Measurement of effective hydrogen diffusivity using the Scanning Kelvin Probe

被引：50

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

页码：42 / 44

页数：3

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