海洋環境硫酸鹽還原菌對金屬材料腐蝕機理的研究進展
2021-05-19 01:05:23
hualin
摘要
硫酸鹽還原(yuan)菌 （SRB） 是(shi)一(yi)類廣泛存在于(yu)(yu)自(zi)然環境中(zhong)可以利用硫酸鹽類物質作(zuo)(zuo)為呼吸(xi)代(dai)(dai)謝電(dian)子受體的(de)(de)(de)(de)厭(yan)氧類微(wei)生(sheng)(sheng)物，是(shi)造成金(jin)屬腐(fu)蝕破壞和(he)(he)設(she)備故障(zhang)的(de)(de)(de)(de)主要原(yuan)因之一(yi)，已經成為一(yi)個(ge)重(zhong)要的(de)(de)(de)(de)研究課題。由于(yu)(yu)微(wei)生(sheng)(sheng)物活動的(de)(de)(de)(de)復(fu)雜性，生(sheng)(sheng)物膜內SRB與金(jin)屬表面的(de)(de)(de)(de)相(xiang)互(hu)作(zuo)(zuo)用缺乏深入的(de)(de)(de)(de)研究，其誘導(dao)腐(fu)蝕機(ji)理(li)(li)和(he)(he)腐(fu)蝕過(guo)程(cheng)尚(shang)不清(qing)楚，難(nan)以進(jin)行有效的(de)(de)(de)(de)腐(fu)蝕預測。基于(yu)(yu)此，本文從SRB生(sheng)(sheng)物膜的(de)(de)(de)(de)呼吸(xi)代(dai)(dai)謝角(jiao)度介(jie)紹(shao)了(le)其誘導(dao)金(jin)屬腐(fu)蝕的(de)(de)(de)(de)研究進(jin)展。介(jie)紹(shao)了(le)SRB的(de)(de)(de)(de)生(sheng)(sheng)態特征和(he)(he)厭(yan)氧呼吸(xi)過(guo)程(cheng)，重(zhong)點綜述了(le)SRB腐(fu)蝕機(ji)理(li)(li)，包(bao)括陰極去極化、代(dai)(dai)謝產物腐(fu)蝕、濃差電(dian)池作(zuo)(zuo)用和(he)(he)胞外電(dian)子傳遞等(deng)理(li)(li)論，最后簡要介(jie)紹(shao)了(le)微(wei)生(sheng)(sheng)物腐(fu)蝕 （MIC） 研究的(de)(de)(de)(de)方法與技術手段(duan)。
關鍵詞： 微生物(wu)腐(fu)蝕 ; 硫酸鹽還原菌 ; 腐(fu)蝕機理
Abstract
Sulfate-reducing bacteria （SRB） are a group of diverse anaerobic microorganisms omnipresently in natural habitats and engineered environments, they use sulfur compounds as the electron acceptor for energy metabolism. SRB corrosion is one of major cause for corrosion damages and facility failures, making it an important research topic. Due to the complexity of microbiological activities and that there is a lack of deep understanding of the interaction between biofilms and metal surfaces in the present, therefore, it is still hard to predict and interpret the occurrence and the relevant mechanism of the SRB corrosion. In this review, the ecological characteristics and anaerobic respiration of SRB are introduced, focusing on the SRB corrosion mechanism, including cathodic depolarization, metabolite corrosion, concentration battery action, and extracellular electron transfer theories. Finally, the methods and tools of MIC research are briefly introduced.
Keywords： microbiological influenced corrosion ; SRB ; corrosion mechanism
