Ways to improve biocides for metalworking fluid

Abstract

Metalworking fluids (MWF) are mainly emulsions of oil in water containing additives such as corrosion inhibitors, emulsifiers, defoamers, and biocides. Microbial contamination of MWF is almost systematic, and some of their constituents serve as nutrients for contaminating microorganisms. Biocides for MWF are protection products used to counter microbial contaminations and growth. Ideally, a biocide for MWF should have the following non-exhaustive criteria: have a broad-spectrum activity, be usable at low concentrations, be compatible with the formulation and the physical-chemical properties of MWF, be stable over time, retain its effectiveness in the presence of soiling, have no corrosive action on metals, present no danger to humans and the environment, be inexpensive. The future lies in the development of new molecules with biocidal activity corresponding to these ideal specifications, but in the meantime, it is possible to improve the performance of existing molecules currently on the market. Different strategies for potentiation of the activity of existing biocides are possible. The compatibility of the potentiation strategies with their use in metal working fluids is discussed.

Efficient Metal Cutting Fluid Wastewater Separation of Polyacrylonitrile Ultrafiltration Membranes Enabled by Metal Ion Cross-Linking

“…Metal cutting fluids are widely used as lubricants and cooling agents during metal processing, 1 and the generated wastewaters have complex components, such as oils, surfactants, synthetic lubricants, rust inhibitors, antioxidants, defoamers, and metal ions; moreover, they are highly emulsified. 2 The discharge of metal cutting fluid wastewaters would pose a threat to the aquatic environment and human beings.…”

Sustainable utilization of the vegetable oil manufacturing waste product in the formulation of eco-friendly emulsifiable cutting fluids

“…Biocide is applied in cutting fluid emulsion formulations to inhibit the growth of microorganisms, which can lead to a variety of issues, including corrosion, odor, health risks, and decreased performance. Biocides are added in low concentrations to ensure their effectiveness and to minimize any potential negative effects on the cutting fluid itself 63 , 66 . Additionally, oiliness plays a role in providing better lubrication and improving the workpiece surface finish 21 , 67 .…”

Enfermedades del intersticio pulmonar de causa laboral. Parte II

“…Con más de 1,2 millones de trabajadores en los Estados Unidos implicados en la manufactura de máquinas, máquinas herramienta y automotores, es común la exposición a MWF. 38,39 Los métodos de vigilancia epidemiológica son útiles para revelar causalidad, al demostrar que el MWF es el factor más frecuente de AsmOcup, junto con los isocianatos. En la publicación de Bakerly, componían el 11% y estos últimos, el 21%; en tanto que, en la de Rosenman y cols., los MWF constituían el 11% y los isocianatos, el 14%.…”