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The effect of hot extrusion on the microstructure and anti-corrosion performance of LDHs conversion coating on AZ91D magnesium alloy
Zhang, Xiaochen; Zhong, Feng; Li, Xuanpeng; Liu, Bin; Zhang, Chunyan; Buhe, Bateer; Zhang, Tao; Meng, Guozhe; Wang, Fuhui
2019-06-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume788Pages:756-767
AbstractIn this study, the effect of hot extrusion on the microstructure and anti-corrosion performance of LDHs (layered double hydroxides) conversion coating on AZ91D magnesium alloy was investigated by means of microscopic observation and electrochemical measurement. After hot extrusion, the refinement and rearrangement of the beta-Mg17Al12 phase promotes the microgalvanic effect in the formation process, and the increase of dislocation density, twin, grain boundary and texture accelerates the dissolution rate of the Mg matrix. Due to microstructural differences, the electrochemical activity of various specimens in the formation process can be ranked as the increasing series: as-cast < transverse < longitude. Therefore, a thicker and more compact LDH conversion coating is formed on the longitudinal section of the extruded alloy, indicating the highest anti-corrosion performance. (C) 2019 Elsevier B.V. All rights reserved.
KeywordAZ91D magnesium alloy Hot extrusion LDHs conversion coating beta-Mg17Al12 Microgalvanic Corrosion performance
Indexed BySCI
Language英语
WOS IDWOS:000462767000089
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81016
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang, Xiaochen,Zhong, Feng,Li, Xuanpeng,et al. The effect of hot extrusion on the microstructure and anti-corrosion performance of LDHs conversion coating on AZ91D magnesium alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,788:756-767.
APA Zhang, Xiaochen.,Zhong, Feng.,Li, Xuanpeng.,Liu, Bin.,Zhang, Chunyan.,...&Wang, Fuhui.(2019).The effect of hot extrusion on the microstructure and anti-corrosion performance of LDHs conversion coating on AZ91D magnesium alloy.JOURNAL OF ALLOYS AND COMPOUNDS,788,756-767.
MLA Zhang, Xiaochen,et al."The effect of hot extrusion on the microstructure and anti-corrosion performance of LDHs conversion coating on AZ91D magnesium alloy".JOURNAL OF ALLOYS AND COMPOUNDS 788(2019):756-767.
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