Mitigating Top of the Line Corrosion (TLC) Using Corrosion Inhibitors: Types and Application Methods

This chapter explores the strategic use of corrosion inhibitors for the mitigation of Top of the Line Corrosion (TLC). For effective TLC prevention, a strategic approach involves the creation of volatile corrosion inhibitors capable of accessing the condensed water situated at the top of the line. Predominant inhibitor chemistries primarily incorporate nitrogen-based compounds, such as amines and imidazolines. Recent advancements have included thiol-based compounds, which are promising contenders for TLC inhibitors. The challenge lies in establishing direct physical contact between inhibitors and the top of pipelines in multiphase flow systems. To safeguard the entire pipeline surface, several innovative techniques are under development. These encompass the use of pig trains loaded with inhibitor slugs, optimization of inhibitor chemistry, incorporation of inhibitors into gels and foams, and development of specialty pigs designed to disperse inhibitor chemicals in all directions.