Barium petroleum sulfonate

Barium petroleum sulfonate (CAS 61790-48-5), also sold as barium petroleum sulfonates or referred to in technical literature as sulfonic acids, petroleum, barium salts, is an oil-soluble metallic sulfonate.

It is used primarily as a corrosion inhibitor and detergent additive in lubricant and metalworking formulations. Its barium salt structure provides strong film-forming and emulsification performance in hydrocarbon-based systems.

In lubricant additive packages, it functions as a detergent-dispersant, neutralizing acidic combustion byproducts and keeping engine and industrial oil systems clean. This ensures long-term equipment reliability.

Metalworking fluid formulators use it to protect ferrous metal surfaces during cutting, drawing, and forming operations. Corrosion protection between processing stages is critical for maintaining high-quality manufacturing standards.

It is incorporated into rust-preventive oils and protective coatings applied to steel components during storage and transit. This prevents oxidation and surface degradation in harsh environmental conditions.

In oilfield applications, it supports water-in-oil emulsion stability in drilling and completion fluids where hydrocarbon compatibility is required. This versatility makes it a staple in heavy industrial chemistry.

Barium petroleum sulfonate is supplied as a viscous liquid or semi-solid, typically dissolved in a mineral oil carrier. The Technical grade is the standard commercial form for most industrial buyers.

Product specifications are defined by total base number, barium content, and sulfonate equivalent weight. Buyers should confirm active sulfonate concentration and carrier oil type when comparing grades across suppliers.