The object of this investigation was to determine whether or not current military coolants were compatible with aluminum automotive codling system components.nBench corrosion tests were used to predict the effect of the antifreeze compounds on cooling system metals. Several coolant and inhibitor combinations were then evaluated in simulated vehicle circulation units containing aluminum components in conjunction with standard cooling system metals.nIt was concluded that the presence of aluminum in military automotive cooling systems would present no immediate incompatibility problem with military coolants. There is an indication that extended use, beyond one year, of military coolants would create a corrosion problem in cast iron/aluminum systems.
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