Rhamnolipid as an eco-friendly corrosion inhibitor for microbiologically influenced corrosion
Rhamnolipid as an eco-friendly corrosion inhibitor for microbiologically influenced corrosion
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鼠李糖脂作为一种环保型缓蚀剂，用于应对微生物影响的腐蚀
DOI：
10.1016/j.corsci.2022.110390
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发表时间：
2022
影响因子：
8.3
通讯作者：
Fuhui Wang
中科院分区：
文献类型：
--
作者：
Zhong Li;Xinyi Yuan;Mingyue Sun;Zhengtao Li;Dawei Zhang;Yuhao Lei;Mingxing Zhang;Yongqiang Fan;Dake Xu;Fuhui Wang
可持续、无毒缓蚀剂的开发备受关注。研究发现铜绿假单胞菌产生的鼠李糖脂（RH）能有效抑制X70碳钢在模拟海水中的腐蚀。此外，RH 经验证可保护 X70 碳钢免受地衣芽孢杆菌（一种典型的腐蚀细菌）引起的微生物腐蚀 (MIC)。与未处理条件相比，添加 0.1% (m/v) RH 后，在地衣芽孢杆菌存在下，腐蚀电流密度降低了 68.4%。 RH浓度高于125 mg/L时，地衣芽孢杆菌的生长受到显着抑制。 RH 的抗菌和缓蚀作用使得 RH 适合用于 MIC 抑制。 • 由铜绿假单胞菌合成的鼠李糖脂(RH) 被确定为绿色腐蚀抑制剂。 • RH 可抑制地衣芽孢杆菌引起的 X70 钢腐蚀。 • RH 抑制细菌生长并增加X70 碳钢的表面亲水性。
The development of sustainable and non-toxic corrosion inhibitors attracts much attentions. Herein, the rhamnolipid (RH) produced by Pseudomonas aeruginosa was found to effectively inhibit the corrosion of X70 carbon steel in simulated seawater. Moreover, RH was verified to protect X70 carbon steel against the microbiologically influenced corrosion (MIC) caused by Bacillus licheniformis , a typical corrosive bacterium. The addition of 0.1% (m/v) RH reduced the corrosion current density by 68.4% in the presence of B. licheniformis compared with untreated condition. The growth of B. licheniformis was significantly inhibited with RH concentration higher than 125 mg/L. The antimicrobial and corrosion inhibition effects make RH suitable for MIC inhibition. • Rhamnolipid (RH) synthesized by P. aeruginosa is identified as a green corrosion inhibitor. • Corrosion of X70 steel caused by B. licheniformis is inhibited by RH. • RH inhibits bacterial growth and increases surface hydrophilicity of X70 carbon steel.