<p>A bright anodic oxide layer with (NH₄)₂TiF₆ and polysilazane sealing was fabricated to improve the sweat corrosion resistance of 7075 aluminum alloy. The effects of sealing treatment on the reflectivity and corrosion behavior of anodic aluminum oxide were investigated by artificial sweat corrosion test and electrochemical measurement. The surface reflectivity of the one-step sealed sample with (NH₄)₂TiF₆ was slightly increased by the precipitation of the γ-AlOOH, the titanium dioxide and titanium hydroxide which weaken reflections of light in the pores. The uniform and flat surface of the two-step sealed sample with (NH₄)₂TiF₆ and polysilazane reduced the light scattering, which improved the surface reflectivity. After 48&#xa0;h of artificial sweat corrosion, the surface of two-step sealing sample did not change color and corrode, and the surface reflectivity did not decrease significantly. The significant enhancement in sweat corrosion property of bright anodized aluminum after the two-step sealing treatment was mainly due to the volume expansion effect of γ-AlOOH, the deposition effect of the reaction products (titanium dioxide and titanium hydroxide) and the barrier property of polysilazane, which led to the densification of the sealed anodic oxide layer.</p>