My Basket

You currently have 0 items in your basket. Please add items to be able to checkout.
 

Follow us on Facebook

Advanced Search

Search for:
Category: Sub-Category:
Engine Company:
Antifreeze

Antifreeze

Antifreeze water mixture

Most automotive engines are "water"-cooled to remove waste heat, although the "water" is actually antifreeze/water mixture and not plain water. The term engine coolant is widely used in the automotive industry, which covers its primary function of convective heat transfer for internal combustion engines. When used in an automotive context, corrosion inhibitors are added to help protect vehicles' radiators, which often contain a range of electrochemically incompatible metals (aluminumcast ironcopperbrasssolder, et cetera). Water pump seal lubricant is also added.

Antifreeze was developed to overcome the shortcomings of water as a heat transfer fluid. In some engines freeze plugs (engine block expansion plugs) are placed in areas of the engine block where coolant flows in order to protect the engine from freeze damage if the ambient temperature drops below the freezing point of the antifreeze/water mixture. These should not be confused with core plugs, whose purpose is to allow removal of sand used in the casting process of engine blocks (core plugs will be pushed out if the coolant freezes, though).

On the other hand, if the engine coolant gets too hot, it might boil while inside the engine, causing voids (pockets of steam), leading to localized hot spots and the catastrophic failure of the engine. If plain water were to be used as an engine coolant, it would promote galvanic corrosion. Proper engine coolant and a pressurized coolant system can help obviate the problems which make plain water incompatible with automotive engines. With proper antifreeze a wide temperature range can be tolerated by the engine coolant, such as−34 °F (−37 °C) to +265 °F (129 °C) for 50% (by volume) propylene glycol diluted with water and a 15 psi pressurized coolant system.

 

 


Spec Oils
Quick Links
About Us

Lubricants Online offers a comprehensive range of lubrication products for automotive and industrial usage. Lubricants Online hosts products from all the well known brand name lubricant companies and can be delivered directly to your doorstep anywhere in South Africa – no hassle, no fuss.

Read more

Get a Quick Quote

To get a quick quote complete the
form so we can assist you with
a formal quote.

Complete the form

Copyright © Lubricants Online