Coolant Knowledge

Coolant Knowledge

There are many types for instrial oil, such as cutting fluid(coolant), lubricant(hydraulic oil, slideway oil), anti-rust oil and so on. The mainly functions are lubricating and reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, remove other particles, and cooling the surfaces. The property of reducing friction is known as lubricity. In addition to industrial applications, lubricants are used for many other purposes.

Besides of base oil, the addicative becomes another important role which could improve and increase cutting ability.
Here are the articles for your reference by HAI LU JYA HE Co.,Ltd that include oil types, normal problems, oil ratio and property etc.

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"How to choose metalworking cutting fluid?" "Which type of cooling lubricant should I use for my machining process?" Machining metals can cause a significant amount of stress and strain on both the material being formed and the tool tasked with the machining. To extend the life of the tool and achieve a better finished product, cutting fluids are commonly used. In most cases, there have been recent performance issues with the existing oil or something has changed in the manufacturing process, new machines, changing environmental that precludes its use. Sustainability goals and other factors can all combine to limit the effectiveness or applicability of the current oil. In order to select the best oil, you need to gather some basic information relevant to the selection criteria. For purposes of simplicity, you need to know the metals in use, the predominant machining operations, basic machine types, tooling specifics, plant processes and chemical restrictions for your facility. Similar to most lubricants, metalworking fluids may be formulated with a variety of base oils and additives. These must be married to the operation and the material being machined for optimum results. Unlike traditional lubricants, metalworking fluids tend to have more oil-and-water solutions that combine the lubricating properties of the oil with the cooling capacity of water. Other base oil options include straight oils, semi-synthetics, emulusion and full synthetic lubricants. Each of these types is unique and can be blended with an assortment of additives to enhance, suppress or add properties to the base oil. These fluids are important to the tool's overall life cycle as well as how the machining process performs its intended function.Seek the assistance of an experienced, qualified metalworking fluids specialist to identify options and guide you through the selection process. Read More
Mineral deposits in your fluid delivery lines? Decreased grinding fluid performance? Excessive corrosion? Maybe it’s time your water quality was evaluated. Coolants contain ~90% water, with the remainder containing additives to prevent from corrosion, foaming, and bacterial growth. However, while the quality of these additives is precisely controlled by the coolant manufacturers, the water quality varies depending on its source. Therefore, your water quality should be monitored before diluting the concentrated coolant. Factors that affect water quality are water hardness, pH, and the presence of chlorides, sulfates, and lead. Monitoring the pH level can identify bacterial growth. Generally speaking, hard water is the amount of calcium and magnesium salts, expressed in milligrams of calcium carbonate per liter of water (ppm). A pH of 7 is defined as natural. Water below pH 7 is acidic, above pH 7 is basic. Most commercially available coolants are basic in their concentrated form with pH levels between 9 and 12. For example, the ideal hardness levels for glass working coolant are between 80 to 110 ppm. Water with hardness value below 70 ppm is considered soft and may result in foaming whereas hardness value that exceeds 200 ppm is consider hard. 【TOTAL HARDNESS (ppm) EVALUATION】 ◆ Very soft:0 - 49 ◆ Soft:50 - 124 ◆ Medium:125-249 ◆ Hard:250-369 ◆ Very hard:370 and above Hard water contains sodium and potassium salts, which can cause machine and workpiece corrosion. It can also cause significant discoloration on the surface of steel and aluminum parts. On the other hand, hard water is diffcult mixed with coolant, so it easily separate oil and water, and part of the concentrated liquid is consumed to soften the water, and cannot function as a cutting fluid. In order to ensure the performance of cutting fluids, adding more concentrated fluids increased the cost. ▼ Recommended standards for water hardness of cutting fluid Recommended water hardness is between 50ppm. And it resulting in poor cleaning performance. It is recommended to consult relevant professionals for on-site inspection and analysis. Read More
Brass is an alloy that’s usually made up of 67% copper and 33% zinc. Bronze is composed of 88% copper and 12% tin. Both of these metals have a really high copper content. Basically, most of coolant contains triethanolamine phosphate to stable pH level and performance. However, these formula has reacted with oxygen, water, and carbon dioxide in the sump, when machining copper and brass. That is why the coolant form that same patina in the sump when they oxidize. However, most of metalworking manufactuer have these problems while they machining copper and brass materials. When you see that green layer on these metals (usually called patina or verdigris) it’s because of a chemical reaction. The problems like coolant trun green color, brass oxidize, pH level goes up or down etc. Put simply, this situation is a normal when we machining copper materials. The most importantly, use the dedicate coolant for brass which coolant color won't change right away or in a short time. Here are some points for your reference as below. 【Three Tips】 Coolant Choice:Use a dedicate coolant for brass to get good performance Check pH Level:If too low, you can add new coolant to balance concentration. At the same time, it can keep performance and extend the coolant life Filter the Coolant Regularly : The cooper chips are too light to sedimentation. Then these chips will cause surface and workpieces scratche. Read More
Rust and corrosion are factors of major economic importance costing industry and consumer’s abnormal expenses. This unwanted expenditure can be curtailed/eliminated markedly through the use of petroleum based temporary rust and corrosion preventives. Hai Lu Jya He Co., Ltd provide rust preventive oils & solutions to protect metals from rust and corrosion. These solutions include water-based and oil-based formulas for short-term, medium term and long-term protection. Anti-rust oil include corrosion inhibitors for in-process protection as well as for the protection of parts in storage and shipping. Our rust preventive oils, that contain those corrosion inhibitors, form a barrier film on the substrate surface. The inhibitor molecules adsorb on the surface, forming a film protecting the part from the attack of oxygen, water, and other chemically active substances. Rust forms on iron when it meets water or oxygen. It results in equipment failure, increased power consumption, non-salable parts, and other problems. Protection against corrosion of metallic parts is essential. Anti preventive oil has been developed to provide effective protection of parts and components. It is used for protection between operations or for a final anti-corrosion protection before dispatch or storage. Our rust preventive products can be used on all types of metal, ferrous, copper metals, galvanised steels and aluminium etc. Anti-rust oil can be applied by spraying - micro-spraying, sprinkling, or immersion, leaving a protective anti-corrosion film that is waxy, oily, greasy and with high de-watering power. We provide solutions to reduce your overall costs: ■ Improve productivity, improve the Overall Equipment Efficiency ■ Increase the lifetime of tools ■ Health, Safety and Environmental criteria According applications and the mode of transportations, there are three types of anti-rust oil we used, like short term, medium term and long term rust preventive oils. However, store the products must be consider that to avoid direct sunlight and under normal temperature. We provide three types anti preventive oil as below. ■ Short-term protection against metal corrosion:0 to 3 months. ■ Medium-term protection against metal corrosion: 3 to 6 months. ■ Long-term protection against metal corrosion: 12months, or longer. Read More

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