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Effect of Cast Defects on the Corrosion Behavior and Mechanism of UNS C95810 Alloy in Artificial Seawater

机译:铸造缺陷对UNS C95810合金在人工海水中的腐蚀行为及其机理的影响

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摘要

To study the effect of cast defects on the corrosion behavior and mechanism of the UNS alloy in seawater, an investigation was conducted by weight loss determination, scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), X-ray diffraction (XRD) and electrochemical testing of the specimen with and without cast defects on the surface. The results show that the corrosion rate of the alloy with cast defects is higher than that of the alloy without cast defects, but the defects do not change the composition of the resulting corrosion products. The defects increase the complexity of the alloy microstructure and the tendency toward galvanic corrosion, which reduce the corrosion potential from −3.83 to −86.31 mV and increase the corrosion current density from 0.228 to 0.23 μA⋅cm .
机译:为了研究铸造缺陷对UNS合金在海水中的腐蚀行为和机理的影响,通过失重测定,扫描电子显微镜(SEM),共聚焦激光扫描显微镜(CLSM),X射线衍射(XRD)进行了研究。 )以及对表面有无铸件缺陷的样品进行电化学测试。结果表明,具有铸造缺陷的合金的腐蚀速率高于没有铸造缺陷的合金的腐蚀速率,但是缺陷不会改变所得腐蚀产物的组成。缺陷增加了合金微观结构的复杂性和电化腐蚀的趋势,将腐蚀电位从-3.83降低到-86.31 mV,并将腐蚀电流密度从0.228μA·cm增加到0.23μA·cm。

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