scavenger

Japanese: scavenger
scavenger

...The second method involves selecting the right material that will not corrode in the same environment, and various corrosion-resistant alloys are used. The third method is to use corrosion inhibitors that use chemicals to suppress the action of reactive substances in the environment. This includes not only various rust inhibitors, but also scavengers that remove reactive substances (examples include sodium sulfite and hydrazine used in boiler water treatment). The fourth method is cathodic protection, which uses electrochemical principles.

*Some terminology explanations that mention "scavenger" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…第2は同一環境で腐食を起こさないような適材選定を行うことで,各種の耐食合金が利用される。第3は環境中の反応物質の作用を薬剤で抑制する腐食抑制剤を用いる方法であり,これには各種の防錆(ぼうせい)剤のほかに反応物質を除去してしまうスカベンジャーscavenger(ボイラー用水処理に使う亜硫酸ナトリウム,ヒドラジンなどがその例)も含めて考える。第4は電気化学的な原理を利用した電気防食である。…

※「scavenger」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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