6TH International Congress on Technology - Engineering - Kuala Lumpur3 - Malaysia (2018-07-19)

Corrosion Investigation Of Commercially Available Linepipe Steel In Co2 Environment

CO2 corrosion has been the most prevalent form of corrosion and is considered as a complex problem in oil and gas produc-tion industries. The CO2 in presence of water causes sweet corrosion that is responsible for failure of pipeline during trans-portation of Oil and Gas. This work studies the corrosion behavior of carbon steel specimens in CO2 environment at differ-ent temperatures but at constant pressure. The effect of CO2 on Carbon Steel specimens (X65, A106) were studied in simu-lated solution of 3 wt.% NaCl. The specimens were immersed into the CO2 containing solution for 48 hours and corrosion behavior was investigated by using electrochemical test like Linear Polarization Resistance and Tafel plot. The results indi-cate that the temperature has an important effect of corrosion rate of Carbon Steel in CO2 environment. Corrosion rate of 1.5~2 mm/yr was reported for both steels at lower temperature while at higher temperature the difference can be observed due to difference in protective nature of steels. Similar Corrosion rate around 1.5 ~2 mm/yr. was observed at 25°C for both A106 and X65 while at 50°C & 75°C the corrosion rate varies significantly 1.5~3 mm/yr and 3.5~6 mm/yr.
Muhammad Haris, Saeid Kakooei, Mokhtar Che Ismail