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首页> 外文期刊>Corrosion science >A TWO STEP ANODIZING PROCESS OF ALUMINIUM AS A MEANS FOR IMPROVING THE CHEMICAL AND PHYSICAL PROPERTIES OF OXIDE FILMS
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A TWO STEP ANODIZING PROCESS OF ALUMINIUM AS A MEANS FOR IMPROVING THE CHEMICAL AND PHYSICAL PROPERTIES OF OXIDE FILMS

机译：铝的两步阳极氧化工艺，以改善氧化膜的化学和物理性能

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摘要

An anodizing process was developed to form corrosion resistant and hard oxide films on aluminium. The process consists of two steps: first the formation of chromate/phosphate treated layer on the surface of aluminium and secondly anodizing in a sulphuric acid solution. The anodic oxide films formed by the present process contain Cr(III) and phosphate species mostly in the outer part of the porous layer. The films formed by the present process provided a better corrosion resistance to the substrate aluminium from pitting in a chloride medium than the films formed by conventional anodizing and sealed in a boiling chromate solution. Further, Vickers hardness on the cross section of film increased compared with the films formed by conventional anodizing. This two step process can be developed to form other composite oxide films by using different treatments for the first step.
机译：开发了一种阳极氧化工艺，以在铝上形成耐腐蚀和硬质氧化膜。该方法包括两个步骤：首先在铝表面上形成铬酸盐/磷酸盐处理层，然后在硫酸溶液中进行阳极氧化。通过本发明方法形成的阳极氧化膜在多孔层的外部大部分包含Cr（III）和磷酸盐种类。与通过常规阳极氧化形成并密封在沸腾铬酸盐溶液中形成的膜相比，通过本发明方法形成的膜对在腐蚀介质中点蚀的基材铝具有更好的耐腐蚀性。此外，与通过常规阳极氧化形成的膜相比，膜的横截面上的维氏硬度增加。可以通过对第一步使用不同的处理来开发这两个步骤的过程以形成其他复合氧化物膜。

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