Defoamers for Metalworking Fluids

Foam formation in a metalworking fluid depends on the surfactant system, water quality, circulation intensity, contamination and equipment operating conditions. A defoamer must therefore be selected as part of the complete formulation: it should control foam while remaining compatible with the emulsifier system.

Antifoam additives are used in metalworking fluid concentrates and working dilutions. Selection should consider the fluid type, preparation method, product solubility, temperature and mechanical stress within the system. Foam control and durability should be evaluated in laboratory testing and, where necessary, under production conditions.

Silicon-Containing and Silicon-Free Defoamers

The catalogue includes wax-based silicon-free products, defoamers based on polyglycol derivatives, and grades containing silicon-based copolymers. The range contains solutions for concentrates, process emulsions and process solutions.

Selecting a Defoamer for a Metalworking Fluid Formulation

For an initial selection, provide information on the system type, base components and surfactants, water hardness, working concentration and circulation conditions. REVADA can help compare available grades, obtain technical documentation and select samples for testing. Treat rate and order of addition should follow the TDS for the selected product.