Preparation method of self-healing conversion film coated with rare earth elements on the surface of magnesium-aluminum alloy
A magnesium-aluminum alloy and rare earth element technology, which is applied in the field of self-repairing conversion coating preparation, can solve the problems of micropores in the coating, and achieve the effects of increasing the content of corrosion inhibitors, preventing micropores, and improving corrosion resistance
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specific Embodiment approach 1
[0025] Specific implementation mode 1: In this implementation mode, the preparation method of the rare earth element self-repairing conversion film coated with microcapsules on the surface of magnesium-aluminum alloy is as follows:
[0026] 1. Add gelatin to water and stir at 35-55°C for 10 minutes to obtain an aqueous gelatin solution with a concentration of 10-20 g / L;
[0027] Add gum arabic to water and stir at 40°C for 10 minutes to adjust the pH to 5-6.5 to obtain a 20-40 g / L aqueous solution of gum arabic;
[0028] 2. Add the gum arabic aqueous solution to the gelatin aqueous solution under stirring conditions, stir for 10-20min, the volume ratio of the gum arabic aqueous solution to the gelatin aqueous solution is 1:1, and then add the rare earth ion solution with a concentration of 5-10g / L, Stir at room temperature for 6 hours to obtain a microcapsule solution coated with a sustained-release agent;
[0029] 3. Add the microcapsule solution coated with slow-release age...
specific Embodiment approach 2
[0032] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 1, HCl with a mass concentration of 36% is used to adjust the pH value. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0033] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the ions in the rare earth ion solution described in step 2 are cerium ions. Others are the same as those in the first or second embodiment.
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