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Laser remelting was applied to plasma-sprayed Al-Si coating on magnesium alloy AZ91D to improve corrosion performance. Both salt spray testing and potentiodynamic polarization measurement in 3.5% NaCl solution indicated that laser-remelted Al-Si coating acquired better corrosion resistance than AZ91D and plasma-sprayed Al-Si coating. The decreasing order of the corrosion rates are AZ91D base metal, sprayed Al-Si coating and laser-remelted Al-Si coating. The fine Al-Si eutectic matrix in the laser-remelted microstructure contributed to the improved corrosion performance relative to the AZ91D and the plasma-sprayed coating. The predominant corrosion mechanisms in AZ91D. plasma-sprayed coating and laser-remelted coating are intra-granular corrosion, crevice corrosion and the combined pitting and galvanic corrosion, respectively. (C) 2010 Elsevier Ltd. All rights reserved.
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CORROSION SCIENCE
ISSN： 0010-938X
Year： 2010
Issue： 10
Volume： 52
Page： 3554-3560
8 . 3 0 0
JCR@2022
ESI Discipline： MATERIALS SCIENCE;
JCR Journal Grade：1
CAS Journal Grade：1
Cited Count：
WoS CC Cited Count： 61
SCOPUS Cited Count： 69
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 6
