Browse Publications Technical Papers 940498
1994-03-01

The Effect of Silicate Content in Engine Coolants on the Corrosion Protection of Aluminum Heat-Rejecting Surfaces 940498

The effect of small amounts of silicate on coolant performance has been studied. The corrosion protection provided by different coolant technologies was evaluated for different silicate contents. This work includes results from electrochemical tests and static and dynamic heat-rejecting tests on aluminum surfaces.
The results indicate that small amounts of silicate have a negative effect on the corrosion protection of aluminum. Depletion of silicates can therefor be expected to affect aluminum heat-rejecting surfaces. The use of carboxylic acid corrosion inhibitors can overcome this problem.

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