Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 120, Issue 2-3, Pages 676-681Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2009.12.025
Keywords
Aluminum; Anodic film; Rare earth elements; Precursor method; Modification; Corrosion resistance
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Funding
- National Natural Science Foundation of China [50571006]
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Rare earth element Ce and Nd modified anodic films were prepared on aluminum surface by a relatively simple method: the aluminum samples were first immersed in Ni(NO3)(2) solutions containing Ce or Nd salts at 90 degrees C, then were dried and anodized. The contents of Ce or Nd in the anodic films were from 0.5% to 0.9%, and about 4-5% Ni was also introduced in the films. The modified anodic films were more compact with much smaller pores and increased hardness. In neutral, acidic and basic NaCl solutions, the rare earth modified films showed obviously improved corrosion resistance. The Ce modified films showed better corrosion resistance than Nd modified films. The cracking resistance of the films under heating was also improved. (C) 2009 Elsevier B.V. All rights reserved.
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