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首页> 外文期刊>Journal of Materials Engineering and Performance >Electrochemical Behavior of Three 90Cu-10Ni Tubes from Different Manufacturers After Immersion in 3.5% NaCl Solution
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Electrochemical Behavior of Three 90Cu-10Ni Tubes from Different Manufacturers After Immersion in 3.5% NaCl Solution

机译：3.5％NaCl溶液浸泡后不同厂商390厘米10NI管的电化学行为

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摘要

Investigation on the electrochemical behavior and corrosion product films formed on three 90Cu-10Ni tubes designated as Tubes A, B and C from three different manufacturers with different service lives were carried out using electrochemical techniques, SEM, XRD and XPS after immersion in 3.5 wt.% NaCl solution. The results of polarization curve measurements showed noticeable decrease in the corrosion current densities (I (corr)) of the three tubes with immersion time, and the I (corr) of Tube C was comparatively lower than those of Tubes A and B at early immersion period. EIS measurements revealed duplex film layers on the surface of the samples with the inner film formation occurring at different times for different tubes as the film resistance R (f2) revealed the formation of the inner compact layer in Tube C after 15-day immersion and in Tubes A and B after 30 days. Tube C showed better corrosion resistance which is due to early formation of the inner compact oxide film. The XPS analysis revealed Ni enrichment on the surface film of the three samples but Ni depletion as the immersion time is increased.
机译：用电化学技术，SEM，XRD和XPS在3.5重量下浸入390℃，B和C的三个90cu-10ni管中形成的电化学行为和腐蚀产品薄膜的研究。 ％NaCl溶液。偏振曲线测量结果显示出具有浸入时间的三个管的腐蚀电流密度（I（COR））的显着降低，并且管C的I（COR）比早期浸没的管A和B相对低时期。 EIS测量显示在样品表面上的双链膜层，其内膜形成在不同时间在不同管中发生，因为膜电阻R（F2）显示在15天浸没后的管C中形成内紧凑层的形成30天后的管A和B.管C显示出更好的耐腐蚀性，这是由于内致氧化膜的早期形成。 XPS分析显示出三个样品的表面膜上的Ni富集，但随着浸入时间的增加，Ni耗尽增加。

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