poster - co2 corrosion rev1

Where does it occur? Locations and items where CO2 corrosion is likely to be seen: - Internal only - All hydrocarbon systems containing CO2 and water - Hot spots include bends, tees, reducers, pipework straights at the 6 o’clock - Affects carbon steels Policy To minimising risk to personnel, environment and business from the threat of CO2 corrosion. Strategy - Mitigations - Planned maintenance/ inspection routines - Immediate action on non-conformance - Involvement from key personnel - RBI – Risk Based Inspection - CRA – Corrosion Risk Assessment What can be done to prevent it? - Effective planning of mitigations, maintenance and monitoring - Replace with corrosion resistant alloy - Reduce water cut in oil systems - Use of dryers in gas systems - Apply linings and coatings - Report any degradation - Management strategies When & Why does it occur? Presence of CO2 and water, high Pressure, worst case temperature 30-80 deg C, low pH, inadequate corrosion inhibition, lining/coating failures Facts - CO2 Corrosion a.k.a. Sweet Corrosion - CO2 occurs naturally in reservoir fluids and causes corrosion by dissolving in free water to form carbonic acid. - CO2 corrosion is dependant on CO2 partial pressure, temperature, pH, flow regime and the surface of the steel.

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CORROSION

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Where does it occur?Locations and items where CO2 corrosion is likely to be seen:- Internal only - All hydrocarbon systems containing CO2 and water- Hot spots include bends, tees, reducers, pipework straights at the 6 oclock- Affects carbon steels

PolicyTo minimising risk to personnel, environment and business from the threat of CO2 corrosion.

Strategy- Mitigations- Planned maintenance/ inspection routines- Immediate action on non-conformance- Involvement from key personnel- RBI Risk Based Inspection- CRA Corrosion Risk Assessment

What can be

done to prevent

it?- Effective planning of mitigations, maintenance and monitoring- Replace with corrosion resistant alloy- Reduce water cut in oil systems- Use of dryers in gas systems- Apply linings and coatings- Report any degradation- Management strategies

When & Why does it

occur?Presence of CO2 and water, high Pressure, worst case temperature 30-80 deg C, low pH, inadequate corrosion inhibition, lining/coating failures

Facts- CO2 Corrosion a.k.a. Sweet Corrosion - CO2 occurs naturally in reservoir fluids and causes corrosion by dissolving in free water to form carbonic acid. - CO2 corrosion is dependant on CO2 partial pressure, temperature, pH, flow regime and the surface of the steel.