This paper deals with the field use of a multi-technique electrochemical corrosion monitoring system, to differentiate between general and localized corrosion activity in a water injection system. The technology was used to identify the corrosion mechanism that resulted in failures in the system, showing benefit over and above 'conventional' corrosion monitoring techniques (e.g. Linear Polarisation Resistance, LPR, and coupons) that had failed to identify the corrosion risk.

Subsequent to identifying the type of corrosion in the system, the multi-technique approach aided the identification of a suitable corrosion inhibitor to mitigate the corrosion. The findings from the study have been confirmed by weight loss coupon data and 'conventional' monitoring techniques after implementation of a treatment program using the optimized corrosion inhibitor formulation.

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