Evaluating the stability of defoamers is a multidimensional process aimed at ensuring that they can maintain their performance and quality under different conditions. Here are some key evaluation methods and indicators:

Place the defoamer sample under different temperature conditions (such as high temperature, low temperature, or temperature cycling), and observe whether its appearance and performance have changed. Whether the color, transparency, viscosity, pH value, defoaming performance, etc. remain stable. Adjust the pH value of the solution and

observe the performance of the defoamer under different pH conditions. Whether the defoaming performance is affected by pH value, and whether precipitation, stratification, and other phenomena occur. Test the stability of defoamers in systems containing water of different hardness. Whether the defoaming performance is affected by water

hardness and whether good dispersibility and compatibility are maintained.

Regularly check the viscosity of defoamers and observe whether there are significant changes. Viscosity stability is one of the important indicators for evaluating the quality of defoamers. Detect the content and stability of various components in defoamers, such as antioxidant and hydrolysis resistance, through chemical analysis methods.

Whether the content of components remains stable and whether chemical reactions occur leading to a decrease in performance.

Place the defoamer sample in a sealed container, store it at room temperature or under specific conditions for a long time, and regularly observe its appearance changes. Whether phenomena such as color, transparency, layering, and sedimentation occur. Regularly test the defoaming performance, anti foaming performance, and other key

indicators of the defoamer during storage. Whether the performance remains stable without significant decline.

Apply defoamers to actual production processes and observe their performance under different process conditions. Whether it meets the process requirements, such as defoaming speed, defoaming time, compatibility, etc. Test the compatibility of defoamers in different equipment and pipeline systems. Whether it causes corrosion, blockage

or affects the operation of the equipment.

Evaluating the stability of defoamers requires comprehensive consideration of multiple factors and methods. Through rigorous scientific testing and practical application verification, it can be ensured that defoamers maintain stable performance and quality under different conditions.