The effects of flow rate on impedance measurements of marine coatings using a rotating cylinder electrode

IF 2.3 4区材料科学 Q2 CHEMISTRY, APPLIED Journal of Coatings Technology and Research Pub Date : 2024-07-09 DOI:10.1007/s11998-024-00957-w

Siti Musabikha, Gadang Priyotomo, Arini Nikitasari, Siska Prifiharni, Rahayu Kusumastuti, Dendy Satrio, I Ketut Aria Pria Utama, Mukhtasor Mukhtasor, Sony Junianto, Mokhtar Che Ismail

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Abstract

The vertical axis turbine used in the maritime energy sector must rotate and deal with turbulent flows in order to generate electricity. Structural failures and operational problems like corrosion can occur and lower turbine efficiency. Thus, additional surface protection through coatings is required for metal corrosion prevention. In these studies, the effects of turbulent flow on polyamine epoxy and fluoropolymer marine coatings were examined using electrochemical impedance spectroscopy (EIS). To simulate the flow effect, a rotating cylinder electrode (RCE) sample was placed in an aqueous solution containing 3.5 wt% sodium chloride, along with additional treatments of neutral salt spray to speed up the aging process. The fluoropolymer coating exhibits the best coating properties and provides robust corrosion protection with an impedance value of 8.7 Ω·cm². However, the results also show that turbulent flow, at a maximum speed of 5400 rpm, has an impact on coating corrosion resistance and reduces the protective properties of coatings of polyamine epoxy by up to 19% and fluoropolymer by up to 33%.

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流速对使用旋转圆筒电极测量海洋涂层阻抗的影响

海上能源领域使用的垂直轴涡轮机必须旋转并处理湍流才能发电。结构故障和腐蚀等运行问题会降低涡轮机的效率。因此，需要通过涂层提供额外的表面保护，以防止金属腐蚀。在这些研究中，使用电化学阻抗光谱（EIS）检测了湍流对多胺环氧树脂和含氟聚合物船用涂料的影响。为模拟流动效应，将旋转圆筒电极（RCE）样品置于含 3.5 wt% 氯化钠的水溶液中，并附加中性盐喷雾处理以加速老化过程。氟聚合物涂层表现出最佳的涂层性能，阻抗值为 8.7 Ω-cm2，提供了强有力的腐蚀保护。不过，研究结果也表明，最高转速为 5400 rpm 的湍流会影响涂层的耐腐蚀性，并使聚胺环氧涂层的保护性能降低达 19%，使含氟聚合物涂层的保护性能降低达 33%。

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来源期刊

Journal of Coatings Technology and Research 工程技术-材料科学：膜

CiteScore

4.30

自引率

8.70%

发文量

130

审稿时长

2.5 months

期刊介绍： Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.