Abstract

The behavior of anodic porous alumina film formed on an aluminum surface by anodizing in chromic acid solutions was optimized using Box–Wilson experimental design. The film thickness was correlated as a function of temperature, acid concentration, applied voltage, and time. A mathematical model was suggested and optimized. Results of coating thickness indicate that both temperature and time play an important role in the anodizing process. The interaction effect of variables on the film thickness is less pronounced compared with the effect of the main variables. Optimum film thickness obtained during the anodizing process was 10.43 µm at the optimum value of temperature (45 °C) and time (68 min). The polarization measurement of anodized aluminum ASA 6061 in chromic acid shows a high corrosion resistance in the presence of coating. The results confirmed by using surface morphology investigations.

Graphic Abstract

中文翻译：

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使用Box–Wilson中央复合材料设计的铬酸铝ASA 6061阳极氧化工艺：优化和腐蚀倾向

摘要

使用Box–Wilson实验设计优化了通过在铬酸溶液中进行阳极氧化而在铝表面形成的阳极多孔氧化铝膜的性能。膜厚度与温度，酸浓度，施加电压和时间有关。提出并优化了数学模型。涂层厚度的结果表明温度和时间在阳极氧化过程中都起着重要的作用。与主要变量的影响相比，变量对薄膜厚度的交互作用不太明显。在温度（45°C）和时间（68分钟）的最佳值下，在阳极氧化过程中获得的最佳膜厚度为10.43 µm。阳极氧化铝ASA 6061在铬酸中的极化测量显示，在存在涂层的情况下具有很高的耐腐蚀性。

图形摘要