Corrosion of a stainless steel by aerobic microorganisms in waste water treatment facilities

被引：0

作者：

Shinoda N. ^{[1
]}

Shimada T. ^{[1
]}

机构：

[1] Solution Div. (Kawasaki), JFE Techno-Research Co. Ltd, Kawasaki-ku, Kawasaki, 210-0855

来源：

Zairyo to Kankyo/ Corrosion Engineering | 2011年 / 60卷 / 11期

关键词：

Microbially influenced corrosion; Open circuit potential; Repassivation potential for crevice corrosion; Stainless steel; Waste water treatment facilities;

D O I：

10.3323/jcorr.60.483

中图分类号：

学科分类号：

摘要：

In activated sludge treatment facilities, the waste water is purified by microbial metabolic processes. In order to understand the corrosion of SUS304 stainless steels in this facilities, investigation by microbial analysis and electrochemical measurements was conducted. Aerobic bacteria were detected in corroded weld parts. Open circuit potentials (E oc) of corroded facilities were more noble than that of the stainless steel in controlled waste water and that of no corrosion facilities. Repassivation potentials for crevice corrosion (E R,CREV) of the SUS304 stainless steel were measured in the laboratory and a E oc> E R,CREV relation was confirmed. It was considered that the cause of the corrosion was the increase of the potential of SUS304 stainless steels by microorganisms action and a formation of crevice by biofilm.

引用

页码：483 / 486

页数：3