Pengaruh Temperatur dan Konsentrasi Inhibitor terhadap Laju Korosi pada Material Drillpipe API 5D Grade G-105

Abstract

Corrosion is a problem that often arises and cannot be avoided in the industrial world. As happened to the oil and gas drilling company operating in the Jegulo area, Tuban, corrosion had occurred in the 5-inch API 5D Grade G-105 drill pipe which resulted in a series of drilling breaks in the well. The addition of inhibitors is considered capable of inhibiting the rate of corrosion that occurs. From the description above, research will be carried out on controlling corrosion by the method of adding inhibitors to the drilling mud on. Inhibitors used are Potassium Chromate, Ethyl Diamin Tetra Acid and Sodium Nitrite with variations of 0 ppm, 500 ppm, 1000 ppm and 1500 ppm. This test was carried out with the Potentiostat method at temperatures of 40 ° C, 55 ° C and 70 ° C. The test results showed the lowest corrosion rate using a potassium chromate inhibitor occurred at a concentration of 1000 ppm 40 ° C that is 0.0107 mm / y. In EDTA inhibitors occur at a concentration of 1500 ppm 40 ° C which is 0.0045 mm / y. Where as the sodium nitrite inhibitor occurs at a concentration of 1500 ppm 50 ° C which is 0.0018 mm / y. So, the best inhibitor inhibits corrosion rate is Sodium Nitrite because it has the lowest average corrosion rate.