Vandi Zira Njelle, Obidimma D. Ikeh, Ikpe Aniekan E, Artford Usuoyibo, “Study of Corrosion Rate of Low and Medium Carbon Steel Pressure Vessel in Nigeria Oil and Gas Industry Using Ultrasonic Testing (UT) and Phase Array Ultrasonic Testing (PAUT) Method”, JSTR, vol. 1, no. 3, Aug. 2019.