采用TEM,SEM和XPS等测试分析方法,研究了微量Cr的添加对铜合金在二氧化硫环境中耐蚀性的影响。结果表明:微量Cr的加入提高了合金的耐蚀性,随着添加量的增多,合金的耐蚀性进一步提高;另一方面,由于合金中低含量的Cr不能在试样表面独立成膜,耐蚀性的提高很大程度上依赖于致密腐蚀产物层对含Cr层的保护作用,所以微量Cr的加入对合金耐蚀性的改善是轻微的。同时,Cr的分布不均对合金的耐蚀性有一定的破坏作用。
Abstract
The corrosion behavior of cold-rolled copper alloy in humid air containing traces of SO2 was investigated using scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM),so as to understand the influence of microelement Cr on the corrosion resistance of material.The results showed the corrosion resistance of Cu-Cr alloy increases with Cr micro-addition;the increasing of corrosion resistance is strongly related with the compact scales which ensured Cr-contained layers integrated.In contrast,the corrosion resistance of copper alloy is weaken by the local distribution of element Cr.
关键词
Cr /
铜合金 /
SO2 /
腐蚀产物层
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Key words
Cr /
copper alloy /
SO2 /
corrosion scales
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中图分类号：
TG174.2
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参考文献
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脚注
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基金
国家高技术研究发展计划资助项目(2002AA331110)
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