Defoamers for metalworking fluids are important auxiliary agents in the metalworking industry, and selecting appropriate defoamers is crucial for improving the stability and processing efficiency of the fluid. There are various types of defoamers for metalworking fluids, including surfactants, organosilicon defoamers, inorganic defoamers, and composite defoamers.

Surfactant based defoamers are a commonly used type of defoamer for metalworking fluids, which destroy the stability of bubbles by reducing the surface tension of the liquid. Common types include non-ionic, anionic, and cationic. These defoamers have good dispersibility and stability, and can quickly reduce the number of bubbles in metalworking fluids.

Organosilicon defoamers are widely favored for their excellent defoaming performance and chemical stability. Their main component is organosilicon compounds, which can quickly disrupt the stability of bubbles and form a thin film covering the surface of bubbles, preventing their regeneration. This defoamer has a minimal impact on metalworking fluids and will not have any adverse effects on metal materials.

Inorganic defoamers mainly disrupt the stability of bubbles by changing factors such as ion concentration and pH value in metalworking fluids. This defoamer has a good defoaming effect, but due to its complex composition, it is necessary to pay attention to the combination with other ingredients when using it to avoid adverse reactions.

Composite defoamers are composed of multiple defoamers, and through the interaction of different defoamers, they can achieve the best defoaming effect under different conditions. Composite defoamers usually have good stability and durability, and can maintain the defoaming effect of metalworking fluids for a long time.

When selecting defoamers for metal processing fluids, it is necessary to determine based on the specific processing fluid system and process requirements. Different types of defoamers are suitable for different processing fluid systems. Choosing the appropriate defoamer can effectively reduce the number of bubbles, improve the stability and processing effect of the processing fluid, and ensure the quality of metal products. At the same time, it is necessary to consider the environmental and economic aspects of defoamers to meet the requirements of sustainable development.