Electrochemical study of stainless steel corrosion by marine sulphate-reducing bacteria

被引：0

作者：

Sahrani, Fathul Karim ^{[1
]}

Ibrahim, Zaharah ^{[2
]}

Aziz, Madzlan ^{[2
]}

Yahya, Adibah ^{[2
]}

机构：

[1] Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Environm & Nat Resource Sci, Bangi 43600, Selangor DE, Malaysia

[2] Univ Teknol Malaysia, Fac Sci, Dept Biol Chem, Skudai 81310, Johor Darul Tak, Malaysia

来源：

SAINS MALAYSIANA | 2008年 / 37卷 / 02期

关键词：

sulphate-reducing bacteria; stainless steel; electrochemical test; Tafel plots;

D O I：

暂无

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Corrosion caused by sulphate-reducing bacteria (SRB) isolated from seawater nearby to Pasir Gudang has been studied. The test coupon was a AISI 304 stainless steel. Potential and corrosion rate measurements were carried out in various types of culturing solutions, with SRB1, SRB2, combination of SRB1 & SRB2 and without SRBs inoculated (sterilized). From Tafel plots a higher corrosion rate has been found in medium inoculated with SRBs than that of the sterilized medium (control). When SRBs were present in the medium, the Tafel plot shifted towards more negative values (E-corr was shifted to much less anodic values) and increase in current density compared to that of the sterilized medium (control). Localized corrosion was observed on the metal surface, and it was associated to the SRB activity. X-ray analysis (EDAX) showed that the corrosion product has higher content of sulphur for medium containing SRBs than that of the sterilized medium. X-ray diffraction analysis carried out on corrosion products which showed the presence of iron sulphide. This indicates the influence of the presence of SRB in corrosion process.

引用

页码：155 / 160

页数：6

共 15 条

[1]

*ASTM, 1999, G389 ASTM

[2] Study of the interaction of sulphate-reducing bacteria exopolymers with iron using X-ray photoelectron spectroscopy and time-of-flight secondary ionisation mass spectrometry [J].