铝合金阳极氧化膜无金属盐封闭剂

Metal salt-free sealing agent for aluminum alloy anodic oxide film

Abstract

The invention provides a metal salt-free sealing agent for an aluminum alloy anodic oxide film, belonging to the technical field of aluminum alloy anodic oxide film post treatment. The sealing agent of the invention is prepared by water solution composed of 1.0-10g/L of a hydration accelerator, 0.01-2g/L of a wetting agent, 0.01-3g/L of an ash inhibitor and 1-15g/L of a pH buffering agent, wherein the pH of workpiece fluid is 5.5-6.5, the operating temperature is 70-90 DEG C, and the sealing speed is 1.0-2.0min/um. The metal salt-free sealing agent creatively adopts organic compounds which are easily subject to biodegradation, does not contain any metal ions of nickel, cobalt, magnesium, calcium, lithium and the like as well as fluorinions, and obtains satisfactory sealing effect of the nano-pores of the aluminum alloy anodic oxide film by virtue of the scientific and coordinated component formula of the water solution; the aluminum alloy anodic oxide film obtained by seal treatment through the sealing agent has the advantages of good corrosion resistance, capability of meeting the requirements of GB 14952.1-94, good light-protection and color-protection properties of a film layer, no ash and pruina, no water stain after drying as well as light flowing color and small color difference change in case of sealing the organic dyeing film; and the metal salt-free sealing agent is widely applicable to sealing treatment of an original-color anodic oxide film, an electrolytic coloring anodic oxide film, a hard oxide film and a dyeing anodic oxide film.
本发明铝合金阳极氧化膜无金属盐封闭剂,属铝合金阳极氧化膜后处理技术领域,本发明封闭剂由水合促进剂1.0-10g/L、润湿剂0.01-2g/L、抑灰剂0.01-3g/L和pH缓冲剂1-15g/L的水溶液组成,工件液pH5.5-6.5,工作温度70-90℃,封闭速度1.0-2.0min/um,本发明创造性选用了容易生物降解的有机化合物,不含镍、钴、镁、钙、锂等任何金属离子及氟离子,以其科学协调的水溶液组份配方,获得了满意的铝合金阳极氧化膜纳米孔封闭效果:经本封闭剂封闭处理的铝合金阳极氧化膜抗腐蚀性好,满足GB 14952.1-94要求,膜层保光保色性好,无灰无粉霜,烘干后无水渍,封封闭有机染色膜时流色轻,色差变化小,广泛适用于本色阳极氧化膜、电解着色阳极氧化膜、硬质氧化膜以及染色阳极氧化膜的封孔处理。

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