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采用微弧氧化技术在1050纯铝表面制备陶瓷膜,分析了不同制备参数对应的电压与时间曲线.表征了陶瓷氧化膜的厚度、微观形貌,膜层结构和成分;评定了陶瓷氧化膜在NaCI溶液中耐腐蚀性能.随着电流密度的增大,陶瓷膜的厚度呈线性快速增加.微弧氧化后试样具有更高的腐蚀电位和更低的腐蚀电流密度,并且发现铝合金的维钝电流密度可以从0.1A/cm~2降低为10~-7A/cm~2,低的腐蚀电流密度可能是由于膜的厚度、致密度等决定.
The ceramic film was prepared on 1050 pure aluminum by micro-arc oxidation technique, and the voltage and time curves corresponding to the different preparation parameters were analyzed. The thickness, microstructure, structure and composition of the ceramic oxide film were characterized. NaCI solution.As the current density increases, the thickness of the ceramic film increases linearly rapidly.The sample after microarc oxidation has a higher corrosion potential and a lower corrosion current density, and found that the dimension of the aluminum alloy The blunted current density can be reduced from 0.1 A / cm 2 to 10 -7 A / cm 2. The low corrosion current density may be due to the thickness and density of the film.