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首页> 外文期刊>Environmental Science & Technology >Stainless steels can be cathodically protected using energy stored at the marine sediment/seawater interface
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Stainless steels can be cathodically protected using energy stored at the marine sediment/seawater interface

机译：可以使用海洋沉积物/海水界面中存储的能量对不锈钢进行阴极保护

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Laboratory-scale experiments were performed in which the corrosion protection of stainless steels in seawater was afforded by cathodic protection. The method was implemented for the first time using the potential difference at the marine sediment/ seawater interface as the only source of electric power. Graphite electrodes buried in marine sediment, developing a potential of -0.45 V versus a saturated calomel electrode (SCE), were used as anodes to cathodically polarize UNS S30403 stainless steel coupons that were exposed to seawater. The cathodic protection system was operated with low polarization of stainless steel, typically to -0.2 V (vs SCE) and was found to properly prevent material failure even in the presence of a well-developed biofilm. With voltammetry, the protection current was found to be related to the oxidation of reduced sulfur compounds in the sediments. Results demonstrate that this inexpensive and environmentally friendly method can, so far, extend the service life of stainless steels in seawater.
机译：进行了实验室规模的实验，其中通过阴极保护对不锈钢进行海水腐蚀保护。该方法是首次使用海洋沉积物/海水界面处的电位差作为唯一电源来实施的。埋在海洋沉积物中的石墨电极相对于饱和甘汞电极（SCE）的电位为-0.45 V，被用作阳极来极化暴露在海水中的UNS S30403不锈钢试样。阴极保护系统在低极化的不锈钢下运行，通常达到-0.2 V（vs SCE），即使在存在完善的生物膜的情况下，也能正确防止材料失效。使用伏安法，发现保护电流与沉积物中还原的硫化合物的氧化有关。结果表明，到目前为止，这种廉价且环保的方法可以延长不锈钢在海水中的使用寿命。

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