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PROCESS FOR THE ANODIC OXIDATION OF ALUMINUM MATERIAL OR ITS ALLOYS IN THE FORM OF TAPE, SHEET OR PLATE, PROCESS FOR THE PRODUCTION OF A SUPPORT MATERIAL FOR PRINTING PLATES, AND APPLICATION OF THE FIRST MATERIAL MENTIONED
PROCESS FOR THE ANODIC OXIDATION OF ALUMINUM MATERIAL OR ITS ALLOYS IN THE FORM OF TAPE, SHEET OR PLATE, PROCESS FOR THE PRODUCTION OF A SUPPORT MATERIAL FOR PRINTING PLATES, AND APPLICATION OF THE FIRST MATERIAL MENTIONED
This invention relates to an improvement in the process for anodically oxidizing materials in the form of strips, foils, or sheets composed of aluminum or aluminum alloys in an aqueous electrolyte containing sulfuric acid and phosphoric acid, if appropriate, after a previous mechanical, chemical or electrochemical roughening, the improvement which comprises anodically oxidizing the material in an electrolyte having a concentration of sulfuric acid ranging from about 25 to 150 g per liter, of phosphoric acid ranging from about 10 to 50 g per liter, and of aluminum ions ranging from about 5 to 25 g per liter, at a current density ranging from about 4 to 25 A/dm2, and a temperature ranging from about 25 DEG to 65 DEG C.
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机译:本发明涉及一种在含有硫酸和磷酸的含水电解质中,经过适当的机械,化学或化学处理后,对由铝或铝合金组成的条,箔或片材形式的材料进行阳极氧化的方法的改进。电化学粗化,该改进包括将电解质中的材料进行阳极氧化,该电解质的硫酸浓度范围为每升约25至150克,磷酸浓度范围为每升约10至50克,铝离子范围为在大约4至25 A / dm2的电流密度和大约25至65℃的温度下,每升5至25 g。
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