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铜在中国南沙群岛极端恶劣海洋大气中的腐蚀行为

Corrosion behavior of copper in extremely harsh marine atmosphere in Nansha Islands, China

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通过质量损失法、成分分析、形貌观察和电化学测试等手段,研究纯铜在南沙大气中暴露21个月后的腐蚀行为.结果表明,铜暴露一年的平均腐蚀速率约为7.85μm/a,这意味着南沙群岛属于CX腐蚀等级.在暴露样品的正反两面形成的腐蚀产物层的结构和性能差异很大.正面的腐蚀产物层内层(Cu2O)较厚且致密,外腐蚀产物层(Cu2Cl(OH)3)极薄;而样品反面的外产物层却比内层厚.电化学测试结果表明,正面腐蚀产物层提供的防护作用逐渐增强,而反面腐蚀产物层的防护作用逐渐减弱.
The corrosion behavior of pure copper exposed to the atmosphere of Nansha Islands for 21 months was studied by mass loss method, composition analysis, morphology observation and electrochemical measurements. The results showed that the average corrosion rate of copper exposed for one year was approximately 7.85 μm/a, implying that Nansha Islands was classified as a corrosion category of CX. The structure and properties of the corrosion product layer generated on the front and back sides of the exposed sample differed significantly. The inner corrosion product layer (Cu2O) on the front side was relatively thick and dense, whereas the outer product layer (Cu2Cl(OH)3) was extremely thin. However, the outer product layer on the back side was thicker than the inner layer. Electrochemical measurements indicated that the protection afforded by the corrosion product layer on the front side was improved gradually, while that on the back side was deteriorated.

copperfield exposuremass lossatmospheric corrosionNansha Islands

路肖、刘雨薇、赵洪涛、潘晨、王振尧

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中国科学技术大学 材料科学与工程学院,沈阳 110016

中国科学院金属研究所,沈阳 110016

铜 现场暴露 质量损失 大气腐蚀 南沙群岛

authors are grateful for the financial supports from National Natural Science Foundation of ChinaStrategic Priority Research Program of Chinese Academy of Sciences (13040502)

51671197

2021

10.1016/S1003-6326(21)65531-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(3)
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