用5.0 mass%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"Cu_2Cl(OH)_3(碱式氯化铜),下层为Cu_2O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.
The corrosion behavior of foamed SiC/Cu co-continuous composite and the corresponding ma-trix material Cu was examined by 5.0% NaCl salt spray and then characterized by means of weight-loss, SEM and XRD. The results show that the outer corrosion products of the two materials are the same, aeruginosa Cu_2 Cl (OH)_3 and the inner layer is Cu_2O, a protective layer. The foamed composite is corroded faster than pure copper in NaCl aqueous solution. It could be mainly attributed to the special structure of the foamed SiC/Cu co-continuous composite. Copper in micropores of foam strut and at two-phase inter-face suffers severe corrosion in oxygenated aqueous solution containing Cl~-.
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