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泡沫SiC/Cu双连续相复合材料的盐雾腐蚀行为

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Keywords: 盐雾腐蚀,双连续相复合材料,腐蚀失重

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Abstract:

用5.0mass%的NaCl水溶液对泡沫SiC/Cu双连续相复合材料和对应的基体材料纯铜进行盐雾腐蚀实验.采用腐蚀失重法、扫描电子显微镜和X射线衍射仪对比研究这两种材料的腐蚀行为.结果表明两种材料的腐蚀产物成分相同,为“铜绿”Cu2Cl(OH)3(碱式氯化铜),下层为Cu2O保护层;在NaCl水溶液中,该复合材料比纯铜材料的腐蚀敏感性大,主要是因为在含氧的Cl-水溶液中该复合材料的结构特性致使泡沫筋微孔中和两相界面处的Cu严重腐蚀.

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