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Engine coolants

Efficient heat transfer and overall corrosion protection have always been the key criteria for engine coolants. This has been the case for years for combustion engines, but remains just as important with electric vehicles. Market demands are changing rapidly, and vehicle manufacturers are continuously looking for innovative designs, leading to increasingly specific and stringent requirements regarding corrosion protection, component compatibility and heat transfer.

Those requirements in general but particularly the heat transfer capacity of coolants will play a growing role in meeting the regulations and norms on exhaust gas emission. The exhaust gas emissions of a vehicle are closely linked to the energy efficiency of fossil fuel, electrical energy or combination thereof (hybridization) in the operation of a vehicle. The appropriate coolant and its thermal management capabilities in combustion engines, electrically driven or hybridized vehicles will have an increasing impact on the ability of the automotive industry to meet the requirements of the current and forthcoming exhaust gas regulations.

Arteco follows the market trends very closely and its coolants are suitable for a wide range of engines: combustion engines, gas engines and electrically driven engines. To know which coolant is best suited for your type of engine and requirements, please contact your local area sales manager.

The basic requirement of an engine coolant is to transfer heat from the internal combustion engine to the radiator, where the fluid is cooled by means of airflow. Furthermore, the coolant needs to provide year-round protection against freezing and boiling. A large number of materials are used in the modern cooling system including steel, copper, aluminium, solder, cast iron, brass, plastics and numerous types of elastomers. Engine coolants must contain specific additives (such as corrosion inhibitors) to prevent damage to all these materials.

An engine coolant typically consists of a base fluid and an additive package made up of mostly corrosion inhibitor additives. The base fluid mainly determines heat transfer properties, freezing protection and boiling protection. Corrosion protection is mainly determined by the type and level of corrosion inhibition additives. A distinction is made between organic inhibitors and mineral (also called inorganic) inhibitors such as silicates, borates, nitrites and phosphates.

An easy way to classify coolants is by the type of corrosion inhibitors.  A traditional coolant contains mineral/inorganic inhibitors, such as phosphate, borate, silicate, nitrite and nitrate, with some regional preference with regard to different combinations. An organic additive technology (OAT) coolant contains only organic corrosion inhibitors, such as carboxylates. Combinations of mineral and organic inhibitors can be divided into two other categories: lobrid for coolants with an OAT-backbone with some mineral additives added, and hybrid coolants for any other combination.

Arteco’s product range covers all the different technologies: inhibitor packages that are fully organic, fully mineral or a combination of organic and inorganic inhibitors, all depending on the performance objectives and composition requirements of the customer.

Our engine coolants are suitable for an extensive range of applications, such as passenger cars, heavy-duty trucks, construction equipment, buses, and stationary and marine engines. They are supported by a list of key OEM (Original Equipment Manufacturer) approvals. These approval programmes are extremely stringent following intensive lab tests on corrosion compatibility and stability, dynamic engine tests are performed, followed by real-life fleet testing. In addition, OEM-specific restricted substances lists make this process a very customer-focused approach.

Arteco stays on top of technology trends and market shifts, and works together with its customers to find innovative and creative solutions to each problem. Our coolants are available either as ready-mix, concentrate or super concentrate (inhibitor package).