The aim of this research was to study the effectiveness of typical oilfield corrosion inhibitors
in controlling internal corrosion of welded X65 pipeline steel in brines saturated with carbon
dioxide at one bar pressure, under dynamic flowing conditions, at a range of temperatures.
A rotating cylinder electrode (RCE) apparatus was designed to allow steel from the weld
metal, heat affected zone (HAZ) and parent material to be galvanically coupled and tested
in high shear stress conditions. In producing the RCE, the three regions of the weld were
identified by optical metallography and samples of each were machined to produce
cylindrical electrodes, which were mounted on a motor driven shaft. Electrical connections
were made to the three electrodes via a high quality slip-ring assembly.