L'uso dei tensioattivi gemini nei fluidi per la lavorazione dei metalli

Metalworking Fluids (MWF) are used to facilitate the wetting, cooling and lubrication of metal manipulation. The presence of foam implies that the fluid is not in intimate contact with the metal part and thus not providing the maximum cooling effect. In order to address this issue, the optimization of any formulation would include imparting low foam and defoaming characteristics. This paper presents some new, high performing surfactants, all of which are Gemini surfactants and most of which are based on novel acetylenic glycol chemistry. A model synthetic MWF formulation will be used to demonstrate the impact of these surfactants on static and dynamic wetting, foam control, fines separation, corrosion resistance, and hard water stability. Partial replacement of the benchmark surfactant with these products gives improved performance, particularly in the areas of dynamic wetting and foam control. Acetylenic glycol-based surfactants and other Gemini surfactants can provide significant performance benefits in water-based metalworking fluids and offer an efficient alternative to commonly used surfactants in this industry.