水溶液中LC4铝合金的微生物腐蚀缓蚀杀菌剂

 通过电化学极化、表面分析等方法,研究了 LC4铝合金在无菌培养液和培养液加硫酸盐还原菌( sulfate-reducing bacteria,简称 SRB)的厌氧体系中加入缓蚀杀菌剂的腐蚀行为。实验结果表明 :SRB能加速LC4铝合金的腐蚀破坏,其腐蚀破坏行为属于点蚀腐蚀机理;加入缓蚀杀菌剂能够影响 SRB的生长规律,抑制 SRB和 Cl-离子对 LC4铝合金的腐蚀破坏。在所研究的 4种缓蚀杀菌剂中,BHA-2缓蚀杀菌剂具有最好的缓蚀和杀菌双重功效,且明显优于市场上广泛使用的 1 2 2 7。

STUDY ON INHIBITORS OF MICROBIOLOGICALLY INDUCED CORROSION OF LC4 ALUMINUM ALLOY IN AN AQUEOUS SOLUTIONS

The behaviors of microbiologically induced corrosion of LC4 aluminum alloy in 3.5%NaCl solutions with and without sulfate-reducing bacteria(SRB) under anaerobic conditions were investigated by using electrochemical polarization and surface analysis. It was found that the SRB could reduce the pitting corrosion on the surface of LC4 aluminum alloy. At the same time, the corrosion attack of LC4 aluminum alloy was accelerated by SRB. The corrosion of LC4 aluminum alloy in the environment containing SRB was pitting. The efficiencies of inhibition and sterilization of four inhibitors(BHA-1,BHA-2,BHA-3,1227), were researched for LC4 alloy corrosion in solutions containing SRB. It was demonstrated that the inhibitors had the double function of inhibition-sterilization, and they changed the growth processes of SRB. One of them, BHA-2 gave the best result of inhibition and sterilization, and its efficiency of inhibition-sterilization was better than that of 1227 bactericide, which was usually used to inhibit the corrosion caused by SRB. When BHA-2 was added only to 30×10\+\{-5\}, it could inhibit the action of SRB.