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<p>The increased use of biodiesel is expected to lead to more microbial corrosion, fouling and fuel degradation issues. In this context, we have analysed the metal, fuel and microbiology of a fouled diesel tank which had been in service for over 30 years. The fuel itself, a B7 biodiesel blend, was not degraded, and—although no free water phase was visible—contained a water content of ~60 ppm. The microbial community was dominated by the fungus <i>Amorphotheca resinae,</i> which formed thick, patchy biofilms on the tank bottom and walls. The tank sheets, composed of galvanised carbon steel, were locally corroded underneath the biofilms, up to a depth of a third of the sheet thickness. On the biofilm-free surfaces, Zn coatings could still be observed. Taken together, <i>A. resinae</i> was shown to thrive in these water-poor conditions, likely enhancing corrosion through the removal of the protective Zn coatings.</p>

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A 30-year-old diesel tank: fungal-dominated biofilms cause local corrosion of galvanised steel

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月16日

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  • Ruben Gerrits,
  • Biwen An Stepec,
  • Ralph Bäßler,
  • Roland Becker,
  • Matthias Dimper,
  • Ines Feldmann,
  • Kira L. Goff,
  • Jens Günster,
  • Andrea Hofmann,
  • René Hesse,
  • Sarah Kirstein,
  • Ulrich Klein,
  • Tatjana Mauch,
  • Meina Neumann-Schaal,
  • Ozlem Ozcan,
  • Nicole M. Taylor,
  • Julia Schumacher,
  • Yin Shen,
  • Heike Strehlau,
  • Matthias Weise,
  • Jacqueline Wolf,
  • Andrey Yurkov,
  • Lisa M. Gieg,
  • Anna A. Gorbushina

摘要

The increased use of biodiesel is expected to lead to more microbial corrosion, fouling and fuel degradation issues. In this context, we have analysed the metal, fuel and microbiology of a fouled diesel tank which had been in service for over 30 years. The fuel itself, a B7 biodiesel blend, was not degraded, and—although no free water phase was visible—contained a water content of ~60 ppm. The microbial community was dominated by the fungus Amorphotheca resinae, which formed thick, patchy biofilms on the tank bottom and walls. The tank sheets, composed of galvanised carbon steel, were locally corroded underneath the biofilms, up to a depth of a third of the sheet thickness. On the biofilm-free surfaces, Zn coatings could still be observed. Taken together, A. resinae was shown to thrive in these water-poor conditions, likely enhancing corrosion through the removal of the protective Zn coatings.