Suitability of carbon fiber-reinforced polymers as power cable cores: Galvanic corrosion and thermal stability evaluation
Suitability of carbon fiber-reinforced polymers as power cable cores: Galvanic corrosion and thermal stability evaluation
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DOI：
10.1016/j.matdes.2014.10.005
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发表时间：
2015
影响因子：
8.4
通讯作者：
T. Santos;G. Vasconcelos;W. A. Souza;M. L. Costa;E. C. Botelho
中科院分区：
文献类型：
--
作者：
T. Santos;G. Vasconcelos;W. A. Souza;M. L. Costa;E. C. Botelho
对电能的需求不断增加，安装新输电线路的困难也是一个全球性的挑战。输电线路电缆需要传导更多的电流，这就产生了电缆下垂过大的问题，并限制了塔之间的距离。因此，有必要开发具有低的热膨胀系数、低的密度和高的耐机械应力和腐蚀性的新电缆。连续纤维增强聚合物现在广泛用于许多行业，包括电力设施，并提供上级传统ACSR（铝导体钢增强）电缆的性能。虽然复合芯电缆在腐蚀方面表现出良好的性能，但碳纤维与铝的接触会促进电化学腐蚀，从而损害机械性能。在这项工作中，三种不同的纤维涂层进行了测试（酚醛树脂，环氧树脂，环氧树脂与聚酯编织），测量的伽伐尼电流。环氧树脂与聚酯编织物的组合使用提供了最好的抑制电偶腐蚀。热稳定性的研究表明，酚醛树脂的使用导致更高的玻璃化转变温度。另一方面，应用于环氧基树脂的后固化工艺使其能够实现高达200 °C的玻璃化转变温度。
The increasing demand for electrical energy and the difficulties involved in installing new transmission lines presents a global challenge. Transmission line cables need to conduct more current, which creates the problem of excessive cable sag and limits the distance between towers. Therefore, it is necessary to develop new cables that have low thermal expansion coefficients, low densities, and high resistance to mechanical stress and corrosion. Continuous fiber-reinforced polymers are now widely used in many industries, including electrical utilities, and provide properties that are superior to those of traditional ACSR (aluminum conductor steel reinforced) cables. Although composite core cables show good performance in terms of corrosion, the contact of carbon fibers with aluminum promotes galvanic corrosion, which compromises mechanical performance. In this work, three different fiber coatings were tested (phenol formaldehyde resin, epoxy-based resin, and epoxy resin with polyester braiding), with measurements of the galvanic current. The use of epoxy resin combined with polyester braiding provided the best inhibition of galvanic corrosion. Investigation of thermal stability revealed that use of phenol formaldehyde resin resulted in a higher glass transition temperature. On the other hand, a post-cure process applied to epoxy-based resin enabled it to achieve glass transition temperatures of up to 200 °C.