Waterborne corrosion-resistant hydrophobic alkyd resin composite coatings modified with fluorinated acrylate–siloxane and submicron-sheet zinc phosphate pigment
| Autor: | Shenjie Zhong, Kang Qin, Ying Cai, Lingmin Yi, Yi Hou, Tianqi Xu |
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| Rok vydání: | 2021 |
| Předmět: |
Acrylate
Materials science Carbon steel Alkyd Composite number Zinc phosphate Surfaces and Interfaces General Chemistry engineering.material Surfaces Coatings and Films Corrosion chemistry.chemical_compound Colloid and Surface Chemistry Coating chemistry Chemical engineering visual_art Siloxane engineering visual_art.visual_art_medium |
| Zdroj: | Journal of Coatings Technology and Research. 18:1309-1320 |
| ISSN: | 1935-3804 1547-0091 |
| Popis: | Waterborne polymeric coating for corrosion protection has been of particular interest both in academia and industrial circles for years because of its low cost and low-volatile organic compound (VOC) emissions. However, organic coating is permeable to water and oxygen resulting in the reduction of anticorrosion properties during coating application. In this study, waterborne corrosion-resistant hydrophobic-modified alkyd resin composite coatings using fluorinated acrylate–siloxane (FASAR) and submicron-sheet zinc phosphate (Zn3(PO4)2) pigment were prepared. The results of hydrophobicity, thermal, and mechanical measurements indicated that the FASAR30/5%Zn3(PO4)2 had excellent performance. More importantly, the EIS and potentiodynamic polarization tests revealed that the acquired films also exhibited high anticorrosion property for carbon steel. The corrosion current density (icorr) was 7.20 × 10−7 A cm−2, with an inhibition efficiency of 99.92%, and a corrosion rate of 8.37 × 10−3 mm per year. On the other hand, the impedance modulus (Zf = 0.01 Hz) of FASAR30/5%Zn3(PO4)2 still had 5.68 × 104 Ω cm2 after 14-day immersion in the 3.5 wt% NaCl solution. |
| Databáze: | OpenAIRE |
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