RR1023 – Reliable corrosion inhibition in the oil and gas industry

The objective of the work was to undertake a literature review on the subject of corrosion inhibition in the
offshore oil and gas industry to understand the current issues. The application of chemical corrosion inhibitors
can significantly reduce the rate of corrosion of carbon steel pipelines due to the presence of CO2 and/or
H2S. An inhibited corrosion rate of 0.1 mm/year can typically be achieved, which is largely independent of the
uninhibited corrosion rate.

The report covers the main factors affecting the effectiveness of chemical corrosion inhibitors; they are not
effective against corrosion due to the presence of oxygen or microbacterial corrosion. High flow rates, high
temperature, solids (either dissolved or suspended) and pre-existing corrosion can all have a negative effect on
corrosion inhibitor effectiveness.

The role of Key Performance Indicators (KPIs), the main factors affecting the performance of inhibition injection
systems, and the levels of inhibitor availability that can be assumed at the design stage and achieved in practice
are also discussed.

  • Full report

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Article source: http://www.hse.gov.uk/research/rrhtm/rr1023.htm