Effects of hydrotalcite intercalated with corrosion inhibitor on cathodic disbonding of epoxy coatings
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- 作者：To Thi Xuan Hang ; Nguyen Thuy Duong…
- 关键词：Epoxy coatings ; Hydrotalcite ; Corrosion inhibitors ; Release ; Cathodic disbonding ; Corrosion protection
- 刊名：Journal of Coatings Technology and Research
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：12
- 期：2
- 页码：375-383
- 全文大小：944 KB
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- 刊物主题：Chemistry
Tribology, Corrosion and Coatings
Surfaces and Interfaces and Thin Films
Polymer Sciences
Materials Science- 出版者：Springer US
- ISSN：1935-3804
文摘
In this study, zinc aluminum hydrotalcite intercalated with 2-benzothiazolylthio-succinic acid (BTSA) as a container of corrosion inhibitor was prepared and incorporated in an epoxy coating. The HT-BTSA obtained was characterized using infrared spectroscopy and X-ray diffraction. BTSA release from HT-BTSA in 0.5?M NaCl solution was investigated using UV–Vis spectroscopy. The corrosion protection performance of the epoxy coating containing HT-BTSA was evaluated and compared to the pure epoxy coating and the epoxy coating containing HT by cathodic disbonding test, electrochemical impedance spectroscopy, salt spray test, and adhesion measurement. It was shown that the BTSA was intercalated in hydrotalcite and its loading was about 33.5%. The BTSA release from HT-BTSA increased with the pH of the?NaCl solution. It was also shown that the presence of HT or HT-BTSA in epoxy coating improved the resistance to cathodic disbonding and the adhesion of the epoxy coating. Corrosion protection performance of epoxy coating containing HT-BTSA was higher than that of epoxy coating containing HT.