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

金属学报

2013, Vol. 49

Issue (10): 1211-1218 DOI: 10.3724/SP.J.1037.2013.00142

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铜合金在中国南海深海环境下的腐蚀行为研究

孙飞龙,李晓刚,卢琳,万红霞,杜翠薇,刘智勇

北京科技大学腐蚀与防护中心, 北京100083

CORROSION BEHAVIOR OF COPPER ALLOYS IN DEEP OCEAN ENVIRONMENT OF SOUTH CHINA SEA

SUN Feilong, LI Xiaogang, LU Lin, WAN Hongxia, DU Cuiwei, LIU Zhiyong

Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083

引用本文:

孙飞龙,李晓刚,卢琳,万红霞,杜翠薇,刘智勇. 铜合金在中国南海深海环境下的腐蚀行为研究[J]. 金属学报, 2013, 49(10): 1211-1218.
SUN Feilong, LI Xiaogang, LU Lin, WAN Hongxia, DU Cuiwei, LIU Zhiyong. CORROSION BEHAVIOR OF COPPER ALLOYS IN DEEP OCEAN ENVIRONMENT OF SOUTH CHINA SEA[J]. Acta Metall Sin, 2013, 49(10): 1211-1218.

全文: PDF(4256 KB)

摘要:

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1200 m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0.042 mm/a;QAl9-2铝青铜最低, 仅为0.003 mm/a; QSn6.5-0.1锡青铜居中, 约为0.004-0.007 mm/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800-1200 m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.

关键词 ：铜合金, 腐蚀, 深海, 实海

Abstract：

The corrosion in deep ocean environment has been paied more and more attentions to the exploitation of marine resources. Different from shallow marine environments, deep ocean environments are specially characterized by high hydrostatic pressure, low temperature, variable dissolved oxygen content and pH value in deep ocean, etc.. So the corrosion behaviour of materials, such as ferrous and nonferrous metal and coatings, in deep ocean environments is different from that in shallow marine environments. A number of researches have been carried out to investigate the corrosion behaviour of metals in natural deep ocean in a few developed countries. Such researches, however, began until 2008 in South China Sea. In this work, the corrosion behavior of H62 brass, QAl9-2 and QSn6.5-0.1 bronze in 800 and 1200 m deep ocean environments of South China Sea was studied using field tests. The results indicated that the corrosion rates of copper alloys decreased in the following order: H62 (0.042 mm/a) > QSn6.5-0.1 (0.004-0.007 mm/a) > QAl9-2 (0.003 mm/a). The corrosion rate of H62 brass decreased linearly with the increase in depth. While the corrosion rates of QAl9-2 and QSn6.5-0.1 bronze decreased first and then increased with the increase in depth. The minimum value of corrosion rate occurred between 800-1200 m. The morphology and composition of corrosion products were investigated using SEM, EDS and XRD. The results demonstrated that the dezincification corrosion obeying solution-redeposition mechanism in H62 brass occurred. The corrosion products were composed of Cu, ZnO, Zn₅(OH)₈Cl₂H₂O and Cu(OH)₂H₂O. And the dealloying corrosion in QAl9-2 and QSn6.5-0.1 bronze occurred. The corrosion products of QAl9-2 bronze consist of Cu₂O and CuCl₂, and those of QSn6.5-0.1 bronze Cu₂O, CuCl₂ and Cu₂Cl(OH)₃.

Key words： copper alloy corrosion deep ocean field test

收稿日期: 2013-03-28

基金资助:

国家自然科学基金资助项目51171025

作者简介: 孙飞龙, 女, 1985生, 博士生

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https://www.ams.org.cn/CN/10.3724/SP.J.1037.2013.00142 或 https://www.ams.org.cn/CN/Y2013/V49/I10/1211

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