Presented ByRosilawati Mohd Rasol

SupervisorDr.Norhazilan Md. Noor

Co-SupervisorAss.Prof. Dr. Nordin Yahaya

OIL AND GAS PIPELINE CORROSION PROTECTION AGAINST CORROSION

DUE TO SULPHATE REDUCING BACTERIA (SRB) USING ULTRASOUND

WAVE

Introduction

SRB is an anaerobic bacteria that reduce sulfate to sulfide hence accelerate the corrosion growth (Wen et al., 2006).

Research Problem

Current existing mitigation

technique not environmentally and it produce lot

of chemical wastage,

expensive, affected by pH, sulphides and

foaming problem

Ultrasound is already

available but not fully used

yet

Therefore, it is wisely to say that Physical

Inhibitor Technique is a

non environmenta

l friendly substances approach.

Research Aim

• Develop SRB mitigation technique based on non-physical inhibitor (Ultrasound wave) to protect pipeline life integrity subject to Microbiologically Influenced Corrosion (MIC).

Main Goal:

Research Objective

The following objectives were identified as steps towards achieving the goal:

To measure the dynamic level of metal loss due to corrosion on X70 steel coupon under influence of SRB.

To determine the relationship between the frequency of ultrasound wave and level of bacteria extermination in the cell bacteria numbers.

To identify the effectiveness of ultrasound mitigation on corroding steel coupon exposed to SRB.

Literature ReviewSRB are often the culprits although many other microorganisms can also directly or indirectly attack the pipeline (li et al., 2000; Kuang et al., 2004; Wen et al. 2006; Badawi et al.,2009)

SRB control is more successfully accomplished using a corrosion physical inhibitor (biocide approach) but still have a wastage and not enviromentally freindly (Sheng et al., 2007; Raad et al.,2009;Gu et al., 2010)

Ultrasound has also been used to kill E. coli ATCC 11775 in food industry (Martin et al., 2001; Mason et al., 2003; Castro et al., 2006).

corrosion of pipeline steel in flowing brine (as a medium) with APB (aerobic bacteria) present can be suppressed by sonication (Pound et al., 2005).

Literature ReviewTherefore, Ultrasound wave is proposed as a non-physical inhibitor (NPI) to compliment the existing chemical injection technique with main intention to better and improve pipeline maintenance scheme by minimising chemicals wastage.

From the book of MIC an Engineering Insight’ by Reza Javaherdashti (2008), he stated about the ability of ultrasound treatment for mitigation of MIC.

However, its is depends on the generation of enough cavitational forces to kill large enough number of MIC-assisting bacteria so that the regrowth is low enough to ensure minimisation of corrosion (Pound et al., 2005).

So, it is possible to conduct this study to prove that the ultrasound wave can mitigate the SRB as a NPI approach.

METHODOLOGY (Stage 1)

METHODOLOGY (Stage 1)

METHODOLOGY (Stage 2)

METHODOLOGY (Stage 2)

METHODOLOGY (Stage 3)

METHODOLOGY (Pilot)

METHODOLOGY (Publication based)

MEDIUM PREPARATION (ATCC 7757)

COUPON PREPARATION (X70)

MEDIUM TRANSFER

BACTERIA CULTURED

BACTERIA COUNTING

4.0 Initial Study

1FESEM

photomicrograph showing corrosion

product on coupon surface

4.0 Initial Study

2FESEM

photomicrograph showing biofilms and bacteria on Coupon surface

after 30 days exposure to the sterile medium

with SRB contained

4.0 Initial Study

3Planktonic SRB

via haemocytometer and microscope

400x magnification

4.0 Initial Study

4SRB kids as a

indicator for SRB presence in

medium

4.0 Initial Study

5Medium sample

comparison before and after ultrasound wave

treatment

4.0 Initial Study

6Performance of low frequency

ultrasound wave upon bacteria

growth

5.0 CONCLUSION

• The preliminary experiment work has demonstrated the capability of low frequency ultrasound wave treatment in inhibiting the growth of SRB.

• The result signify the potential of low frequency ultrasound wave in mitigating the MIC caused by SRB.

• If fully explored, this environmental-friendly treatment approach can be economically incorporated into the existing maintenance tool to hybridise the cleaning and mitigation function to combat the prolonged MIC issues.

5.0 Conclusion

6.0 Research Plan

THANK YOU