Coolant Inhibitor Packs

What are OAT Formulations?

OAT formulations are generally compatible with conventional formulations, but care may need to be taken when mixing colours.

OAT formulations react to some extent with some of the inorganic salts and caustics used in conventional types.

The result in combining the two leads to the generation of cloudiness and loss of extended life properties.

Characteristics of OAT coolant:

• Low inhibitor depletion rates, “fill for life” coolant (Long Life).

• Compatibility with many coolant standards.

• Extreme stability under high temperatures.

• Provides excellent heat transfer rate

 

Coolant Inhibitor Additives

These all fulfill different functions within the coolant:

Coolant Inhibitor Additive

Other additives such as Amines and Phosphate were used in coolants as PH Buffers.

Conventional

Uses conventional technology, in other words, does not use any of the newer style, organic inhibitors.

Organic

Uses 100% organic acid salts

Hybrid

These products use mainly organic acids but with up to two or three conventionaI inhibitors.
Automotive manufacturers will generally specify silicates and phosphates. Heavy Duty engine manufacturers will generally specify nitrites and molybdates.

 

 

What are Corrosion Inhibitors?

A corrosion inhibitor is a chemical compound that, when added to a liquid (in this case coolant), decreases the corrosion rate of a material, typically a metal or alloy.

A common mechanism for inhibiting corrosion involves formation of a coating, often a passivation layer, which prevents access of the corrosive substance to the metal.

Inhibitors only make up a small fraction of the overall coolant as water and glycol form the majority of the product but they can have a vast effect on the performance of the coolant in maintaining the system in good condition.

 

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What is a Hybrid-Organic Coolant?

A Hybrid – Organic inhibitor pack is made from a combination of inorganic salts (as found in traditional coolant) and some fully neutralized organic acids (as found in OAT coolant)

This hybrid technology is also referred to as HOAT technology. This technology makes it very compatible with most coolant types, making it suitable for top-up use with traditional or full OAT coolants.

What are Hybrid (HOAT) Formulations?

Hybrid (HOAT) formulations are called hybrid because they contain ingredients from both OAT and conventional formulas. Hybrid formulations partially or totally eliminate the problem of straight OAT and straight conventional compatibility. Hybrid formulations contain significant concentrations of conventional inhibitors as well as organic carboxylate or other salts.

Characteristics of a Hybrid formulation
  • Nitrites form a stable layer that protects the internal surfaces against corrosion, cavitation and scaling.

  • High reliability.

  • Compatible with engines and cooling systems of different design.

  • Good expertise over years from many car producers.

  • Extended change intervals.