Normal-temperature environment-friendly sealing agent for dyed aluminum and aluminum alloy anode oxide film as well as preparation method and application process of normal-temperature environment-friendly sealing agent

The invention discloses a normal-temperature environment-friendly sealing agent for dyeing aluminum and aluminum alloy anode oxide films. The normal-temperature environment-friendly sealing agent comprises the following components by volume mass: 5-10g/L of a main hole sealing substance, 0.2-0.5 g/L of a fixation accelerant, 0.1-1g/L of a pH regulator and the balance of water. A main hole sealing substance calcium magnesium nitrate which can play a sealing role at normal temperature is used, and surface active fatty acid alcohol amine salt which has dual effects of promoting and fixing color and a PH regulator organic amine are matched, so that oxidation film holes can be sealed when the hole sealing agent is used at normal temperature, and meanwhile, the precipitation of dye which is adsorbed into the oxidation film holes in a dyeing process is prevented, so that the hole sealing agent which is good in sealing and good in color fixing effect is obtained. And the decorative aluminum piece is bright in color,