Scholarlink

<p>The impact of Bacillus subtilis (B. subtilis) on the corrosion behavior (microbiologically influenced corrosion) of two aluminum alloys—7075 aluminum alloy (AA7075) and 2024 aluminum alloy (AA2024)—is investigated in a high-salinity environment. The corrosion mechanism is explored by observing the bacterial growth process and the corresponding measurements. The assessment involves the analysis of surface morphology, corrosion mass loss, and electrochemical tests. Surface morphology reveals the development of B. subtilis and biofilm formation on the surface of the aluminum alloys. Both mass loss and electrochemical tests illustrate the corrosion inhibition effect of B. subtilis on aluminum alloys in a high-salt environment. AA7075 alloy was more affected by the biofilm and had a more pronounced corrosion inhibition effect. After 10&#xa0;d of testing, in B. subtilis group, AA7075 and AA2024 bode values were elevated by 0.32 × 10<sup>4</sup> and 0.24 × 10<sup>4</sup> Ω, respectively. The open circuit potential of AA2024 decreased by −0.107 A/cm<sup>2</sup> under the influence of bacteria, and the dynamic potentiodynamic polarization curve shifted significantly to the left.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Corrosion behavior of aluminum alloys by Bacillus subtilis in artificial seawater

  • 期刊论文

  • 发表日期：

    2025年6月18日

查看全文
  • Ya-hui Hu,
  • Fu-yan Kang,
  • Qian-yun Tan,
  • Shu-ying Pu,
  • Li-xiang Yang,
  • Xiao-ya Ding,
  • Wei-hua Li,
  • Fa-qian Liu

摘要

The impact of Bacillus subtilis (B. subtilis) on the corrosion behavior (microbiologically influenced corrosion) of two aluminum alloys—7075 aluminum alloy (AA7075) and 2024 aluminum alloy (AA2024)—is investigated in a high-salinity environment. The corrosion mechanism is explored by observing the bacterial growth process and the corresponding measurements. The assessment involves the analysis of surface morphology, corrosion mass loss, and electrochemical tests. Surface morphology reveals the development of B. subtilis and biofilm formation on the surface of the aluminum alloys. Both mass loss and electrochemical tests illustrate the corrosion inhibition effect of B. subtilis on aluminum alloys in a high-salt environment. AA7075 alloy was more affected by the biofilm and had a more pronounced corrosion inhibition effect. After 10 d of testing, in B. subtilis group, AA7075 and AA2024 bode values were elevated by 0.32 × 104 and 0.24 × 104 Ω, respectively. The open circuit potential of AA2024 decreased by −0.107 A/cm2 under the influence of bacteria, and the dynamic potentiodynamic polarization curve shifted significantly to the left.