TM 5-3810-300-24&P-3
Fuel, Oil and Coolant Specifications 13.3
COOLANT INHIBITOR CHART
Inhibitor Compatability
Corrosion
Complete
Ethylene
Methoxy
Inhibitor or
Inhibitor
Inhibitor
Glycol
Propanol
Base
Base
Inhibitor System
Type
System
Water
Antifreeze*
Antifreeze
Sodium chromate
Chromate
No
Yes
No
No
Potassium dichromate
Chromate
No
Yes
No
No
Perry filter elements:
5020 (type OS)
Chromate
Yes
Yes
No
No
S-453 (Spin-on)
Chromate
Yes
Yes
No
No
5030 (type OS)
@Non-chromate
Yes
Yes
Yes
No
S-331 (Spin-on)
@Non-chromate
Yes
Yes
Yes
No
5070 (type OS)
#Non-chromate
Yes
Yes
Yes
No
S-473 (Spin:on)
#Non-chromate
Yes
Yes
Yes
No
Lenroc filter element
Non-chromate
Yes
Yes
Yes
No
Fleetguard filter elements:
DCA (canister)
Non-chromate
Yes
Yes
Yes
No
DCA (Spin-on)
Non-chromate
Yes
Yes
Yes
No
AC filter elements:
DCA (canister)
Non-chromate
Yes
Yes
Yes
No
DCA (Spin-on)
Non-chromate
Yes
Yes
Yes
No
Luber-Finer filter elements:
LW-4739 (canister)
Non-chromate
Yes
Yes
Yes
No
LFW-4744 (spin-on)
Non-chromate
Yes
Yes
Yes
No
Nalcool 2000 (liquid)
Non-chromate
Yes
Yes
Yes
No
Perry LP-20 (liquid)
Non-chromate
Yes
Yes
Yes
No
Lubercool (liquid)
Non-chromate
Yes
Yes
Yes
No
Dowtherm cooling sys
Non-chromate
Yes
Yes
Yes
Yes
- tem conditioner
*Dowtherm 209, or equivalent.
@Perry "Year Around" formula.
#Perry "Universal Around" formula.
Figure 2
protection has been discussed earlier under the section
Non-Chromates
on Corrosion Inhibitors. The pH control is used to
Non-chromate inhibitors (borates, nitrates, nitrites, etc.)
maintain an acid free solution. The water softening
provide corrosion protection in the cooling system with
ability deters formation of mineral deposits. Inhibitor
the basic advantage that they can be used with either
systems are available in various forms such as coolant
water or a water and ethylene glycol solution.
filter elements, liquid and dry bulk inhibitor additives and
INHIBITOR SYSTEMS
as an integral part of permanent antifreeze.
An inhibitor system is considered as a combination of
chemical compounds which provide corrosion protection,
pH control and water softening ability.
Corrosion
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