Used as a corrosion inhibitor in industrial water treatment systems, particularly in cooling water and boiler systems. It forms a protective film on metal surfaces, preventing oxidation and degradation caused by water and dissolved oxygen. Also utilized in oilfield applications to protect pipelines and equipment from acidic corrosion, especially in environments with high levels of carbon dioxide. Its effectiveness in low concentrations makes it suitable for closed-loop systems and metalworking fluids. Additionally, it serves as an additive in some lubricants and hydraulic fluids to enhance metal protection.