Performance behaviour of labsa in a combined steel pickling and degreasing solution
Abstract
Steel degreasing and pickling effect of the acid solutions at various LABSA concentrations and different applied temperatures, combined with ultrasound sonication (35 kHz) has been investigated. From the obtained results, a solution with 10% H2SO4, 3.5 g/l hexamethylenetetramine and 2% LABSA could be used for combined steel degreasing and pickling. The degreasing activity of the solution is considerably increased when sonicating with 35kHz ultrasound, as well as when increasing treatment temperature.
It was clarified that beside traditional degreasing effect of an anionic surfactant, LABSA could be used as an acid pickling component. LABSA is also incorporated into the interlayer space of rust to form an ordered organo-rust substances, which influence on the pickling activity of the solution.