Silver-white normal-temperature high-corrosion-resistance sealing agent for aluminum and aluminum alloy anode oxide film as well as preparation method and application process of silver-white normal-temperature high-corrosion-resistance sealing agent

The invention relates to the technical field of aluminum and aluminum alloy surface treatment, and discloses a silvery white normal-temperature high-corrosion-resistance sealing agent for an aluminum and aluminum alloy anode oxide film and a preparation method and an application process of the silvery white normal-temperature high-corrosion-resistance sealing agent. The sealing agent is prepared from the following components: a main hole sealing substance, a color complementary agent, a pH regulator and water. The main hole sealing substance is nickel fluoride; the color complementing agent is potassium permanganate. Potassium permanganate is dissolved in water to present amaranth and is complementary with yellow green to present colorless, so that a closed oxidation film presents the natural silver white color of aluminum, moreover, permanganate radicals can be bonded with aluminum ions to generate aluminum permanganate which is deposited in oxidation film holes, and through co-deposition of aluminum permang