METHOD FOR ESTIMATING CORROSION OF STAINLESS STEEL CAUSED BY MICROORGANISMS

PROBLEM TO BE SOLVED: To estimate corrosion occurrence of a structure due to microorganisms, faithfully reflecting activities of microorganisms in the real natural environment. SOLUTION: Test piece 1 of stainless steel is immersed on-site and directly in water in a dam or the like. A spontaneous pot...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	HOJO KATSUYA, RYO KANEHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	BEER BIOCHEMISTRY 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 COMPOSITIONS OR TEST PAPERS THEREFOR CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL ORENZYMOLOGICAL PROCESSES DIFFUSION TREATMENT OF METALLIC MATERIAL ENZYMOLOGY INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEICACIDS OR MICROORGANISMS METALLURGY MICROBIOLOGY 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 MUTATION OR GENETIC ENGINEERING NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE PHYSICS PROCESSES OF PREPARING SUCH COMPOSITIONS SPIRITS TESTING VINEGAR WINE
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To estimate corrosion occurrence of a structure due to microorganisms, faithfully reflecting activities of microorganisms in the real natural environment. SOLUTION: Test piece 1 of stainless steel is immersed on-site and directly in water in a dam or the like. A spontaneous potential of the test piece is measured at a given time interval. The measurement result is stored in a data logger. The stored spontaneous potential is compared with a corroded-crevice repassivation potential of the test piece 1 measured using the water in the dam or the like. It is judged as corrosion occurrence due to microorganisms if the spontaneous potential is higher than the corroded-crevice repassivation potential. This test piece 1 is fixed to a tool 2, and a float 3 is provided in the tool 2 so that the test piece 1 is always immersed at a constant depth to enable an accurate evaluation under a constant condition. COPYRIGHT: (C)2008,JPO&INPIT