Sacrificial corrosion protection ability of aluminum alloys for automobile heat exchangers

摘要

Aluminum is widely used in automobile heat exchangers in order to decrease their weight and improve efficiency. Normally aluminum corrodes by pitting, and this can cause leakage, which is fatal to the heat exchanger. Mechanisms of sacrificialcorrosion are therefore used to suppress pitting in heat exchangers made of aluminum. The ability scope of such sacrificial materials in suppressing corrosion is investigated using scanning electrodes, and the results of the evaluation are reported.