ABSTRACT

This study aimed to study the inhibitory effect of the Myrtus communis extract on the microbiologically influenced corrosion (MIC) induced by sulphate reducing bacterial (SRB) consortium in the cooling tower water. The SRB consortium was grown on the surface of the st37 steel and its effects on the surface corrosion were evaluated. The results of electrochemical measurements and microscopic observations revealed that the extract could significantly reduce the corrosion by inhibiting the SRB biofilm formation. The addition of the 0.781 mg ml⁻¹ of the extract into the SRB medium led to a considerable reduction (about seven times) in the corrosion process of the st37 steel and kept it at an almost constant value. Based on Gas chromatography-mass spectrometry analysis, 2-Furancarboxaldehyde, 5-(hydroxymethyl) (42.396%) was the most abundant compound identified in the plant extract. The molecular identification has proved that most population of SRB consortium was related to Desulfovibrio vulgaris species.

摘要

本研究旨在研究桃金娘提取物对冷却塔水中硫酸盐还原细菌（SRB）财团引起的微生物影响的腐蚀（MIC）。SRB联合体生长在st37钢的表面上，并评估了其对表面腐蚀的影响。电化学测量和显微镜观察的结果表明，提取物可通过抑制SRB生物膜的形成来显着减少腐蚀。将0.781 mg ml ^-1的萃取物添加到SRB介质中，导致st37钢的腐蚀过程显着降低（约7倍），并保持在几乎恒定的值。根据气相色谱-质谱分析，2-呋喃甲醛，5-（羟甲基）（42.396％）是植物提取物中鉴定到的最丰富的化合物。分子鉴定证明，SRB财团的大多数种群与寻常脱硫弧菌有关。