Investigation of Corrosion Fatigue Phenomena in Transient Zone and Preventive Coating and Blade Design against Fouling and Corrosive Environment for Mechanical Drive Turbines

For mechanical drive steam turbines, the investigation results of corrosion fatigue phenomena in the transient zone are introduced, including basic phenomena on expansion line and actual design and damage experience. These results were analyzed from the standpoint of stress intensity during the star...

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Bibliographic Details
Published inInternational journal of fluid machinery and systems Vol. 1; no. 1; pp. 121 - 139
Main Authors Hata, Satoshi, Nagai, Naoyuki, Yasui, Toyoaki, Tsukamoto, Hiroshi
Format Journal Article
LanguageEnglish
Published 01.01.2008
Subjects
Blades
Coating
Corrosion environments
Corrosion fatigue
Design engineering
Fouling
Mechanical drives
Washing
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Summary:For mechanical drive steam turbines, the investigation results of corrosion fatigue phenomena in the transient zone are introduced, including basic phenomena on expansion line and actual design and damage experience. These results were analyzed from the standpoint of stress intensity during the start of cracking. In order to resolve such problems, preventive coating and blade design methods against fouling and corrosive environments are developed. Detailed evaluation test results are given for coating performance using a unique test procedure simulating fouling phenomena and washing conditions. Finally, the results of the successful modification of internals and on-line washing results on site are introduced.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1882-9554
1882-9554
DOI:10.5293/IJFMS.2008.1.1.121