Quantification of Localized Water Image in Under-Film Corroded Steel with High Spatial Resolution, High Time Resolution, and Wide View by Neutron Radiography
Quantification of Localized Water Image in Under-Film Corroded Steel with High Spatial Resolution, High Time Resolution, and Wide View by Neutron Radiography
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DOI：
10.2320/matertrans.m2018017
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发表时间：
2018-05
影响因子：
1.2
通讯作者：
A. Taketani;Y. Wakabayashi;Y. Otake;Y. Ikeda;T. Wakabayashi;K. Kono;T. Kai;K. Oikawa;H. Sunaga;M. Yamada;T. Nakayama
中科院分区：
文献类型：
--
作者：
A. Taketani;Y. Wakabayashi;Y. Otake;Y. Ikeda;T. Wakabayashi;K. Kono;T. Kai;K. Oikawa;H. Sunaga;M. Yamada;T. Nakayama
关于腐蚀部位存在局部水的信息对于精确理解钢的腐蚀机制是必不可少的。膜下腐蚀中的少量局部水尚未定量测量。虽然我们已经证明，中子射线照相对氢的存在具有高灵敏度，是利用RIKEN加速器驱动中子源（RANS）检测涂漆钢膜下腐蚀中的水的合适方法，但空间和时间分辨率不足以详细研究膜下腐蚀。在此基础上，利用J-PARC的高强度中子源，以更高的空间和时间分辨率对钢腐蚀中的局部水进行了成像实验。我们获得的数据空间分辨率为0.6mm，时间分辨率为15 s，观测面积为100©100mm2。在腐蚀中局部水定量成像结果的基础上，建立了一种适用于钢腐蚀中水直接成像的中子成像方法。(doi: 10.2320 / matertrans.M2018017)
Information on the existence of localized water at corrosion locations is indispensable for precisely understanding the corrosion mechanism in steel. Small amounts of localized water in under-film corrosion have not yet been measured quantitatively. Although we have demonstrated that neutron radiography, which has high sensitivity to the presence of hydrogen, is suitable method for detecting of water in the under-film corrosion of painted steel by utilizing the RIKEN Accelerator-driven Neutron Source (RANS), the spatial and time resolutions were insufficient to investigate under-film corrosion in detail. We then performed an imaging experiment on localized water in steel corrosion with higher space and time resolutions using the high-intensity neutron source at J-PARC. We obtained data with a spatial resolution of 0.6mm, a time resolution of 15 s in a viewing area of 100 © 100mm2. On the basis of the results for the quantitative imaging of localized water in corrosion, we have established a method suitable for directly imaging water in steel corrosion that employs neutrons. [doi:10.2320/matertrans.M2018017]