STAINLESS STEEL LOCAL CORROSION SUPPRESSING METHOD

PROBLEM TO BE SOLVED: To provide a stainless steel local corrosion suppressing method using chemical species capable of suppressing local corrosion efficiently.SOLUTION: Provided is the stainless steel local corrosion suppressing method used in a wet environment, and a nitrite ion having mol concent...

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Bibliographische Detailangaben
Hauptverfasser:	FUKAYA YUICHI, HIRASAKI TOSHIFUMI, TAKAMORI KENRO, KUMAGAI KATSUHIKO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a stainless steel local corrosion suppressing method using chemical species capable of suppressing local corrosion efficiently.SOLUTION: Provided is the stainless steel local corrosion suppressing method used in a wet environment, and a nitrite ion having mol concentration equal to or more than 0.1 times with respect to mol concentration of a chloride ion contained in water content coexists in the water content contacting to the stainless steel. 【課題】効果的に局部腐食を抑制することができる化学種を用いた新たなステンレス鋼の局部腐食抑制方法を提供する。【解決手段】湿潤環境におけるステンレス鋼の局部腐食抑制方法であって、ステンレス鋼に接触する水分において、水分中に含まれる塩化物イオンのモル濃度に対して、０．１倍以上のモル濃度の亜硝酸イオンを共存させるステンレス鋼の局部腐食抑制方法。【選択図】なし