Oil corrosion inhibitors are essential chemical agents used to prevent metal degradation in petroleum-related systems, with applications concentrated in three core areas. The oil and gas sector accounts for the largest share of demand, contributing 32.2% of global consumption. In oilfield drilling systems, these inhibitors are added to drilling fluids to protect drill pipes and wellbore casings from corrosion caused by high-pressure, high-temperature environments and acidic formation fluids. They also play a critical role in oilfield gathering and transportation systems, where they shield pipelines and storage tanks from rust and pitting due to prolonged contact with crude oil and water.

Another major application lies in fuel storage and distribution. In refineries, storage terminals, and transportation networks, corrosion inhibitors are mixed into gasoline, diesel, and jet fuel to prevent metal components like storage tank linings and pipeline walls from deteriorating. This not only extends the service life of infrastructure but also avoids fuel contamination caused by rust particles. Additionally, they are used in lubricating oil formulations for automotive and industrial engines, where they protect metal surfaces from wear and corrosion under extreme operating conditions.