高温封孔时必须防止白霜的生成,因为白霜有损于阳极氧化涂层、尤其是电解上色涂层的外观。白霜层容易产生对所需颜色不利的虹彩光干扰。白霜还会侵入基体材料,导致潜在的腐蚀现象。高温封孔后,可观察到3个不同的区域。第一个区域接近阻挡层,这个区域中氧化物的孔充满了含水量很高的氢氧化物的凝胶体。第2个区域从第1区延伸到氧 The formation of hoarfrost must be prevented when sealing at high temperatures, as hoarfrost detracts from the appearance of anodized coatings, especially electrochromic coatings. Hoar frost tends to produce iridescent light that is detrimental to the desired color. Frost also invades the matrix material, leading to potential corrosion. After sealing at high temperature, three different areas can be observed. The first zone is close to the barrier, where the pores of the oxide are filled with a gel of a hydrated hydroxide. The second zone extends from Zone 1 to oxygen