Application

• Emulsified oil cutting liquid: It is mainly composed of mineral oil, emulsifier, anti-rust agent, oily agent and extreme pressure agent, etc. It has good lubricity and is suitable for cutting under high load and high temperature conditions, but it is difficult to clean and easy to pollute the factory environment.
• Semi-synthetic cutting liquid: It is composed of a small amount of mineral oil, oily agent, extreme pressure agent, rust inhibitor, surfactant, etc. It has the advantages of emulsion and synthetic cutting liquid, and makes up for the shortcomings of both. It is the development trend of metal cutting liquid.
• Fully synthetic cutting liquid: It is mainly composed of water-soluble antirust agent, oily agent, extreme pressure agent, surfactant and defoamer. It has excellent cooling and cleaning performance, is suitable for high-speed cutting, and has a long service life. However, synthetic cutting liquid is easy to wash off lubricating oil, reduce the lubricating effect, and easily cause parts to rust.
• Coolant and antifreeze: The main component of commonly used coolant and antifreeze is ethylene glycol, which has outstanding antifreeze performance, low boiling point, good stability, and low viscosity coefficient, but the chemical properties of ethylene glycol are lively , prone to oxidation reactions.

Metal cutting liquid is generally divided into oil-based metal cutting liquid and water-based metal cutting liquid according to their composition and working methods. Commonly used metal cutting liquid include emulsified oil cutting liquid, semi-synthetic cutting liquid and fully synthetic cutting liquid.

The function and advantage of defoamers

In the production process of metal cutting liquid, the foam can be defoamed fundamentally by adding defoaming agent. In the process of metal cutting agent, the addition of defoamers can eliminate the influence of foam on metal cutting. Metal cutting liquid defoamers haver good diffusivity and permeability, wide application range, chemical stability, and can efficiently solve the foam problem in metal processing.

Causes of foam:

1．The water quality is soft or the liquid has poor oxygen resistance

2．Mechanical high-speed circulation vibration

3．The role of surfactants

4．Metal cutting liquidcontains impurities

Adverse reactions that can be avoided by using defoamer:

1．Avoid affecting the lubrication, cooling, cleaning and anti-rust effects of metal cutting liquid

2．Avoid affecting the normal operation of the machine and the stability of operation

3．Avoid reducing product quality and precision, so that the product oxidation

4．Avoid foam will pollute the working environment of the site