Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Vellore, 632115, Tamil Nadu, India.
Department of Botany and Microbiology, College of Science King Saud University, Riyadh, 11451, Saudi Arabia.
Chemosphere. 2021 Feb;265:129075. doi: 10.1016/j.chemosphere.2020.129075. Epub 2020 Nov 26.
In this review article, illustrating the impact and fundamental stuff of microbially influenced corrosion (MIC) along with mechanism, maintenance of materials, human life, wellbeing and inhibitors for cooling towers. Corrosion is a natural mechanism of oxidation and reduction of metal ions by chemical and electrochemical processes and microorganism accumulation. MIC occurs through the aggregation of microbes which can be secreting the extra polymeric substances (EPS) that oxidation of the metal surface. According to the reviews, in the cooling water system, the corrosion begins in the anode charge because its oxidation reaction quickly takes place on the metal surface than the cathode charge. Annihilate the corrosion process needs certain helper substances such as chemical or green compounds, called inhibitors. Corrosion inhibitors typically adopt the adsorption mechanism due to the presence of organic hetero atoms. Chemical and green inhibitors are used to prevent corrosion processes and since ancient times, vast quantities of chemical inhibitors have been used in industry due to their effectiveness and consistency. But still, the chemical inhibitors are more toxic to humans and the environment. Instead of chemical inhibitors, green inhibitors (natural products like plant leaves, flowers, stem, buds, roots and sea algae) are developed and used in industries. Generally, green inhibitors contain natural compounds, high inhibition efficiency, economic, eco- and human-friendly, and strong potential features against corrosion. Thus, a lot of research is ongoing to discover the green inhibitors in various parts of plants and seaweeds.
在这篇综述文章中，阐述了微生物影响腐蚀（MIC）的影响和基本原理，以及其机制、材料的维护、人类的生命、健康和冷却塔抑制剂。腐蚀是金属离子通过化学和电化学过程以及微生物积累的氧化和还原的自然机制。MIC 通过微生物的聚集发生，微生物可以分泌额外的聚合物物质（EPS），从而氧化金属表面。根据评论，在冷却水系统中，腐蚀始于阳极电荷，因为其氧化反应在金属表面上比阴极电荷更快地发生。消灭腐蚀过程需要一定的辅助物质，如化学或绿色化合物，称为抑制剂。腐蚀抑制剂通常由于存在有机杂原子而采用吸附机制。化学和绿色抑制剂用于防止腐蚀过程，自古以来，由于其有效性和一致性，大量的化学抑制剂已在工业中使用。但是，化学抑制剂对人类和环境的毒性仍然较大。而不是化学抑制剂，绿色抑制剂（植物叶片、花朵、茎、芽、根和海藻等天然产品）已在工业中开发和使用。通常，绿色抑制剂含有天然化合物，具有高效抑制作用、经济、生态和对人类友好以及抗腐蚀的强大潜力。因此，正在进行大量研究以在植物和海藻的各个部位发现绿色抑制剂。
