Abstract
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 (Ecorr 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.
| Original language | English |
|---|---|
| Pages (from-to) | 155-160 |
| Number of pages | 6 |
| Journal | Sains Malaysiana |
| Volume | 37 |
| Issue number | 2 |
| Publication status | Published - Jun 2008 |
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Keywords
- Electrochemical test
- Stainless steel
- Sulphate-reducing bacteria
- Tafel plots
ASJC Scopus subject areas
- General
Cite this
Electrochemical study of stainless steel corrosion by marine sulphate-reducing bacteria. / Sahrani, Fathul Karim; Ibrahim, Zaharah; Aziz, Madzlan Abd; Yahya, Adibah.
In: Sains Malaysiana, Vol. 37, No. 2, 06.2008, p. 155-160.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical study of stainless steel corrosion by marine sulphate-reducing bacteria
AU - Sahrani, Fathul Karim
AU - Ibrahim, Zaharah
AU - Aziz, Madzlan Abd
AU - Yahya, Adibah
PY - 2008/6
Y1 - 2008/6
N2 - 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 (Ecorr 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.
AB - 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 (Ecorr 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.
KW - Electrochemical test
KW - Stainless steel
KW - Sulphate-reducing bacteria
KW - Tafel plots
UR - http://www.scopus.com/inward/record.url?scp=51049123632&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=51049123632&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:51049123632
VL - 37
SP - 155
EP - 160
JO - Sains Malaysiana
JF - Sains Malaysiana
SN - 0126-6039
IS - 2
ER -