This paper presents theoretical background and development of a probe for corrosion monitoring of process- and piping systems made of stainless steels. The probe will be installed in two piping systems on the Draugen platform in the North Sea. One installation is for monitoring of a produced water systems made of duplex stainless steel (UNS S31803), and one for monitoring in a seawater system made of high-alloy austenitic stainless steel of the 6 Mo type (UNS S31254). Equipment for logging and storing data is also described.

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