Electrochemical Cathodic Protection Powered by Triboelectric Nanogenerator
Electrochemical Cathodic Protection Powered by Triboelectric Nanogenerator
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由摩擦纳米发电机供电的电化学阴极保护
DOI：
10.1002/adfm.201401168
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发表时间：
2014-11-12
影响因子：
19
通讯作者：
Wang, Zhong Lin
中科院分区：
文献类型：
--
作者：
Guo, Wenxi;Li, Xiaoyi;Wang, Zhong Lin
金属腐蚀是自然界中普遍存在的现象，金属的防腐在国民经济发展和人们的日常生活中起着举足轻重的作用。介绍了一种分段结构的圆盘式摩擦电纳米发电机(TENG)作为电源，以实现对钢的特殊阴极保护效果。当转速为每分钟1000转时，Teng的输出转移电荷和短路电流密度分别达到1.41 mC/min和10.1 mA/m2。通过对403不锈钢(403SS)的阴极保护电位、Tafel极化曲线和电化学阻抗谱(EIS)的测试，评价了403不锈钢的腐蚀防护效果。当钢在0.5m的氯化钠溶液中与圆盘的负极耦合时，通过改变旋转速度和外部电阻，可以获得-320 mV~-5320 mV的阴极保护电位。腐蚀试验结果表明，在0.5mNaC l溶液中，Teng能对Q235钢产生59.1%的保护度。此外，还介绍了将TEN安装在浮标上在海洋防腐中的应用。这项工作展示了一种多功能、高性价比和自供电的系统，可以从环境中清除机械能，从而在不增加电源的情况下有效地保护金属腐蚀。
Metal corrosion is universal in the nature and the corrosion prevention for metals plays an important role everywhere in national economic development and daily life. Here a disk triboelectric nanogenerator (TENG) with segmental structures is introduced as power source to achieve a special cathodic protection effect for steels. The output transferred charges and short‐circuit current density of the TENG achieve 1.41 mC/min and 10.1 mA/m2, respectively, when the rotating speed is 1000 revolutions per minute (rpm). The cathodic protection potential, Tafel polarization curves and electrochemical impedance spectra (EIS) measurements are measured to evaluate the corrosion protection effect for the 403 stainless steel (403SS). The cathodic protection potential range from –320 mV to –5320 mV is achieved by changing rotation speeds and external resistance when the steel is coupled in a 0.5 m NaCl solution to the negative pole of the disk TENG. The corrosion tests results indicate that the TENG can produce 59.1% degree of protection for Q235 steels in 0.5 m NaCl solution. Furthermore, an application of marine corrosion prevention is presented by mounting the TENG onto a buoy. This work demonstrates a versatile, cost‐effect and self‐powered system to scavenging mechanical energy from environment, leading to effectively protect the metal corrosion without additional power sources.