电解抛光单晶和多晶铝以获得高光学和机械表面
Electropolishing of single crystal and polycrystalline aluminum to achieve high optical and mechanical surfaces
摘要：
电解抛光作为金属产品的最终表面处理在机械工程和仪器仪表、医药和光伏电池的反射聚光器中得到了广泛的应用。结果表明，电抛光不仅降低了表面粗糙度，改变了表面形貌，而且改善了铁磁金属的耐腐蚀性、耐久性、抗拉强度等性能，改变了铁磁金属的反射率、电磁导磁率和电子发射等物理化学性能。这一事实大大扩展了在科学和技术的各个领域使用这种方法的可能性。这项工作是一项研究的一部分，研究了电解抛光，以减少邻近表面的晶体缺陷，从而改善其物理性能，有助于提高光伏发电和存储设备的光学效率。使用不同的温度和电流密度参数检查五种组合物。使用反射光谱法评估抛光的样品。发现由磷酸-85%、乙酸-10%、硝酸- 5%组成的溶液提供最佳结果。获得的另一个结果是，反射率随着电流密度增加到25 A/dm 2而增加。进一步增加电流密度导致表面劣化和反射率降低。结果表明，仔细研磨和抛光，然后使用建议的解决方案进行电抛光可能包括一个足够的处理，为光伏电池制备反射聚光器。
英文摘要：
Electropolishing has found wide application as the final surface treatment of metal products in mechanical engineering and instrumentation, medicine and reflective concentrators for PV cells. It was found that electropolishing (EP) not only reduces the surface roughness and changes its appearance, but improves many operational characteristics as well, such as corrosion resistance, endurance, tensile strength, and many others, and also changes the physicochemical properties, for example, reflectivity, electromagnetic permeability and electronic emission of some ferro-magnetic metals. This fact greatly expands the possibility of using this method in various fields of science and technology. This work is part of a study, examining electro polishing for reducing the crystalline defects adjacent to the surface, thus improving its physical properties, contributing to higher optical efficiency, when used in PV generation and storage devices. Five compositions were examined using different temperature and current density parameters. The polished samples were evaluated using reflectance spectrometry. The solution which was composed of Phosphoric acid - 85%, Acetic acid - 10%, Nitric acid - 5% was found to provide the best results. Another result obtained was that reflectance increased as the current density increased up to 25 A/dm2. Further increasing the current density resulted in deterioration of the surface and reduced reflectance. It was shown that careful lapping and polishing followed by electropolishing using the suggested solution may consist of an adequate treatment for preparing reflective concentrators for PV cells.
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