Novel Inhibitors of Microbiologically Inducing Corrosion of A3 Steel in Anaerobic Environment
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摘要: 通过微生物方法、失重法和表面分析3种方法研究了4种缓蚀杀菌剂的杀菌作用,以及A3钢在无菌培养液和培养液加硫酸盐还原菌(SRB)的厌氧体系中加入这4种缓蚀杀菌剂的腐蚀行为.结果表明:SRB加速了A3钢的点蚀破坏;缓蚀杀菌剂能够影响SRB的生成规律,抑制SRB和Cl－的腐蚀破坏,使腐蚀率降低.在4种缓蚀杀菌剂中,性能最好的为BHA-2,其缓蚀率为82.4%,同时兼有缓蚀和杀菌双重功效,且明显优于市场上广泛使用的1227.Abstract: The effect of sterilization of four inhibitors(BHA-1,BHA-2,BHA-3,1227)and the behaviors of microbiologically inducing corrosion of A3 steel in 3.5%NaCl solutions with and without sulfate-reducing bacteria(SRB) in anaerobic conditions were investigated by using microbiologic method, weight-loss method and surface analysis. It was found that the pitting corrosion attack of A3 steel was accelerated by SRB. And the inhibitors could affect the growth process of SRB and inhibit the corrosion attack of SRB and Cl-, hence, the corrosion rate of A3 steel was decreased. It was demonstrated that the inhibitors had the double function of inhibition-sterilization. One of four inhibitors, BHA-2 gave the best result of inhibition and sterilization, and its efficiency of inhibition-sterilization was better than 1227 bactericide which was usually used to inhibit the corrosion caused by SRB.
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Key words:
- corrosion /
- sulfate-reducing bacteria /
- corrosion inhibitors /
- A3 steel
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