Kuwait Oil Company (KOC) internal corrosion monitoring management involves different measurement techniques including the use of fluid chemistry analyses and internal corrosion monitoring devices such as weight loss coupons, electrical resistance probes (ER) and linear polarization probes (LPR) for direct internal corrosion rate measurements. It also includes the use of bio-probes and intrusive hydrogen probes in selected locations. All collected data from these techniques are used to obtain the internal corrosion rates and trends.
ER and LPR probes from different manufacturers are being utilized to optimize the chemical injection program applied across various facilities in order to control the internal corrosion. Probes from different manufacturers have different probe factors/constants, which are a function of element thickness and geometry for ER probes, and probe multipliers for LPR probes. These factors and multipliers compensate the difference between electrode materials, electrode sizes or operating conditions, and hence, it is necessary to harmonize the data from these probes to enable to attain comparable and reliable performance.
The purpose of this paper is to describe a functional test program designed with laboratory conditions suitable for the corrosive situations experienced in the field and screening the performance of various ER and LPR probe types for further application in the field.
Key words: Internal corrosion monitoring, Corrosion Probe, Probe Factor, Functional test