Journal
CORROSION SCIENCE
Volume 82, Issue -, Pages 58-66Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2013.12.019
Keywords
Magnesium; SEM; Corrosion fatigue; Oxide coatings
Funding
- Engineering and Physical Sciences Research Council (U.K.) [LATEST2]
- European Regional Development Fund
- Engineering and Physical Sciences Research Council [EP/H020047/1] Funding Source: researchfish
- EPSRC [EP/H020047/1] Funding Source: UKRI
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The effect of plasma electrolytic oxidation (PEO) on the fatigue of AZ61 magnesium alloy has been investigated under high cycle conditions in air and 3.5% NaCl solution. PEO employed an alkaline pyrophosphate-silicate-fluoride electrolyte, with an offset square waveform, a frequency of 50 Hz, and current density of 130 mA cm(-2). The PEO treatment led to reductions in the fatigue limit by 38% in air and by 56% in 3.5% NaCl solution. The reduction of the fatigue limit is attributed to cracking of the coating, roughness of the alloy/coating interface, corrosion and influences of Al-Mn particles. (C) 2014 The Authors. Published by Elsevier Ltd. All rights reserved.
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