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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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铜合金在中国南海深海环境下的腐蚀行为研究
DOI: 10.3724/SP.J.1037.2013.00142, PP. 1211-1218
Keywords: 铜合金,腐蚀,深海,实海
Abstract:
通过实海暴露实验,研究了H62黄铜,QAl9-2铝青铜和QSn6.5-0.1锡青铜在中国南海海域800和1200m深海环境下浸泡3a的腐蚀行为.结果表明H62黄铜的腐蚀速率最高,达到0.042mm/a;QAl9-2铝青铜最低,仅为0.003mm/a;QSn6.5-0.1锡青铜居中,约为0.004-0.007mm/a.分析表明随着水深的增加,H62黄铜的腐蚀速率呈线性降低;QAl9-2铝青铜和QSn6.5-0.1锡青铜的腐蚀速率随水深的增加先降低后升高,腐蚀速率的最小值出现在水深800-1200m之间.采用SEM,EDS和XRD技术,进行了腐蚀形貌观察和腐蚀产物成分及相组成分析,结果表明H62黄铜发生了严重的脱锌腐蚀,腐蚀产物由Cu,ZnO,Zn5(OH)8Cl2H2O和Cu(OH)2H2O组成,符合溶解-再沉积机制;QAl9-2铝青铜和QSn6.5-0.1锡青铜发生了脱成分(Al,Sn)腐蚀,QAl9-2铝青铜的腐蚀产物由Cu2O和CuCl2组成,QSn6.5-0.1锡青铜的腐蚀产物由Cu2O,CuCl2和Cu2Cl(OH)3组成.
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