Measurement of effective hydrogen diffusivity using the Scanning Kelvin Probe

被引：47
作者：
Schaller, R. F. [1 ]
Scully, J. R. [1 ]
机构：
[1] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2014年 / 40卷
关键词：
Scanning Kelvin Probe; Effective hydrogen diffusivity; FORCE MICROSCOPY; IRON; PERMEATION; DEUTERIUM; STEEL; TOOL; GAS;
D O I：
10.1016/j.elecom.2013.12.025
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Effective hydrogen diffusivity (D-H,D-eff) was determined utilizing the Scanning Kelvin Probe (SKP) to measure the SKP voltage on cross-sectioned, hydrogen pre-charged samples at 25 degrees C. Two secondary hardened martensitic steels, Fe-13Co-11Ni-3Cr-1.2Mo-0.2C-0.02Mn and Fe-11Ni-12Cr-lMo-0.005C-0.02Mn (wt%) were evaluated. D-H,D-eff was 1.5 to 2 x 10(-8) cm(2)/s. Results compared well to previously reported measurements for Fe-13Co-11Ni-3Cr-1.2Mo-0.2C-0.02Mn steel using isothermal Thermal Desorption (TDS) and an Arrhenius relationship to obtain an average D-H,D-eff of 8.96 x 10(-9) cm(2)/s at 25 degrees C (Thomas etal., 2002). (C) 2013 Elsevier By. All rights reserved.
引用
收藏
页码：42 / 44
页数：3
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