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日本特许公报介绍了一种着色性能优良的高强度铝合金的制造方法。高纯度铝及合金成分低的铝合金阳极氧化着色性能优越。不过,随着旨在提高强度和表面硬度而提高合金化程度的同时,其阳极氧化着色性能却相应下降了。也就是说,当使着色剂扩散到表面氧化形成的氢氧化物层时以及随后的封孔处理固定着色剂时,着色剂产生了明显的变色倾向。以往人们一直认为铝合金的高机械性能与高阳极氧化着色性
Japanese Patent Gazette describes a method of manufacturing a high-strength aluminum alloy excellent in coloring property. High-purity aluminum and alloy composition of the aluminum alloy low anodizing coloring superior performance. However, as the aim is to increase the degree of alloying with the aim of increasing the strength and the surface hardness, the anodizing coloration properties are correspondingly decreased. That is, when the colorant is diffused into the hydroxide layer formed by surface oxidation and then the colorant is fixed by the plugging treatment, the colorant gives a noticeable discoloring tendency. In the past people always think that the high mechanical properties of aluminum alloy with high anodizing colorability