| Co-Investigator(Kenkyū-buntansha) |
北村 昌也 大阪市立大学, 大学院工学研究科, 教授 (20244634)
中西 猛 大阪市立大学, 大学院工学研究科, 准教授 (20422074)
辻 幸一 大阪市立大学, 大学院工学研究科, 教授 (30241566)
有吉 欽吾 大阪市立大学, 大学院工学研究科, 准教授 (80381979)
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| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2019: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
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| Outline of Final Research Achievements |
Volume of specific bacterial cells and extracellular polysaccharides in biofilm were quantified by using a fluorescent DNA probe and a confocal laser scanning microscope. Such microscopic technique was also useful to observe distribution of metal corrosive bacterial cells in the BF and local corrosion under the BF. It was also shown that pickling is effective as a countermeasure against microbial corrosion of stainless steel welds.
A cases study indicated that the Rhodocyclaceae sp. bacteria living in a BF increased the corrosion rate in a microaerobic environment. When a hypochlorous acid-based disinfectant was added to such a system, corrosion rate in a microaerophile environment significantly decreased, indicating that the hypochlorous acid-based disinfectant is effective as a countermeasure against microbially influenced corrosion.
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