Corrosion character is one of the main characters of Al microchannel heat exchanger. In the present study

standard seawater acidified test (7 and 14 days) were carried out on microchannel heat exchangers with Zn-coated extruded tube and Si-coated extruded tube

and the performances of the test samples before and after the corrosion were tested in order to compare the change of capacity

air side pressure drop and thermal resistance. The result showed that

the long-term performance of the sample with Si-coated extruded tube was much better than the sample with Zn-coated extruded tube.