R&D — the path to progress

We conduct research every day, ensuring our innovations define the future and not the past. Our constant stream of technological advances are the result of a talented team of both young and experienced staff working with state-of-the-art laboratory equipment.

R&D is teamwork


That’s why HAERTOL invests in its own applications-based research and development capabilities and cooperates with internationally renowned institutes and clients on a number of different levels. It’s the only way to continually improve our technologies, processes, and products.

Our experienced laboratory team develops for our customers solutions and products that are constantly becoming more efficient and more ecological. Each and every new product is accompanied by extensive laboratory and fleet testing.

Quality assurance


Trust, but verify — our quality assurance team take samples of our raw materials and finished products on a regular basis. These samples are analysed using state-of-the-art testing equipment and in accordance with international standards. The results are then documented before a batch is approved for filling.

HAERTOL inside: our laboratory testing procedures

Below you will find additional information, images, and videos on the extensive testing we put our products through.

Corrosion testing and property analysis

  1. ASTM D1384 corrosion testing
    In the ASTM D1384 corrosion test, our heat transfer media (in addition to prototype and competitor products) are subjected to extreme conditions for 336 hours at 88°C. This procedure lets us examine corrosion inhibition and oxidation stability properties. Metal coupons — modified to meet the respective requirements — are used as test samples. These metal samples normally consist of copper, brass, various aluminium alloys, iron, steels, and hard and soft solders of various compositions.

    Conclusions can be drawn about the quality of the heat transfer medium by examining visual changes of the test samples, the weight differential after testing, and changes in the pH value of the test medium. HAERTOL quality is plain to see.

  2. ASTM D4340 corrosion testing
    In this 168-hour static corrosion test, we examine the extent to which a coolant is able to protect the test sample from corrosion while enabling a specified amount of heat transfer from the metal coupon to the coolant.

    The metal test sample is heated to and maintained at a constant 135°C while the resulting equilibrium temperature of the coolant it is immersed in is measured. If this equilibrium temperature falls from the normal 105°C for instance to 90°C, it may indicate that a thick insulating coating has formed on the test sample. This test also involves a subsequent visual examination of the test sample and gravimetric corrosion analysis.

  3. FVV corrosion testing
    This test is conducted to determine the suitability of coolants for use in internal combustion engines. The dynamic FVV test is used to ascertain the ability of inhibitors to protect the cooling system from corrosion at heightened temperatures and variable levels of heating. In addition to the optical assessment of the metal surface, the samples are also subjected to a subsequent gravimetric analysis.

  4. Thermal stability in high-pressure autoclaves
    Thermal stability is an important criterion for the quality of heat transfer media. To achieve temperatures of 220°C and higher over the course of several weeks in aqueous solutions, very high pressures are required. These pressures can only be reliably achieved in special steel containers known as autoclaves.

  5. Foaming testing
    Heat transfer media are often pumped at high flow rates in order to transport heat as effectively as possible through a system or simply to maximize cooling. It is important that coolants do not foam, since foaming would limit heat transfer and impair their effectiveness. Consequently, nearly all heat transfer products are formulated with anti-foaming agents. A foaming test is used to determine the effectiveness of these formulations.

  6. Low-temperature properties
    Heat transfer media must remain liquid at low temperatures if they are to fulfill their purpose. Automotive coolants must withstand temperatures as low as –40°C. Freeze points are measured in the laboratory by determining the temperature at which a liquid begins to form ice crystals and freeze.

Measurement of physical and chemical parameters

  1. Density, refractive index, and viscosity
    Density and refractive index are easily determined physical parameters of liquids which provide precise indications of the purity and identity of the respective liquids. For mixtures with known ingredients, these measurements allow us to determine the ratio of the components used. They also allow us to ascertain the degree of protection against freezing that glycol-water mixtures provide.

  2. Automated titrations
    Using a Titrino (an automatic titration device), we are able to precisely measure a number of characteristics of raw materials and finished products. This ensures flawless raw materials are consistently used to produce our high-quality products. The measurements conducted include pH value in accordance with ASTM D1287; reserve alkalinity in accordance with ASTM D1121; Karl Fischer titration for moisture content in accordance with DIN 51777; and acid, base, and saponification numbers.

Analytic procedures

  1. HPLC — High pressure liquid chromatography
    High pressure liquid chromatography (HPLC) allows us to precisely analyse products and mixtures. We are able to quickly determine the type and quantity of by-products in raw materials as well as the type and quantity of corrosion inhibitors in finished products with this method. The main areas of application beyond research and development include quality assurance for raw materials and finished products in addition to value-added services for our customers.

  2. GC — Gas chromatography
    Similar to high pressure liquid chromatography (HPLC), gas chromatography (GC) is normally used to analyse the composition of vapourisable liquids. In this manner, we are able to determine the purity, type and quantity of the various by-products or of impurities in our raw materials.

  3. AAS — Atomic absorption spectroscopy
    With the help of atomic absorption spectroscopy, the slightest traces of elements such as iron, copper, and zinc can be precisely measured in raw materials and finished goods. Metal contaminants like these could easily have a negative impact on the properties of our finished products. That makes AAS analysis an important part of our quality assurance.