METALGUARD® E-5000

METALGUARD® E-5000 low-conductivity additive package is for use in applications which require both efficient heat transfer and low electrical conductivity. Low-conductivity coolants can be used for applications that require electrical insulation for performance and safety. Coolants made with E-5000 additive maintain a stable, low-conductivity over a long period of time through E-5000’s proprietary formulation of non-ionic corrosion inhibitors. This mechanism is essential to maintain safe operation of battery powered vehicles and other electronics cooling applications. E-5000 coolant protects aluminum, copper, brass, stainless steel, and titanium. It is compatible with most elastomers and other materials including silicon rubber, viton, EPDM and graphite. It is not compatible with carbon steel, cast iron, or zinc/galvanized steel.

In the computer data storage center market, an emphasis has been placed on converting mineral-oil-based immersion fluids that insulate and cool the computer chips directly, to more heat transfer efficient, low-conductivity inhibited glycol/water fluids. The growth in AI (artificial intelligence) and cryptocurrency mining, both requiring massive data storage and memory space, have dramatically increased the need for high-speed data processing computer servers for information storage and data calculation. METALGUARD® E-5000 can be used to make the inhibited low-conductivity 1.5 – 5.0 µS/cm (microsiemens/cm) glycol/water fluids for these data centers.

The METALGUARD® E-5000 and finished fluids made from the additive, can also be used to make both types of low conductivity coolants used in the automotive market. ASTM D8566 for battery powered electric vehicles requires a maximum electrical conductivity of ≤100 µS/cm and fuel cell coolant ≤5 µS/cm meeting ASTM D8565.

For low-conductivity computer data processing centers and fuel cell coolant, the deionized (DI) water must be 0-2µS/cm and glycol must have a conductivity of 0-2 microsiemens/cm. For electric vehicle applications, there is more leeway. The DI water, glycol and additive must all combine to be less than 100 microsiemens/cm, per ASTM D8566. However, most electric vehicle manufacturers want to see ≤50 µS/cm in the new coolant because the coolant will pick-up conductivity from the engine materials of construction over time; therefore, WEBA recommends providing an initial conductivity well below 100. As a note, dye or regular colorant of any type should never be added to the finished coolant. Even a small amount of such ionic solutions will cause a dramatic increase in the fluid’s electrical conductivity.

WEBA Technology can make finished coolants for customers who do not have access to adequately deionized water and/or low-conductivity ethylene glycol. The E-5000 additive is used to make two different finished coolants: METALGUARD® E-5100 (≤100 µS/cm) and METALGUARD® E-5500 (≤5 µS/cm). METALGUARD low-conductivity products should never be used in internal combustion engine cooling systems.

Specifications

Properly manufactured coolant can meet:
• ASTM D8566 for electric vehicles
• ASTM D8565 for fuel cell vehicles