Corrosion behavior of Stainless Steel Welds by Microbes in Marine Water

• MIYANO Yasuyuki

  Graduate Student of Osaka University

• YAMAMOTO Michiyoshi

  Hitachi, Co., Ltd.

• WATANABE Kazuya

  Marine Biotechnology Institute Co., Ltd. Kamaishi Laboratories

• OMORI Akira

  Joining and Welding Research Institute, Osaka University

• KIKUCHI Yasushi

  Joining and Welding Research Institute, Osaka University (Present Status : Prof. Emeritus of Osaka University)

Bibliographic Information

Other Title

• 海水中の好気性細菌によるSUS316L鋼溶接部の微生物腐食
• カイスイチュウ ノ コウキセイ サイキン ニ ヨル SUS316L コウ ヨウセツブ ノ ビセイブツ フショク

Abstract

Biocorrosion was suspected in the corrosion failure of a cooling system of a stainless piping welded joint, carrying marine water. Marine water, which is used for cooling water in a plant was transferred to the laboratory and used for experiments. In the first experiment, weld metal samples were exposed to the test solution for 56 days (marine water and sterilized marine water (control)). The surface condition of experimental coupons was observed using a Scanning Electron Microscope (SEM). In another experiment, the free corrosion potential of these materials was monitored for 56 days. Pitting corrosion was found in the coupons exposed to marine water. Free corrosion potential ennoblement was found to be significant compared to the controls. It was suspected that this corrosion case was biocorrosion. In the second experiment, coupons were exposed to diluted nutrient medium containing single cultures of microbes isolated from the biocorrosion causing marine water sample used for the first experiment. After the exposure test, surface condition of the experimental coupon was observed using SEM. Pitting corrosion sites was found in coupons exposed to some of the isolates. The results indicate that they contribute to the corrosive effect of the SUS316L welds.<br>

Journal

• QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

  QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 22 (3), 443-450, 2004

  JAPAN WELDING SOCIETY

Keywords

• Biocorrosion
• Microbes
• Stainless Steel
• Weld
• Pitting Corrosion

Details

• CRID: 1390282679703298688
• NII Article ID: 110003422446
• NII Book ID: AN1005067X
• DOI: 10.2207/qjjws.22.443
• COI: 1:CAS:528:DC%2BD2cXotVOqsLY%3D
• ISSN: 24348252
• ISSN: 02884771
• NDL BIB ID: 7063831
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7063831
• Web Site: https://www.jstage.jst.go.jp/article/qjjws/22/3/22_3_443/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed