Investigation of hydrogen transport behavior of various low-alloy steels with high-pressure hydrogen gas
Investigation of hydrogen transport behavior of various low-alloy steels with high-pressure hydrogen gas
复制标题
高压氢气下各种低合金钢氢输运行为的研究
DOI：
10.1016/j.ijhydene.2015.07.006
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发表时间：
2015
影响因子：
7.2
通讯作者：
S. Matsuoka
中科院分区：
文献类型：
--
作者：
J. Yamabe;Tohru Awane;S. Matsuoka
用高压氢气测定Cr-Mo钢和Ni-Cr-Mo钢的表观氢扩散系数和饱和氢含量。还通过使用镀钯样品和使用有限元方法进行扩散分析来研究表面对氢进入和退出的影响。采用气相色谱-质谱联用技术测定不同尺寸的受氢圆柱形试样的氢含量，得到饱和氢含量。通过将扩散方程的解拟合到通过在不同恒定温度下解吸确定的实验氢含量来确定扩散率。在所检查的样本中，室温下的表面效应非常显着。扩散率的温度依赖性与主要通过电化学充电测量的参考数据相当一致。这些结果是根据氢捕获来解释的。普通电化学充电的条件比暴露于高压氢气（例如 100 MPa）更严酷。
The apparent hydrogen diffusivity and the saturated hydrogen content of Cr–Mo and Ni–Cr–Mo steels were determined with high-pressure hydrogen gas. Surface effects on hydrogen entry and exit were also investigated by using palladium-coated samples and by diffusion analysis using the finite-element method. Hydrogen contents of hydrogen-exposed cylindrical specimens of various sizes were measured by means of gas chromatography–mass spectrometry to obtain the saturated hydrogen content. The diffusivity was determined by fitting the solution of a diffusion equation to the experimental hydrogen contents determined by desorption at various constant temperatures. In the specimens examined, surface effects were significant at room temperature. The temperature dependences of the diffusivity were reasonably consistent with reference data mainly measured with electrochemical charging. These results were interpreted in terms of hydrogen trapping. Ordinary electrochemical charging represents a more severe condition than exposure to high-pressure hydrogen, for example, at 100 MPa.