Film forming solution of aluminum material surface collaborative optimization type chromium-free yellow conversion film and method for preparing conversion film
A technology of collaborative optimization and conversion coating, applied in the direction of metal material coating process, etc., can solve the problems of difficult promotion of chromium-free chemical conversion treatment technology, inability to discover product quality problems in time, and difficulty in real-time online judgment, etc., and achieve a wide processing time range. , Excellent protective performance, stable effect of film-forming solution
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[0046] Example 1
[0047] An embodiment of the film-forming solution of the aluminum-based material surface synergistic optimization type chromium-free yellow conversion film of the present invention, the film-forming solution contains the components in the following concentrations:
[0048] Potassium molybdate 25ppm, fluorotitanic acid 25ppm, tannic acid 50ppm, hydrofluoric acid 50ppm, disodium edetate 10ppm, sodium borate 20ppm, fatty alcohol polyoxyethylene ethers 5ppm.
[0049] The components were stirred and dissolved in water, the pH of the solution was adjusted to 3.0, and tap water was added to make the volume of the film-forming solution 1000 mL to obtain the film-forming solution described in this example.
[0050] The method for preparing a synergistically optimized chromium-free yellow conversion coating on the surface of aluminum-based materials using the film-forming solution described in this embodiment includes the following steps:
[0051] (1) Pretreatment: ①Take a 50mm...
Example Embodiment
[0056] Example 2
[0057] An embodiment of the film-forming solution of the aluminum-based material surface synergistic optimization type chromium-free yellow conversion film of the present invention, the film-forming solution contains the components in the following concentrations:
[0058] Sodium molybdate 50ppm, tannic acid 50ppm, hydrofluoric acid 60ppm, disodium edetate 20ppm, sodium silicate 40ppm, fatty alcohol polyoxyethylene ethers 5ppm.
[0059] The components were stirred and dissolved in water, the pH of the solution was adjusted to 3.5, and tap water was added until the volume of the film-forming solution was 1000 mL.
[0060] The method for preparing a synergistically optimized chromium-free yellow conversion coating on the surface of aluminum-based materials using the film-forming solution described in this embodiment includes the following steps:
[0061] (1) Pretreatment: ①Take a 50mm×100mm aluminum material sample and perforate, connect the aluminum wire at the hole; ②...
Example Embodiment
[0065] Example 3
[0066] An embodiment of the film-forming solution of the aluminum-based material surface synergistic optimization type chromium-free yellow conversion film of the present invention, the film-forming solution contains the components in the following concentrations:
[0067] Sodium vanadate 25ppm, fluotitanic acid 75ppm, tannic acid 100ppm, hydrofluoric acid 100ppm, disodium edetate 50ppm, sodium borate 40ppm, sodium dodecylbenzene sulfonate 5ppm.
[0068] The components were stirred and dissolved in water, the pH of the solution was adjusted to 3.5, and tap water was added until the volume of the film-forming solution was 1000 mL.
[0069] The method for preparing a synergistically optimized chromium-free yellow conversion coating on the surface of aluminum-based materials using the film-forming solution described in this embodiment includes the following steps:
[0070] (1) Pretreatment: ①Take a 50mm×100mm aluminum material sample and perforate, connect the aluminum w...
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