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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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HCO3-和SO42-对Cu点蚀行为的影响
DOI: 10.3724/SP.J.1037.2011.00537, PP. 85-93
Keywords: 高放废物地质处置,Cu点蚀,循环极化,HCO3,SO42-
Abstract:
在不同浓度配比的HCO3-和SO42-混合溶液中,利用循环极化电化学测试方法和SEM,对Cu工作电极的循环极化行为和点蚀表面形貌进行了系统的研究.结果表明,在高电位范围的循环极化实验中,Cu的点蚀行为可分为活性溶解型点蚀和钝化膜破裂型点蚀;随SO42-浓度的升高Cu点蚀的敏感性增大.由于HCO3-与SO42-的协同作用,随HCO3-浓度升高点蚀敏感性呈先增大后减小的规律.在钝化膜破裂型点蚀中,SO42-提高Cu点蚀的诱发能力;HCO3-降低Cu点蚀的诱发能力.2种离子对点蚀自修复能力的影响无明显规律.
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