4.7 Article

Experimental study of corrosion protection of a three-layer film on AZ31B Mg alloy

Journal

CORROSION SCIENCE
Volume 65, Issue -, Pages 367-375

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2012.08.055

Keywords

Magnesium; Organic coatings; Nickel; Metal coatings; Anodic films

Funding

  1. National Science and Technology Ministry [2011BAE22B05]
  2. Material foundation and application technology of key projects [A0920110028]

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A composite three-layer film was prepared on AZ31B Mg alloy for corrosion protection by means of plasma electrolytic oxidation (PEO), self-assembled nanophase particle (SANP) and electroless nickel (EN) plating. Structure and corrosion protection were characterized by various analytical instruments and electrochemical methods. Experiment results indicated that the composite film consisted of compact EN plating and coherent bilayer film, which provided effective protection for Mg alloy against galvanic corrosion and long-term immersion corrosion. (C) 2012 Elsevier Ltd. All rights reserved.

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