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首页> 外文期刊>International Journal of Electrochemical Science >The Influence of Low Temperature on the Corrosion of EH40 Steel in a NaCl Solution
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The Influence of Low Temperature on the Corrosion of EH40 Steel in a NaCl Solution

机译：低温对EH40钢在NaCl溶液中腐蚀的影响

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摘要

The high strength ocean engineering structural steel EH40 exhibited great potential for the building ofpolar expedition ships due to high performance strength, relevant low-temperature impact toughness,prominent ship plate steel extensions, and outstanding weldability. The corrosion behavior of modifiedEH40 steel in low-temperature (0 oC) 3.5Wt% NaCl solution over a 56-day period was investigatedusing mass loss techniques, surface characterization, component analysis, and electrochemicalmeasurements. The results showed that the corrosion rate of EH40 steel in low-temperature artificialseawater was relatively high compared to artificial seawater at room-temperature after 14 days ofimmersion. Notably, in the low-temperature NaCl solution, the scale deposits consisted mainly ofFe(ClxOy) under which, corrosion pits were initiated. Moreover, uneven corrosion products formed onthe steel surface and the size of the pit gradually increased with immersion time. In contrast, for theroom temperature NaCl solution, a compact and thick corrosion product film covered the steelsurfaces, protecting the steel from further corrosion and a characteristic uniform corrosion was presentin the steel.
机译：高强度海洋工程结构钢EH40具有极高的性能强度，相关的低温冲击韧性，突出的船板钢板延伸性和出色的可焊性，因此在极地考察船的制造中具有巨大的潜力。使用质量损失技术，表面表征，成分分析和电化学测量方法研究了改性EH40钢在低温（0 oC）3.5Wt％NaCl溶液中56天的腐蚀行为。结果表明，浸泡14天后，低温人工海水中EH40钢的腐蚀速率高于室温人工海水。值得注意的是，在低温NaCl溶液中，水垢沉积物主要由Fe（ClxOy）组成，在此之下开始了腐蚀坑。而且，随着浸入时间的增加，在钢表面形成的不均匀腐蚀产物和凹坑的尺寸逐渐增加。相反，对于室温的NaCl溶液，致密而厚的腐蚀产物膜覆盖在钢表面，可以保护钢免受进一步腐蚀，并且在钢中存在特征性的均匀腐蚀。

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