2015 EJRNL PP SHANGBI PENG 1.pdf)u
Terbatas Suharsiyah
» ITB
Terbatas Suharsiyah
» ITB
Based on the actual operational parameters of a subsea multiphase pipeline, an experimental study
on the internal corrosion of a subsea multiphase pipeline was conducted in a dynamic, hightemperature autoclave, which had a similar environment to an actual field environment, using the
partial pressure of CO2 (PCO2), velocity of the corrosion medium, temperature, corrosion time, and
corrosion inhibitor as variables. The results show that CO2 resulted in severe localized corrosion and
that the corrosion rate increased as the PCO2 and velocity increased; the corrosion rate first
increased and then decreased with increasing temperature. The corrosion rate peaked at approximately 65 C and then decreased continuously afterwards; the corrosion rate decreased as the
duration of the experimental period increased. Under the operational conditions of the selected
subsea pipeline, localized corrosion caused by CO2 was still the primary corrosion risk. Several
types of corrosion inhibitors could inhibit the occurrence of localized corrosion for a short time
period; however, most corrosion inhibitors could not completely inhibit localized corrosion