Determination of Hydrogen Diffusivity in Rail Steels by Sub-Scale Microhardness Profiling Technique
作者： Abhijeet Moon , R. Balasubramaniam
DOI: 10.4028/WWW.SCIENTIFIC.NET/DDF.293.41
关键词: Eutectic system 、 Metallurgy 、 Thermal diffusivity 、 Hydrogen 、 Materials science 、 Cathodic protection 、 Indentation hardness 、 Current density
摘要: Hydrogen diffusivity was estimated in three different eutectoid rail steels (C-Mn, Cu-Mo and Ni-Cu-Cr) at ambient temperatures using the technique of sub-surface microhardness profiling after cathodic hydrogen charging 0.5mol/l sulphuric acid a current density 0.1A/cm2 for 24 hours. The increase concentration certain depth below surface related to this location as compared bulk value. procedure used obtain diffusion coefficient from profiles is discussed. values all were found be similar (of order 10-13m2/sec). steel lower than pure iron (10-8m2/sec). Possible reasons difference are
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