Metal salt-free sealing agent for aluminum alloy anodic oxide film
An anodized film, aluminum alloy technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of environmental pollution, such as the cost of sealing film grade sealing agent, to reduce the loss of dyes, easy to Biodegradation, good environmental compatibility
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Embodiment 1
[0055] Sealant composition:
[0056] Lauryl ethanolamine 3.0g / L
[0057] Ammonium acetate 6.5g / L
[0058] Isomerized lauryl polyoxyethylene ether 1.0g / L
[0059] Acrylic polymer 1.2g / L
[0060] Deionized water balance
[0061] Process conditions: pH (adjusted with acetic acid or ammonia water) 5.5-6.5, temperature 80-86°C, sealing time 20 minutes.
[0062] There is no water stain on the surface of the sample, no "powder frost", and no pollutants when wiped with wet filter paper. Phosphorus-chromic acid method weight loss 18.9mg / dm 2 . Dyed anodized film does not fade.
Embodiment 2
[0064] Sealant composition:
[0065] Lauryl ethanolamine 1.5g / L
[0066] Ammonium citrate 8.4g / L
[0067] Isomerized lauryl polyoxyethylene ether 1.6g / L
[0068] Polyurethane-acrylic acid copolymer 0.7g / L
[0069] Deionized water balance
[0070] Process conditions: pH (adjusted with acetic acid or ammonia water) 5.5-6.0, temperature 85-90°C, sealing time 15 minutes.
[0071] There is no water stain on the surface of the sample, no "powder frost", and no pollutants when wiped with wet filter paper. Phosphorus-chromic acid method weight loss 24.6mg / dm 2 . Dyed anodized film does not fade.
example 3
[0073] Sealant composition:
[0074] Lauryl ethanolamine 8.4g / L
[0075] Ammonium acetate 2.3g / L
[0076] Isomerized Lauryl Polyoxygen 0.7g / L
[0077] Polyurethane-acrylic acid copolymer 1.8g / L
[0078] Deionized water balance
[0079] Process conditions: pH (adjusted with acetic acid or ammonia water) 6.0-6.5, temperature 80-85°C, sealing time 25 minutes.
[0080] There is no water stain on the surface of the sample, no "powder frost", and no pollutants when wiped with wet filter paper. Phosphorus-chromic acid method weight loss 22.5mg / dm 2 . Dyed anodized film is slightly discolored.
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