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Effect of dissolved oxygen and coupled resistance on the galvanic corrosion of Cr-Ni low-alloy steel/90-10 cupronickel under simulated deep sea condition

机译:溶解氧和耦合电阻对CR-Ni低合金钢/ 90-10铜绿电腐蚀的影响模拟深海条件下

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摘要

The influence of dissolved oxygen content (DOC) and coupled resistance on the galvanic corrosion rate of Cr-Ni low-alloy steel (FeCrNi) coupled with 90Cu-10Ni cupronickel alloy in simulated 500m deep sea environment was investigated by means of weight loss measurements and scanning electron microscopy. The results indicated that the galvanic corrosion rate increased with the increase of DOC and decreased with the resistance increased. FeCrNi showed pitting corrosion in low DOC condition and uniform corrosion in high DOC sea water. Moreover, the galvanic corrosion rate at 50at was bigger than that of 1at. Galvanic corrosion rate was reduced 99% by increasing the resistance from 0 to 2000 between FeCrNi and CuNi. The results of this research can be used to guide ocean engineering facilities design and galvanic corrosion control.
机译:通过减肥测量研究了溶解氧含量(FECRNI)与模拟500M深海环境中的90cu-10ni Cupronickel合金的Cr-Ni低合金钢(FECRNI)的电致腐蚀速率的影响。 扫描电子显微镜。 结果表明,随着DOC的增加,电阻增加而增加了电流腐蚀速率。 FECRNI在低DOC海水中表现出低DOC条件和均匀腐蚀的腐蚀。 此外,50at的电流腐蚀速率比1at的电流腐蚀速率大。 通过将0至2000之间的抗性从Fecrni和Cuni之间增加,电流腐蚀速率降低了99%。 该研究的结果可用于引导海洋工程设施设计和电流腐蚀控制。

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