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A New concept sensor to determine water chemistry conditions in high temperature water

高温水中における水化学測定のための新型高温水化学センサ

佐藤 智徳 ; 三輪 幸夫; 塚田 隆 ; 内田 俊介

Sato, Tomonori; Miwa, Yukio; Tsukada, Takashi; Uchida, Shunsuke

特定の金属の表面では、腐食環境に応じて、特定の半電池反応が生じる。この現象を利用し、複数の金属間の電位差を互いに測定することで、逆に金属の曝されている腐食環境の特徴を評価できると考えられる。本研究では、純金属電極の自然電位に関して、高温水中に含まれる酸素濃度と過酸化水素濃度依存性を取得し、センサの原理を検証した。

At the surface of a pure metal, a particular half cell reaction corresponding to an exposed water chemistry condition occurs. In principle, O$$_{2}$$ and H$$_{2}$$O$$_{2}$$ concentrations in high temperature water can be determined by the comparison of the redox potential responses of some kind of pure metals corresponding to exposed condition. In order to confirm the concept of sensor, responses of the redox potentials of pure metals to the changes in O$$_{2}$$ and H$$_{2}$$O$$_{2}$$ concentrations were measured under non-irradiated condition and compared with the calculated potentials.

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