Liaoning Qizhong Lubricant Technology Group Co., Ltd.
Liaoning Qizhong Lubricant Technology Group Co., Ltd.

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Qizhong Group is a diversified conglomerate primarily focused on the research, development, production, and services of petrochemical products. Its business spans petrochemicals, scientific and technological R&D, corporate training, development and operations, and construction engineering, among other sectors.

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What is a lubricant defoamer? Let’s get to know it together.

Release date:

2022-08-17

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Abstract

Most industrial machinery requires lubricating oil during operation to reduce friction between components, thereby extending equipment life and providing functions such as cushioning, lubrication, rust prevention, and water resistance. However, under the intense agitation and vibration of machinery, lubricating oil can generate substantial foam, and if the foam has excessive viscosity, it becomes difficult to dissipate naturally. This not only damages mechanical equipment but also reduces operational efficiency. Consequently, defoamers for lubricating oils have been specifically developed to address this issue. Let’s take a closer look at them. Lubricating oils often exhibit high viscosity, and when subjected to rapid gear rotation and vigorous agitation, they readily form foam. Additionally, some manufacturers add large quantities of chemical additives to enhance oil performance; these surfactants are particularly prone to foaming. Furthermore, as the oil flows and comes into contact with air during operation, foam may arise. Such foam can clog oil passages, disrupt lubrication, damage machine parts, and lead to even more serious losses. Therefore, timely elimination and control of foam are crucial, making lubricating‑oil defoamers indispensable. The defoaming mechanism of lubricating‑oil defoamers: These defoamers consist of substances with high surface activity. Their strong surface tension enables rapid adsorption onto the oil film, replacing or modifying the existing foam layer to form a new surface film while simultaneously reducing the surface tension of the foaming liquid, thus causing the foam to collapse. They exhibit excellent compatibility with lubricating oils, without compromising product quality or performance. Moreover, they maintain stable defoaming and antifoaming effects across a broad pH range and temperature spectrum, and demonstrate good resistance to high pressure and shear forces. With minimal dosage, they deliver outstanding defoaming results, helping to reduce costs. Due to their low solubility, these defoamers offer superior diffusion and penetration, allowing the active ingredients to disperse throughout the foaming liquid at a rate of approximately 0.8 square meters per second. They are compatible with oils and glycols, effectively eliminating both large and fine bubbles. Applications of lubricating‑oil defoamers: They can be used in metalworking lubricants, anti‑rust oils, various cutting oils, hydraulic fluids, heat‑treatment media, soldering fluxes, forming oils, drawing oils, die‑casting oils, stamping oils, EDM oils, water‑glycol hydraulic fluids, coolants, grinding (oil) fluids, wire‑cutting fluids, dehydrating agents, and other types of oils, including saponified oils. Instructions for use: Before application, thoroughly stir the product. Apply directly by pouring or using a dropper method. If separation occurs, simply remix before use—this will not affect performance. The recommended dosage is 0.1–0.3%, which can be adjusted according to specific conditions. Prior to use, customers should carefully read the product instructions, understand its applicable scope, and conduct small‑scale trials to ensure proper application.

Most industrial machinery requires lubricating oil during operation to reduce friction between components, thereby extending equipment life and providing functions such as cushioning, lubrication, rust prevention, and water resistance. However, under the intense agitation and vibration of the machine, lubricating oil can generate substantial foam, and if the foam’s viscosity is too high, it becomes difficult to dissipate on its own. This not only damages mechanical equipment but also impairs operational efficiency. Consequently… Lubricant defoamer It was specifically developed for this type of foam. Now, let’s get to know it together.

Due to the relatively high viscosity of the lubricant, rapid gear speeds and vigorous agitation can trigger foam formation. Additionally, some manufacturers add substantial amounts of chemical additives to enhance lubricant performance; these surfactants are prone to foaming. During equipment operation, the flowing lubricant’s contact with air also gives rise to foam. Such foam can clog oil passages, disrupt lubrication, damage components, and lead to even more severe losses. Therefore, it is essential to promptly eliminate and control foam, making defoamers for lubricants particularly critical.

Defoaming action of lubricant defoamers:

Lubricant defoamers are composed of substances with high surface activity; their strong surfactancy enables rapid adsorption onto oil films, displacing or modifying the foam film to form a new surface layer and reducing the surface tension of the foaming liquid, thereby causing the foam to collapse. They exhibit excellent compatibility with lubricants, without compromising product quality or performance, and remain stable in a broad pH and temperature range, offering effective defoaming and antifoaming properties while demonstrating superior resistance to high pressure and shear. Used at low dosages, they deliver outstanding defoaming performance, helping to reduce costs. Due to their limited solubility, these defoamers boast excellent diffusivity and penetrability, allowing the active ingredients to disperse throughout the foaming liquid at a rate of 0.8 square meters per second. They are compatible with oils and ethylene glycol and can effectively eliminate both large and fine bubbles.

Applications of lubricant defoamers:

It can be used to defoam metalworking lubricants, anti-rust lubricants, various cutting oils, hydraulic fluids, heat‑treatment media, soldering fluxes, forming oils, drawing oils, die‑casting oils, stamping oils, electrical‑discharge‑machining oils, water‑glycol hydraulic fluids, coolants, grinding (oil) fluids, wire‑cutting fluids, dehydrating agents, and a wide range of other oil‑based products such as saponified oils.

Method of using lubricant defoamer:

Before use, stir thoroughly; apply by pouring or dripping. If separation occurs, stir well before use—this will not affect performance. The recommended dosage is 0.1–0.3%, which may be adjusted according to specific conditions. Prior to application, customers should carefully read the product instructions, familiarize themselves with its intended uses, and conduct small-scale trials to ensure proper usage.

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