Two new oil and gas pipeline additives were formulated utilizing volatile corrosion inhibitors (VCIS). These products provide a very high level of protection for steel subjected to different types of corrosive
petrochemicals due to surface adsorption and vapor phase action environments. The formulation work was based on fatty acid imidazoline chemistry combined with different organic acids. Different surfactants were used to provide maximum wetting properties to the inhibitor and faster transport of inhibitor from the oil or gas phase to the water. Vapor corrosion inhibitors were introduced in the formulation. A Windows compatible software was used to identify the vital factors that affect the quality of the product. The protective properties of newly developed inhibitors were evaluated in various types of corrosive mediums.
Keywords: vapor corrosion inhibitors (VCIS), oil and gas pipeline additives, imidazoline, fatty acids, “wheel” corrosion test, electrochemical techniques, continuous treatment, film persistency, steel, organic acids, surfactants, petrochemical, SCC (stress corrosion cracking).