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Regarding the cast iron and steel parts produced not rusting, while the machine tool guideways are showing signs of rust.

Some load processing requires the addition of extreme pressure agents (mainly compounds containing active elements such as S, P, Cl). The use of these additives in combination with lubricants can greatly improve the ease of cutting and enhance the wear resistance of tools. The downside is that these substances can easily cause corrosion to various metals when added to water-soluble cutting fluids. When these compounds dissolve in water, they produce a small amount of free Cl, S, and P, which combine with hydrogen ions in the water to form acids that can corrode guide rails.

How to deal with the issue of cutting fluid injuring hands.

The characteristics of cutting fluid causing hand injuries include: skin peeling, red rashes, blisters, inflammation, itching, and ulceration in areas with wounds. To address these issues, it is important to understand the various components of cutting fluids. 1. For skin peeling, it is closely related to the pH value of the cutting fluid. A pH that is too high can lead to this condition. Generally, for cutting fluids used in processing cast iron and steel, the working fluid's pH should be maintained between 8.5 and 9.5. For aluminum cutting fluids, the pH should be kept between 8.5 and 9.0. Reducing the amount of triethanolamine can help. 2. Other skin symptoms are related to the biocides in the cutting fluid. If the amount of biocide used is too high, it can irritate the skin and cause inflammation. Triazine-based biocides, such as (BK), work by bacteria breaking down the biocide, which produces formaldehyde. Formaldehyde has preservative and sterilizing effects but can also irritate the skin and cause inflammation. Therefore, the use of such biocides should not be excessive. Additionally, excessive use of sodium nitrite can also irritate the skin, leading to itching and ulceration. Other factors, such as the operator's constitution and skin allergies, should not be ruled out.

What is the situation of workpieces rusting in summer when using fully synthetic cutting fluids?

Fully synthetic cutting fluids do not contain oil, so many manufacturers choose inorganic salts as their rust prevention additives, such as sodium nitrite, boric acid, sodium benzoate, sodium gluconate, sodium carbonate, etc. Sodium molybdate has excellent rust prevention properties, but it is too expensive.

What should I do if the lubrication or rust prevention performance of the product does not meet the requirements after using metalworking fluid?

The main considerations are as follows: 1. The production process does not comply with specifications, and various parameters during the processing have not been properly set, which does not meet the requirements for the application of metalworking fluids. The working environment when using metalworking fluids does not meet the application conditions.

What are the causes of foaming in metalworking fluids, and how can it be resolved?

Metalworking fluids are liquids used in metal processing, primarily serving lubrication and cooling functions, while also providing rust prevention and cleaning effects. Common types of metalworking fluids include cutting fluids, cutting oils, emulsions, grinding fluids, rust inhibitors, cleaning agents, and thickeners, among others.

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