Tannin-based inhibitive pigment for sustainable epoxy coatings formulation

被引：12
|
作者：
Lamprakou, Zoi [1 ]
Bi, Huichao [1 ]
Weinell, Claus Erik [1 ]
Dam-Johansen, Kim [1 ]
机构：
[1] Tech Univ Denmark DTU, Dept Chem & Biochem Engn, CoaST, Bldg 229, DK-2800 Lyngby, Denmark
来源：
PROGRESS IN ORGANIC COATINGS | 2022年 / 167卷
关键词：
Corrosion; Tannins; Calcium tannate; Epoxy coating; EIS; CORROSION PROTECTION; STEEL CORROSION; MANGROVE TANNINS; MIMOSA TANNIN; ALKYD PAINTS; CARBON-STEEL; MILD-STEEL; PHOSPHATE; ACID; ZINC;
D O I：
10.1016/j.porgcoat.2022.106841
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Calcium tannate was synthesized, characterized, and dispersed into an epoxy coating as an inhibitive pigment. Electrochemical Impedance Spectroscopy (EIS) was employed to monitor the anti-corrosive performance of the coating formulated with the as-prepared pigment after exposure to the salt spray chamber. Reference coatings with the commercial calcium phosphate pigment and unpigmented coating were also evaluated for comparison reasons. EIS results showed that epoxy coating pigmented with calcium tannate has higher coating impedance after 21 days of exposure compared with reference coatings, either unpigmented or calcium phosphate pigmented coatings. XPS analysis was employed for a deeper understanding of the inhibitive action of calcium tannate towards corrosion protection and verified the incorporation of tannate molecules in the protective film formed on the steel substrate under the calcium tannate pigmented coating.
引用
收藏
页数：14
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