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Corrosion of Cast Aluminum Alloys under Heat-Transfer Conditions
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English
Abstract
Most coolant formulations designed for cast iron engines are unsatisfactory for aluminum head/block use because of excessive heat-transfer corrosion, resulting in heavy corrosion product deposition and loss of cooling efficiency in the radiator.
The effect of inhibitor and buffer additives, singly and in combination, on the heat-transfer corrosion rates for cast aluminum alloys was investigated. It was shown that some tetraborate and phosphate mixtures can be excessively corrosive. Silicate, in contrast, effectively protects the heat-transfer surfaces.
In addition, the effects of heat-transfer surface temperature, nucleate boiling, and variations in glycol, dissolved oxygen and chloride concentrations on the heat-transfer corrosion rate were investigated.
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Citation
Wiggle, R., Hospadaruk, V., and Tibaudo, F., "Corrosion of Cast Aluminum Alloys under Heat-Transfer Conditions," SAE Technical Paper 810038, 1981, https://doi.org/10.4271/810038.Also In
References
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