Paper Title:
Corrosion Properties of Plasma Electrolytic Oxidation Ceramic Coatings on an A356 Alloy Tested in an Ethanol-Gasoline Fuel (E85) Medium
  Abstract

Ceramic oxide coatings were prepared on an aluminum A356 alloy by a plasma electrolytic oxidation (PEO) technique under unipolar, bipolar and duplex unipolar/bipolar current modes. Cross-sectional morphologies of the coatings were studied using a scanning electron microscope (SEM). The corrosion behavior of the coated and uncoated samples was evaluated in ethanol-gasoline E85 fuels through potentiodynamic polarization and zero resistance ammeter (ZRA) testing methods. The results indicated that all the coatings had a better corrosion resistance compared to the uncoated substrate. The unipolar current mode created the PEO coating with a thicker coating microstructure and thus a better corrosion resistance, compared to a bipolar current mode. The duplex treatments of unipolar/bipolar or bipolar/unipolar current modes produced the best performance of the coatings against galvanic corrosions caused by a steel/Al coupling in the E85 fuel medium.

  Info
Periodical
Advanced Materials Research (Volumes 282-283)
Chapter
Chapter 4: Intelligent Materials, Photonics and Power
Edited by
Helen Zhang and David Jin
Pages
774-778
DOI
10.4028/www.scientific.net/AMR.282-283.774
Citation
Z. J. Peng, Y. Chen, X. Y. Nie, "Corrosion Properties of Plasma Electrolytic Oxidation Ceramic Coatings on an A356 Alloy Tested in an Ethanol-Gasoline Fuel (E85) Medium", Advanced Materials Research, Vols. 282-283, pp. 774-778, 2011
Online since
July 2011
Export
Price
$32.00
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