Barium diphenylaminesulfonate is primarily used as a corrosion inhibitor in industrial applications. It is particularly effective in protecting metal surfaces, especially in cooling water systems and boilers, where it helps prevent scale formation and metal degradation. The compound forms a protective layer on metal surfaces, reducing the impact of corrosive substances and extending the lifespan of equipment. Additionally, it is employed in the formulation of lubricants and greases to enhance their anti-wear and anti-corrosion properties. Its stability under high temperatures and pressures makes it suitable for use in demanding industrial environments.