Tests have been carried out in an antifreeze test rig to investigate the corrosion resistance of aluminium alloys to antifreeze solutions conforming to B.S. 3150 and B.S. 3151. The results have shown that both antifreeze solutions have a similar corrosivity towards aluminium alloys and that, in general, these rates are low. The shape and the position of the specimen in the test rig determined the amount of corrosion. Pitting attack occurred on flat specimens in virtually stagnant conditions, whilst very little corrosion occurred on specimens immersed in a high rate of coolant flow.
