Suppression of Hydrogen Embrittlement of Al-Zn-Mg Based Alloys by Means of Surface Zinc Plating / 表面亜鉛成膜によるAl-Zn-Mg系合金の環境水素脆性の抑制
- Resource Type
- Journal Article
- Authors
- Hideki Kuwata; Keitaro Horikawa; Makoto Hino; Naoki Fukumuro; 堀川 敬太郎; 日野 実; 福室 直樹; 鍬田 英樹
- Source
- 日本金属学会誌 / Journal of the Japan Institute of Metals and Materials. 2023, 87(4):108
- Subject
- electro zinc plating
hydrogen absorption
hydrogen embrittlement
mechanical properties
surface modification
- Language
- Japanese
- ISSN
- 0021-4876
1880-6880
In the present study, the effect of electro zinc plating on environmental hydrogen embrittlement of 7075-T6 aluminum alloys was investigated by using a slow strain rate testing device which can detect quantitively the amount of hydrogen generated during deformation and fracture. The testing device can also detect traces of hydrogen gas as low as 5 ppb by using a semiconductor gas sensor at ambient pressure. It was revealed that the environmental hydrogen embrittlement of 7075-T6 aluminum alloys was highly suppressed by zinc-based electroplating, while not fully by anodization. The suppression of the hydrogen embrittlement by zinc plating was caused by the protection of original aluminum surfaces during plastic deformation.