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.
Corrosion of Cast Aluminum Alloys under Heat-Transfer Conditions
Sae Technical Papers
SAE International Congress and Exposition ; 1981
1981-02-01
Conference paper
English
Coolants , Heat transfer , Casting alloys , Radiators , Corrosion , Oxygen
Corrosion of cast aluminum alloys under heat-transfer conditions
Automotive engineering | 1981
|Corrosion of Die Cast Magnesium-Aluminum Alloys
SAE Technical Papers | 1993
|Corrosion of die cast magnesium-aluminum alloys
Automotive engineering | 1993
|Corrosion fatigue of cast aluminum alloys in engine coolant
Tema Archive | 2007
|Heat Transfer and Engine Cooling, Aluminum versus Cast Iron
SAE Technical Papers | 1963
|