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首页> 外文期刊>RSC Advances >A study on the local corrosion behavior and mechanism of electroless Ni–P coatings under flow by using a wire beam electrode
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A study on the local corrosion behavior and mechanism of electroless Ni–P coatings under flow by using a wire beam electrode

机译：线束电极研究化学镀Ni-P涂层在流动下的局部腐蚀行为及其机理

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摘要

The local corrosion behavior and mechanism of Ni–P coatings in a 3.5 wt% sodium chloride solution with different flow speeds (0 m s ~(?1) , 0.5 m s ~(?1) , 1 m s ~(?1) ) were investigated through a wire beam electrode (WBE) with morphological, elemental and electrochemical analyses as well as numerical simulations. It was found that the microstructure of the Ni–P coating was in the shape of broccoli and possessed satisfactory compactness and uniformity. The numerical simulations showed that the speed increased and the static pressure decreased at the local area. Combined with WBE, it was found that the average corrosion potential decreased at that area. The results indicated that the corrosion tendency and corrosion rate of the Ni–P coating were larger at higher speeds, and the corrosion resistance could be improved by the electroless Ni–P coating. WBE was helpful in revealing the local electrochemical information of the Ni–P coating.
机译：研究了不同流速（0 ms〜（？1），0.5 ms〜（？1），1 ms〜（？1））的Ni-P涂层在3.5 wt％氯化钠溶液中的局部腐蚀行为及其机理。通过线束电极（WBE）进行形态，元素和电化学分析以及数值模拟。发现Ni-P涂层的微观结构为西兰花形状，并具有令人满意的致密性和均匀性。数值模拟表明，局部区域速度增加，静压力减小。结合WBE，发现该区域的平均腐蚀电位降低。结果表明，Ni-P涂层的腐蚀趋势和腐蚀速率在较高的速度下会更大，并且化学镀Ni-P涂层可以改善其耐腐蚀性。 WBE有助于揭示Ni-P涂层的局部电化学信息。

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