利用水中摩擦力对铝进行氢充电
Summary
为了在铝和铝合金中引入大量的氢，开发了一种新的加氢方法，称为水过程中摩擦。
Abstract
利用水摩擦（FW）程序，研制出一种铝氢充水的新方法。根据水与非氧化物涂层铝之间的化学反应，此程序可以轻松地将大量氢气引入铝中。
Introduction
一般来说，铝基合金比钢具有更高的耐环境氢脆性。铝合金对氢脆性高，是由于合金表面的氧化膜阻挡了氢气的进入。为了评估和比较铝合金之间的高脆性敏感性，氢充电通常在机械测试1、2、3、4、5、6、7、8、9、10、11、12、13、14之前进行。 15，16，17.然而，众所周知，氢充铝并不容易，即使使用氢气充电方法，如阴极充电15，湿空气16下缓慢应变率变形，或氢等离子气体充电17。氢充铝合金的难度也在于铝合金表面的氧化膜。我们假设，如果我们能在水中连续去除氧化膜，铝合金中就会引入大量的氢。热力学18，纯铝没有氧化物膜很容易与水反应，并产生氢气。在此基础上，基于水与非氧化物铝的化学反应，开发了铝合金加氢的新方法。该方法能够简单地将大量的氢气添加到铝合金中。
Protocol
1. 材料准备 使用由铝镁硅合金制成的 1 mm 厚板，其质量%为 Mg，0.8 质量%为 Si（Al-Mg-Si）。 用 Al-Mg-Si 合金板制作测试件，其仪表长度为 10 mm，宽度为 5 mm。 使用空气炉在 520°C 下对测试件进行 1 小时的封火。在水中以溶液进行热处理。 在175°C下对测试件进行18小时发火，作为峰值老化热处理（T6-temper）。 使用不含水的碳化硅砂纸（#2000）抛光测试件表面。 …
Representative Results
FW 程序的氢气生成/吸收图2显示了在含有不同量铁的Al-Mg-Si合金的FW过程中产生的氢气行为，质量%为0.1至0.7质量%。当搅拌器开始旋转时，试样持续排放大量氢气。这表明氢是由合金表面和水之间的摩擦引起的化学反应产生的。此外，FW 过程中水的 pH 值从 6.5–7.5 略有增加，如图3所示。根据Pourbaix19提出的电化学图，FW程?…
Discussion
FW 程序的一个重要方面是将两个试样连接到磁力搅拌器。由于搅拌棒的中心成为非摩擦区，因此最好避免在搅拌棒中心附着试样。
控制搅拌杆的旋转速度也很重要。当转速超过 240 rpm 时，很难将反应容器保持在磁力搅拌器的舞台上。高速执行 FW 程序时，需要将反应容器固定到磁搅拌器的阶段。
由于FW程序的氢充电是基于水与非氧化物涂层铝表面之间的化…
Divulgazioni
The authors have nothing to disclose.
Acknowledgements
这项工作得到了日本大阪轻金属教育基金会的部分资助。
Materials
| Air furnace | GC | QC-1 | |
| Aluminum alloy plates | Kobe Steel | Al/1.0 mass% Mg/0.8 mass% Si | |
| Electric balance | A&D | HR-200 | |
| Glass container | Custom made | ||
| Magnetic stirrer | CORNING | PC-410D | |
| Optical Comparator | NIKON | V-12B | |
| pH meter | Sato Tech | PH-230SDJ | |
| Quartz tube | Custom made | ||
| Rotary polishing machine | IMT | IM-P2 | |
| Secondary electrom microscope | JOEL | JSM-5310LV | |
| Sensor gas chromatograph | FIS Inc. | SGHA | |
| Silicon carbide emery paper | IMT | 531SR | |
| Tensile testing machine | Toshin Kogyo | SERT-5000-C | |
| Tubular furnace | Honma Riken | Custom made |
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Citazione di questo articolo
Horikawa, K., Kobayashi, H. Hydrogen Charging of Aluminum using Friction in Water. J. Vis. Exp. (155), e60711, doi:10.3791/60711 (2020).