Objective To improve the rust resistance of zirconium solution by adding a composite corrosion inhibitor. Methods By adding phosphoric acid triethanolamine P2 corrosion inhibitors to the zirconium solution for treatment of aluminum alloy, a layer of new zirconium film was formed on the surface. Scanning electron microscopy (SEM) was used to analyze the surface of the sample after magnifying 20000 times, and compared with concentrate processing samples. Energy spectrum (EDS) and XRD were used to analyze the components, auxiliary copper sulfate spot test was used to determine the enhancement degree of corrosion resistant ability, the lattice test was used to test the adhesion changes of the paint film after surface treatment, and the acidic zirconium salt spray testing (CASS) was used to analyze the adhesion changes of the new zirconium film after processing. Results The results of auxiliary copper sulfate spot test by adding P2 corrosion inhibitor of zirconium fluid indicated that, the time of the same color change increased 48 s. The oxygen element in the samples which were added P2 corrosion inhibitor of zirconium fluid reduced one time than the original sample. The micelle was identified as oxide micelle, and significantly reduced after treatment by the corrosion inhibitor of zirconium fluid. The lattice test had the equal results, and could pass 480 h CASS. Conclusion of zirconium solution adding P2 corrosion inhibitor treatment can enhance the corrosion resistance of aluminum alloy. The corrosion resistance of aluminum alloy can be enhanced by adding P2 corrosion inhibitor to the zirconium solution.