pass humidity testing (due to being too water soluble) and a difficulty in scaling up its synthesis (it gelled in the reactor, something not popular with the engineers). We did learn that inhibitor water solubility could be greatly reduced by adsorbing inhibitors onto silica particles. Our best inhibitor still was effective, but the adsorption part of the technology was covered by an extremely broad patent not even aimed at coatings. Royalties would have driven costs too high. Since we were a physical chemistry group, rather than one empowered to do synthesis, we were not encouraged to go further. Ironically, at least one of the materials later was a success as a corrosion inhibitor, but for use in water in cooling towers, not in coatings. |
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Corrosion inhibitors in COATINGS TECH, Vol. 13, N° 8 (08/2016)
