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STUDY ON CORROSION PRODUCT FILM OF MAGNESIUM-ALUMINUM ALLOYS CONTAININGRARE-EARTH ELEMENT IN NaCl SOLUTION |
Liang Huang;Yuanwei` Huang;Chen Wang |
上海市中科院上海冶金所 |
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Abstract The corrosion resistance of magnesium-aluminum allo ys is closely related to the corrosion product film formed on the alloy's surfac e.The morphology and structure of the corrosion product film on pure Mg,Mg-Al and Mg-Al-RE alloys in the solution containing Cl\+- were examined by the var ious sur face analysis techniques including EMPA,EDS,SEM,TEM,XRD,AES etc.The results indi cated that the elemental aluminum is conducive to the corrosion resistance of al loys,but its beneficial effect is limited and unstable.The RE addition can obvi ously increase the Al concentration in corrosion product film.Also,the distribut i on of Al in corrosion product film of Mg-Al-RE alloys was broadened due to the a dd ition of RE.It indicated that the RE element promoted the formation of protectiv e film containing elemental Al.
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Received: 03 November 2000
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Corresponding Authors:
Liang Huang
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