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采用循环极化、微生物分析法、扫描电镜及表面能谱分析等方法,研究了磁场对316L不锈钢在含硫酸盐还原菌(SRB)的土壤模拟溶液中的腐蚀行为。结果表明,磁场可以抑制SRB的生长;未外加磁场时316L不锈钢表面膜层以局部堆积为主,加有磁场时,局部堆积明显减小,膜层均匀致密的排列于基体表面;无论有或没有外加磁场,316L不锈钢表面均发生钝化膜破裂型点蚀,未外加磁场时的点蚀电位低于加有磁场时的。在相同的浸泡时间,未外加磁场时循环极化滞后环面积明显比加有磁场时的大,说明磁场可以有效抑制316L不锈钢点蚀的形成与发展,降低316L不锈钢的点蚀诱发能力。
The effects of magnetic field on the corrosion behavior of 316L stainless steel in soil simulated solution containing sulfate-reducing bacteria (SRB) were studied by cyclic polarization, microbiological analysis, scanning electron microscopy and surface energy spectrum analysis. The results show that the magnetic field can restrain the growth of SRB. When the magnetic field is not applied, the local deposition of the 316L stainless steel surface layer is mainly localized. When the magnetic field is applied, the local accumulation is obviously reduced and the film layer is evenly and densely arranged on the surface of the substrate. In addition, the pitting corrosion of passivation film occurred on the surface of 316L stainless steel, and the pitting potential was lower than that of the case without magnetic field. In the same immersion time, the area of cyclic polarization hysteresis loop is obviously larger than that of the magnetic field when the magnetic field is not applied, which shows that the magnetic field can effectively inhibit the formation and development of pitting corrosion of 316L stainless steel and reduce the pitting inducement of 316L stainless steel.