采用激光共聚焦显微镜研究了7A04-T6铝合金在3.5％ NaCl溶液中腐蚀形貌随时间的演变;对浸泡试样进行了失重计算和拉伸性能测试,并观察了拉伸断口形貌.结果表明,在初始两周,金属化合物周围的沟逐渐加深并向四周扩展,这是失重的主要原因,此时腐蚀对拉伸性能影响较小;随后,腐蚀产物在金属表面的沉积,腐蚀面积的增加以及暴露出来的金属化合物粒子数量的增多导致腐蚀失重速度加快;金属间化合物周围的沟连在一起并向基体深入,造成拉伸试样颈缩现象弱化,延伸率下降.
参考文献
| [1] | Kyung-Hwan Na;Su-Il Pyun .Comparison of susceptibility to pitting corrosion of AA2024-T4, AA7075-T651 and AA7475-T761 aluminium alloys in neutral chloride solutions using electrochemical noise analysis[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(1):248-258. |
| [2] | Mokaddem, M.;Tardelli, J.;Ogle, K.;Rocca, E.;Volovitch, P. .Atomic emission spectroelectrochemical investigation of the anodization of AA7050T74 aluminum alloy[J].Electrochemistry communications,2011(1):42-45. |
| [3] | Lacroix L;Ressier L;Blanc C;Mankowski G .Statistical study of the corrosion behavior of Al2CuMg intermetallics in AA2024-T351 by SKPFM[J].Journal of the Electrochemical Society,2008(1):C8-C15. |
| [4] | X. Zhou;C. Luo;T. Hashimoto;A.E. Hughes;G.E. Thompson .Study of localized corrosion in AA2024 aluminium alloy using electron tomography[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2012(may):299-306. |
| [5] | S.Jain;M.LC. Lim;J.L. Hudson;J.R. Scully .Spreading of intergranular corrosion on the surface of sensitized Al-4.4Mg alloys:A general finding[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2012(Jun.):136-147. |
| [6] | Christine Blanc;Alexandre Freulon;Marie-Christine Lafont;Yolande Kihn;Georges Mankowski .Modelling the corrosion behaviour of Al_2CuMg coarse particles in copper-rich aluminium alloys[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2006(11):3838-3851. |
| [7] | Joachim Wloka;Gotthold Burklin;Sannakaisa Virtanen .Influence of second phase particles on initial electrochemical properties of AA7010-T76[J].Electrochimica Acta,2007(4):2055-2059. |
| [8] | Stable pit formation on AA2024-T3 in a NaCl environment[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2010(1):90. |
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