Microelectrochemical Investigation of Hydrogen Absorption and Dissolution Behavior of MnS Inclusions in Carbon Steel
Microelectrochemical Investigation of Hydrogen Absorption and Dissolution Behavior of MnS Inclusions in Carbon Steel
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DOI：
10.1149/1.3577749
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
I. Muto;Junichi Shinozaki;T. Omura;M. Numata;N. Hara
中科院分区：
文献类型：
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作者：
I. Muto;Junichi Shinozaki;T. Omura;M. Numata;N. Hara
对有、无MnS夹杂的小区域进行了微电化学极化和银装饰技术。MnS夹杂物被发现部分溶解在电位范围从0.15至-0.45 V（相对于Ag/AgCl，3.33 M KCl）的硼-硼酸盐缓冲液（pH 8.45）与10 mM NaCl，而整个表面的夹杂物溶解低于和高于这个电位范围。银沉积仅发生在低于-0.2 V的MnS夹杂物上和周围，这通常对应于硫化氢离子的稳定区域。当MnS夹杂物部分溶解时，银仅在溶解区域沉积。MnS夹杂物中的溶解物种促进了吸氢反应。
Microelectrochemical polarization and silver decoration techniques were performed on the small area with and without MnS inclusions. MnS inclusions were found to be partially dissolved in the potential range from 0.15 to-0.45 V (vs. Ag/AgCl, 3.33 M KCl) in a boric-borate buffer (pH 8.45) with 10 mM NaCl, whereas the entire surface of the inclusions was dissolved below and above this potential range. Silver deposition occurred only on and around MnS inclusions below-0.2 V, which generally corresponded to the stable region of hydrogen sulfide ions. When MnS inclusions partially dissolved, silver deposition occurred only in the dissolved area. The dissolution species from MnS inclusions seems to promote hydrogen absorption reaction.