为了研究SiCP/2024Al复合材料阳极氧化的保护效果,用电化学方法、浸泡试验和盐雾试验研究了该复合材料及相应的施加阳极氧化保护试样在3.5%NaCl溶液中的腐蚀行为,并用扫描电子显微镜(SEM)对腐蚀形貌和氧化膜的微观形态进行了观察.结果表明:SiCP/2024Al经过阳极氧化后在3.5%NaCl溶液中的耐蚀性明显提高,Ecorr和Epit正移150 mV,Icorr从3.650 μA减小到0.358 μA,腐蚀速率由0.336 mm/a下降到0.122 mm/a;虽然SiC颗粒的存在影响了阻挡层的连续性,但多孔层仍能在电解质/材料界面不断生成,并且多孔层上的孔隙可以在封孔过程中得以闭合.
参考文献
[1] | Metzger M;Fisher S G .The influence of SiC reinforcement on pitting behavior of aluminum[J].Industrial & Engineering Chemistry Process Design and Development,1983,22:296-305. |
[2] | Aylor D M;Ferrara R J;Kain R M.Assessing the corrosion resistance of metal matrix composite materials in marine environments[J].Materials Performance,1984(07):32. |
[3] | Trazaskoma P P .Pit morphology of Al alloy and SiC/Al metal matrix composites[J].Corrosion,1990,46(05):402-409. |
[4] | Manfeld F;Lin S;Kim S et al.Corrosion protection of Al alloys and Al-based metal matrix composites by chemical passivation[J].CORROSION,1989,45(08):615-630. |
[5] | 贺春林,李凤琴,刘常升,史志明,赵明久,毕敬,才庆魁.SiCp/2024Al复合材料阳极氧化膜耐蚀性的电化学阻抗研究[J].金属学报,2001(08):869-872. |
[6] | Shahid M. .MECHANISM OF FILM GROWTH DURING ANODIZING OF AL-ALLOY-8090/SIC METAL MATRIX COMPOSITE IN SULPHURIC ACID ELECTROLYTE[J].Journal of Materials Science,1997(14):3775-3781. |
[7] | Manfeld F;Jeanjaquet S L .Influence of processing variables on the corrosion susceptibility of metal-matrix composites[J].Corrosion Science,1986,26(09):727. |
[8] | Trazaskoma P P;McCaffery E J .Corrosion behavior of SiC/Al metal matrix composites[J].Journal of the Electrochemical Society,1983,130(09):1804-1809. |
[9] | Kiourtsidis G;Skolianos S M .Stress corrosion behavior of aluminum alloy 2024Al/SiCP metal matrix composites[J].Materials Science and Engineering,1998,248:165-172. |
[10] | Hihara L H;Latanision R M .Corrosion of metal matrix composites[J].International Materials Reviews,1994,39:245-256. |
[11] | Lin S;Greene H;Shih H et al.Corrosion protection of Al/SiC metal matrix composites by anodizing[J].Science,1992,48:61-67. |
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