Local enhancement of hydrogen production by the hydrolysis of Mg17Al12 with Mg "model" material

被引：11
|
作者：
Al Bacha, S. [1 ,2 ,3 ,4 ]
Farias, E. D. [5 ]
Garrigue, P. [5 ]
Zakhour, M. [1 ]
Nakhl, M. [1 ]
Bobet, J. -L. [2 ]
Zigah, D. [5 ,6 ]
机构：
[1] Lebanese Univ, Fac Sci 2, LCPM PR2N EDST, Jdeidet El Metn 90656, Lebanon
[2] Univ Bordeaux, ICMCB, CNRS, UMR 5026, F-33600 Pessac, France
[3] Univ Paris Saclay, Inst Chim Mol & Mat Orsay ICMMO ERIEE, UMR 8182, CNRS, F-91400 Orsay, France
[4] Univ Paris Saclay, Inst Lavoisier Versailles, UMR 8180, CNRS,UVSQ, F-78035 Versailles, France
[5] Univ Bordeaux, CNRS, UMR 5255, Bordeaux INP,ENSCBP, F-33607 Pessac, France
[6] Univ Poitiers, IC2MP, UMR CNRS 7285, F-86073 Poitiers 9, France
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 895卷
关键词：
SECM; Galvanic coupling; Corrosion; Mg; Hydrogen production; Mg17Al12; SCANNING ELECTROCHEMICAL MICROSCOPY; CORROSION BEHAVIOR; MAGNESIUM; GENERATION; AZ91; CHLORIDE; ALLOYS; MICROSTRUCTURE; PERFORMANCE; COMPOSITES;
D O I：
10.1016/j.jallcom.2021.162560
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of galvanic coupling on the corrosion behavior of Mg and Mg17Al12 in Mg-Al alloys was studied by Scanning ElectroChemical Microscopy (SECM). The effect of galvanic coupling between Mg and Mg17Al12 was investigated using a "model" Mg+Mg17Al12 material with a controlled microstructure to evaluate the hydrogen evolution at a micrometric scale. SECM maps revealed that galvanic coupling between Mg and Mg17Al12 accelerates the corrosion rate (formation of a thicker passive layer) of both components. Mg17Al12 acts controversially to a conventional cathode in galvanic system since hydrogen production by its hydrolysis reaction was found to increase due to the electron transfer with the anode (Mg). (c) 2021 Elsevier B.V. All rights reserved.
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页数：8
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