Corrosion Inhibition of Carbon Steel by Ruthenium Salt in Concentrated Lithium Bromide Solution at Elevated Temperature

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  • Tanno Kazuo
    Department of Applied Chemistry, Faculty of Engineering, Iwate University
  • Saito Shiro
    Department of Applied Chemistry, Faculty of Engineering, Iwate University
  • Ito Masahiko
    Hitachi Research Laboratory, Hitachi Ltd.

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Other Title
  • 高温濃厚臭化リチウム水溶液中におけるルテニウム塩による炭素鋼の腐食抑制
  • コウオン ノウコウ シュウカ リチウム スイヨウエキチュウ ニ オケル ルテニ

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Description

Corrosion inhibition of carbon steel by metal salts in 12.5mol/dm3 LiBr solution, which is used as a practical absorbent in an absorption refrigeration system at the highest temperature of 433K, was studied. Among salts of iron, cobalt, nickel, ruthenium, rhodium, palladium, platinum and copper examined, ruthenium salt was the most effective inhibitor on carbon steel in the presence of LiOH. The best inhibition effect of ruthenium salt and LiOH was obtained at respective concentration of 8×10-4 and 0.15mol/dm3. In this case, conversion of Fe (II) to magnetite was accelerated by the inhibitor and a dense protective film was formed on carbon steel.

Journal

  • CORROSION ENGINEERING

    CORROSION ENGINEERING 35 (8), 455-461, 1986

    Japan Society of Corrosion Engineering

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