Chemical cleaning method used for secondary loop valve cage

The invention belongs to the technical field of nuclear power maintenance, and particularly relates to a chemical cleaning method used for a secondary loop valve cage. The method comprises the steps of using an alkaline solution for soaking and cleaning of the secondary loop valve cage; using water...

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Bibliographische Detailangaben
Hauptverfasser:	YOU ZHAOJIN, WANG JINFANG, LIU QIANG, SUN QIN, GUO PENGFEI, WANG CHENGLIN, ZHUANG JIAXIANG, FEI ZHISONG, TANG HAO, JIANG KAICHUAN, GU WEIBAI, ZHANG MINGKE, WENG YUNFENG, SI XIANGUO, HU YUEHUA, SHEN JUN, WANG ANNING, ZHANG WENXING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR 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 SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	The invention belongs to the technical field of nuclear power maintenance, and particularly relates to a chemical cleaning method used for a secondary loop valve cage. The method comprises the steps of using an alkaline solution for soaking and cleaning of the secondary loop valve cage; using water for cleaning the secondary loop valve cage which is soaked and cleaned by the alkaline solution; when a residual alkaline solution on the secondary loop valve cage is cleared, using an acid solution for soaking and cleaning the secondary loop valve cage; using water for cleaning the secondary loop valve cage which is soaked and cleaned by the acid solution; when a residual acid solution on the secondary loop valve cage is cleared, using a passivating agent for passivating the secondary loop valve cage; using the water for cleaning the passivated secondary loop valve cage until a residual passivating agent on the secondary loop valve cage is cleared; and when the residual passivating agent onthe secondary loop valve