Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7106377 | Progress in Organic Coatings | 2016 | 11 Pages |
Abstract
Hydrotalcites intercalated with two different corrosion inhibitors: 2-benzothiazolythio-succinic acid (BTSA) and benzoate (BZ) were prepared by coprecipitation method and incorporated (1.5Â wt.%) in solvent free epoxy coatings. The obtained hydrotalcites were characterized using infrared spectroscopy, X-ray diffraction, scanning electron microscopy and zeta potential measurements. The solid suspensions in epoxy resin were characterized by rheology and Turbiscan. The corrosion protection performance of the epoxy coating containing hydrotalcites applied on carbon steel was evaluated by electrochemical impedance spectroscopy, salt spray test and adhesion measurement. It was shown that the BTSA and BZ were intercalated in hydrotalcite and their loading was about 22Â wt.% and 27Â wt.%, respectively. The presence of BZ modified hydrotalcite (HT-BZ) improved significantly the corrosion protection of solvent free epoxy coating. Corrosion protection performance of epoxy coating containing HT-BZ was higher than that of epoxy coating containing BTSA modified hydrotalcite (HT-BTSA). The corrosion protection performance of coatings appears to depend on the dispersion degree of hydrotalcite particles in the epoxy matrix and the solubility of organic inhibitor in the electrolyte.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Nguyen Thuy Duong, To Thi Xuan Hang, Arnaud Nicolay, Yoann Paint, Marie-Georges Olivier,