Investigation of Kelvin probe force microscopy efficiency for the detection of hydrogen ingress by cathodic charging in an aluminium alloy

被引:45
作者
Larignon, Celine [1 ]
Alexis, Joel [2 ]
Andrieu, Eric [1 ]
Lacroix, Loic [2 ]
Odemer, Gregory [1 ]
Blanc, Christine [1 ]
机构
[1] Univ Toulouse, CIRIMAT, CNRS, UPS,INPT,ENSIACET, F-31030 Toulouse 4, France
[2] Univ Toulouse, ENIT, LGP, F-65016 Tarbes, France
关键词
Kelvin probe force microscopy (KFM); Secondary ion mass spectroscopy (SIMS); Hydrogen diffusion; Aluminum alloys; CORROSION; PERMEATION;
D O I
10.1016/j.scriptamat.2012.11.026
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Detecting and locating absorbed hydrogen in aluminium alloys is necessary for evaluating the contribution of hydrogen embrittlement to the degradation of the mechanical properties for corroded or cathodically hydrogen-charged samples. The capability of Kelvin probe force microscopy (KFM) to overcome this issue was demonstrated. Aluminium alloy samples were hydrogenated by cathodic polarization in molten salts (KHSO4/NaHSO4 center dot H2O). The presence of absorbed hydrogen was revealed; the affected zone depth was measured by secondary ion mass spectroscopy analyses and KFM measurements. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:479 / 482
页数:4
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