Water Quality Affects Coolant Performance

Water Quality Affects Coolant Performance

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 and may result in separate oil from water.

Hard water contains sodium and potassium salts, which can cause machine and work-piece corrosion. It can also cause significant discoloration on the surface of steel and aluminum parts. Besides, hard water is difficult 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.

【TOTAL HARDNESS (ppm) EVALUATION】
■ Very soft:0 - 49
■ Soft:50 - 124
■ Medium:125-249
■ Hard:250-369
■ Very hard:370 and above

▼ 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.

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    HLJH TAIWAN

    Hai Lu Jya He who is a coolant general agent of MORESCO in Taiwan. There are OEM and ODM service for customized cutting fluid. HLJH AIE-73 semi-synthetic coolant does not have chlorine composition which has the excellent lubricating, antisepesis, washing performances to remove chips immediately and reduce the stickiness from surface, tools and workpieces. It is simple and easy to cleaning machine and sump. Especially, the performance of anti-corrosion can control and prevent the color change while metalworking. HLJH AIE-73 coolant is often used for lathe, boring, milling, drilling, tapping, threading, reaming and sawing. For the materials, it is suitable for aluminum, cast iron, steel alloy and brass. In particular, HLJH AIE-73 cutting fluid have excellent stability in hard water which can prevent separate water and oil then can be used stably for a period of time. It is used in many industries such as hardware parts, bike and automotive parts.On the other hand, all of our coolant have prodcut certifications like RoHs, TDS, SDS. And all manufacture processing complies with ISO 9001:2015 QMS(Quality Management System). Our MORESCO AIE-73 coolant is backed with 100% satisfaction. Contact with Hai Lu Jya He for more professional advices.


  • AIE-75 Semi-Synthetic Coolant - HLJH AIE-75 cutting fluid has the excellent lubricating, cooling, washing abilities and good rust protection.
    AIE-75 Semi-Synthetic Coolant
    HLJH TAIWAN

    Hai Lu Jya He who is a coolant manufacture in Taiwan. There are OEM and ODM service for customized cutting fluid. HLJH AIE-75 semi-synthetic coolant does not have chllorine which has the excellent lubricating, antispesis, washing performances to remove chips immediately and reduce the stickiness from surface, tools and workpieces. HLJH AIE-75 coolant is often used for lathe, boring, milling, drilling, tapping, threading, reaming and sawing. For the materials, it is suitable for aluminum, cast iron, steel alloys. In particular, HLJH AIE-75 cutting fluid have excellent stability in hard water which can prevent separate water and oil then can be used stably for a period of time. It is used in many industries such as hardware parts, bike and automotive parts.On the other hand, all of our coolant have prodcut certifications like RoHs, TDS, SDS. And all manufacture processing complies with ISO 9001:2015 QMS(Quality Management System). Our MORESCO AIE-75 coolant is backed with 100% satisfaction. Contact with Hai Lu Jya He for more professional advices.



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