Coolant Technologies & Application
Compared to the glycol/ water or water content, the corrosion inhibitor package forms a smaller percentage in the overall composition of coolant however its function is absolutely critical to the performance of the fluid. The combination of water, glycol/water, air and heat form a potent mixture that is able to attack even the strongest of metals and components over time if they are left unprotected. This mixture enables the ideal condition for corrosion of vital engine components. Such corrosion can take a variety of forms, most notable as rust that can spread over wide surfaces or eat deep holes into the metal. It can also liberate particulates in the fluid that can accumulate over time and clog vital ducts within the radiator, reducing its ability to remove heat and subsequently reduce engine performance or in severe cases, cause engine breakdown. Other forms of corrosion include pitting by cavitation
Corrosion inhibitors are designed to bind chemically to the metals of the cooling system to form a protective layer several molecules thick on its surface. The key to a coolant’s ultimate performance and lifespan is directly related to the inhibitors it contains. A critical factor is to find the right mix of inhibitors which is optimally adjusted to the different metals and types of corrosion to suit the environment in which the coolant is to be used.
The corrosion inhibitor package and coolants in general therefore can be categorized into the following technologies: