Experimental Study of Factors Affecting Corrosion in Gas Wells Using Potantio Acetate and Galvan Acetate Tests

Abstract

Abstract: Further deterioration in gas wells due to localized corrosion occurs. The local corrosion under the insulation, the deposits or to be caused by bacteria, 10 to 100 times faster than the corrosion damage is uniform. CO2 corrosion in gas wells temperature can be divided into three regions: A) Temperature below 140 degrees Fahrenheit (C60) does not protect the product and the level of corrosion caused by severe corrosion exists. B) Above 300 degrees F (C150), Mgntayt is formed and the environment unless the presence of large amounts of salt water, is slightly corrosive. C) Between 300-140 degrees Fahrenheit (C150-60) has the ability to protect the metal carbonate product layer does not even need a deterrent. But in the presence of ions such as chloride or hydrogen sulfide, or the destructive effect of high velocity fluid layer may be destroyed. Circumstances of high-speed m / s 10 and turbulent fluid flow, creating a protective layer, it is unstable. Scientists Believes that the growth of iron carbonates (FeCO3) crystals incomplete causes a small anodic area and the wounded are yellow corrosion, at temperatures above C100 product of pyrite (FeS2) was created on the metal surface is quite stable in terms of thermodynamic. At lower temperatures the formation of this layer decreases and the corrosion rate increases. Corrosion is usually lower than the concentration in ppm 2000 in the sour wells gas in the range pH 5 to 5 / 6 occurs. In this article discussed about laboratory factors affecting corrosion in gas wells using Potantio acetate and Galvano acetate and Potantio dynamics tests.