A non-chrome treatment technology has been developed, with 10 g/L KMnO4+20 g/L Na2HPO4+ 1.0 g/L KF, with 9.5 the solution pH, with 10 min the processing time, and 60 ℃ the processing temperature. A comparison has been made between the test results of the copper sulfate experiment, seawater corrosion experiment and alkali leaching experiment for the preparation of manganese oxide passivation films and chromate passivation films. The results show that manganate passivation films help to significantly improve the corrosion resistance of aluminum tubes, with a better performance in this aspect than that of conventional chromate passivation films. And experiments conducted on the electrochemical Tafel polarization curves indicate that the existence of manganate passivation films helps to make the corrosion potential of Al shift positively, thus reducing the corrosion current density significantly and decreasing the corrosion rate of Al effectively.