Corrosion protection performance of nanoparticle incorporated epoxy paint assessed by linear polarization and electrochemical impedance spectroscopy
Corrosion protection performance of nanoparticle incorporated epoxy paint assessed by linear polarization and electrochemical impedance spectroscopy
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DOI：
10.1002/maco.201709563
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发表时间：
2018-04-01
影响因子：
1.8
通讯作者：
Assefi, Mohammad
中科院分区：
文献类型：
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作者：
Torknezhad, Yaghoob;Khosravi, Mohsen;Assefi, Mohammad
将环氧涂料与相对于硬化剂和未干燥的环氧树脂的总重量为1、2和3wt%的Al2O3（α）、Fe2O3（α）、SiO2和ZnO纳米颗粒均匀地结合，并涂覆在碳钢试样上。采用线性扫描伏安法（LSV）和电化学阻抗谱（EIS）对样品在3wt%NaCl溶液中的腐蚀防护性能进行了评价。LSV数据的分析和EIS数据的全面分析显示了所有类型的纳米颗粒在1重量%时的有益效果。对于2和3重量%的样品，性能是不同的，这取决于纳米颗粒类型。然而，在所有测试样品中，含有3wt%Al2O3（α）的样品显示出最好的性能。结果与纳米颗粒通过降低干燥环氧涂料的孔隙率来阻挡腐蚀涂层的能力相关。
Epoxy paint was homogeneously incorporated with Al2O3(alpha), Fe2O3(alpha), SiO2, and ZnO nanoparticles at 1, 2, and 3 wt% with respect to total weight of hardener and undried epoxy, and coated on carbon steel coupons. Corrosion protection performance of the samples was evaluated by linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) in 3 wt% NaCl solution. Analysis of LSV data and thorough analysis of EIS data showed the beneficial effect of all types of nanoparticles at 1 wt%. For 2 and 3 wt% samples, performance was different, depending on the nanoparticle type. However, the sample containing 3 wt% Al2O3(alpha) showed the best performance among all the tested samples. The results were correlated to the ability of the nanoparticles to block corroding coatings by decreasing the porosity of the dried epoxy paint.