ULASAN METODE PENGUJIAN LAJU KOROSI PADA MATERIAL BAJA KARBON

Abstract

Valve is a vital component in the oil and gas industry to regulate the flow of oil and gas fluids. Selection of materials for body valve very important because part closure valve susceptible to corrosion, especially during hydrotest testing. Cases of corrosion on parts closure valve type trunnion happened at PT. XYZ after testing hydrotest and storage in warehouse. Corrosion, caused by chemical reactions between metal and the environment, can cause significant financial losses. Factors such as the chemical composition of the material, temperature, pressure, and inhibitors also influence the corrosion rate. This study aims to compare corrosion rate testing methods based on the literature. The methodology used includes the lost weight testing method (weight loss method) which measures the rate of corrosion by observing changes in material weight, the electrochemical testing method which studies the rate and mechanism of corrosion through electrochemical reactions, and the microscope method which analyzes the surface structure of the material microscopically. Previous research results on corrosion on materials such as AISI 1065 carbon steel, ASTM A105 pipes, low carbon steel, metal welded joints, and JIS G-3141 steel, show that there are variations in corrosion rates and the factors that influence them, such as the use of inhibitors and environmental conditions. . Method comparison shows that Electrochemical testing methods provide rapid, sensitive, and comprehensive results, making them effective methods for industrial applications and advanced research. In conclusion, environmental factors, material composition, and test methods greatly influence the corrosion rate. The use of inhibitors and other protective techniques is effective in reducing the rate of corrosion and extending the life of the material. This research suggests the use of electrochemical methods as the best method to determine the rate of corrosion valve closure at PT. XYZ, especially on valves made from ASTM A105N material.