1 As Acid Mist Inhibitors
During pickling, hydrochloric acid, sulfuric acid, or nitric acid inevitably react with the metal substrate while reacting with rust and scale, generating heat and producing large amounts of acid mist. Adding surfactants to the pickling solution, due to the action of their hydrophobic groups, forms an oriented, insoluble linear film coating on the surface of the pickling solution. Utilizing the foaming action of surfactants, acid mist volatilization can be suppressed. Of course, corrosion inhibitors are often added to pickling solutions, which significantly reduce the metal corrosion rate and decrease hydrogen evolution, thereby correspondingly reducing acid mist.
2 As a Combined Pickling and Degreasing Cleaning
In general industrial equipment chemical cleaning, if the fouling contains oil components, alkaline cleaning is first performed to ensure pickling quality, followed by acid cleaning. If a certain amount of degreasing agent, primarily nonionic surfactants, is added to the pickling solution, the two steps can be combined into one process. Additionally, most solid cleaning solutions primarily consist of sulfamic acid and contain a certain amount of surfactants, thiourea, and inorganic salts, which are diluted with water before use. This type of cleaning agent not only has excellent rust and scale removal and corrosion inhibition properties but also simultaneously removes oil.
Post time: Aug-29-2025