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>Hydrogen Absorption into Fe Plates with Rust Layers Containing Various MgCl2 Amounts during Atmospheric Corrosion with Controlled Humidity
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Hydrogen Absorption into Fe Plates with Rust Layers Containing Various MgCl2 Amounts during Atmospheric Corrosion with Controlled Humidity
Fe plates with rust layers containing various MgCl_(2) amount were prepared as specimens. Each specimen was subjected to dry/wet repeat test beyond 50 cycles, and then subjected to electrochemical hydrogen absorption test under atmospheric corrosion in the air with controlled relative humidity (RH). For an MgCl_(2) amount of 39.8 g·m~(?2), a hydrogen absorption rate (i _(H)) started to increase from an RH around 15%, steeply increased with an increase in RH up to about 30%, steeply decreased up to about 35%, gradually increased up to 65% and gradually decreased up to about 92%. A decrease in MgCl_(2) amount in the range between 0.514 and 39.8 g·m~(?2) induced a decrease in i _(H) in wide RH range. The maximum i _(H) at an RH around 30% increased with an increase in MgCl_(2) amount in the rust layer. Besides, the RH where the maximum i _(H) was obtained beyond an RH of 40% increased with a decrease in MgCl_(2) amount. From theoretical relationship between RH and thickness of MgCl_(2) solution film on the Fe plate without rust layer, it is found that the solution film thicknesses at the RHs were about 0.18 mm, almost independent of MgCl_(2) amount. In addition, thicknesses of the rust layers containing 25.7 and 39.8 g·m~(?2) MgCl_(2) were measured to be almost 0.18 mm each other. The trends of i _(H) depending on MgCl_(2) amount were tried to be explained using nature of deliquescence for MgCl_(2).
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机译：用含有各种MgCl_（2）量的铁锈层的Fe板作为样品制备。将每个样品进行干/湿重复试验超过50个循环，然后在具有受控的相对湿度（RH）的空气中在大气腐蚀下进行电化学氢吸收试验。对于MgCl_（2）的量为39.8g·m〜（α2），氢吸收率（ i _（h））开始从RH增加约15％，随着RH增加而急剧增加至多30％，急剧下降至多约35％，逐渐增加高达65％，逐渐下降至约92％。在0.514和39.8g·m〜（Δ2）之间的范围内的MgCl_（2）量的降低在宽RH范围内诱导in I _（H）的RH，其中40％的RH增加，随着MgCl_（2）的量而增加。从RH和厚度的MgCl_（2）溶液之间的理论关系从Fe板上没有生锈层，发现RHS的溶液膜厚度约为0.18mm，几乎与MgCl_（2）的量无关。另外，含有25.7和39.8g·m〜（α2）MgCl_（2）的厚度测量彼此几乎0.18mm。根据MgCl_（2）的潮解性的性质，试图使用MgCl_（2）的性质来解释 I _（h）的趋势。
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