ＮＡＳ電池用アルミニウムの内壁に施工した高Ｃｒ‐Ｆｅ合金プラズマ溶射皮膜の貫通気孔格納容器の測定
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概要
- 論文の詳細を見る
Test methods were studied for determining whether permeable pores exist in high Cr-Fe alloy plasma spray coatings applied to the inner surface NAS battery Al containers. Al containers were first filled with a NaOH solution. If permeable pores were to exist in the sprayed coating, the NaOH solution would reach the container wall through these pores, react with the Al, and generate H2 gas. When the Al in a container came into contact with the 0.25-6 mol•L-1 NaOH solution, the Al dissolved and H2 gas bubbles were immediately generated. However, the 75 mass%Cr-Fe alloy plasma spray coating itself does not react with the NaOH solution and does not generate H2 gas. When Al containers with 75 mass%Cr-Fe alloy plasma spray coating of different porosities were tested, results showed that the higher the porosity of the coating, the greater the amount of H2 gas produced. Thus the presence of permeable pores could be easily detected. When Al containers have 75 mass%Cr-Fe alloy plasma spray coating applied under optimal spray conditions for mass production, the sprayed coatings were relatively dense. Therefore, when the NaOH solution was put into the container, H2 gas was not immediately found. H2 gas began to generate four minutes after the NaOH solution was added. It was confirmed that the amount of H2 gas generated is proportionate to the existence of permeable pores in the sprayed coating and the size of the pores.
- The Japan Institute of Metals and Materialsの論文
The Japan Institute of Metals and Materials | 論文
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