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Evaluation of chrome and aluminum coating by sputtering as an alternative to galvanic chrome

机译:用溅射法代替电镀铬评估铬和铝涂层

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The high corrosion resistance of decorative coatings of hexavalent chromium obtained in electroplating processes is well known for its wide use and high efficiency. This coating has been widely used in the furniture and shoe industry, obtained by electrodeposition in zamac parts. However, the electroplating process has a high degree polluting because the amount of effluent generated and toxicity of chemicals used in the process. It is known that the hexavalent chromium is carcinogenic and its wastes are hazardous and difficult to treat. Faced with this, the development of new technologies is aimed at obtaining processes corrosion resistant, environmentally friendly and economically viable. The alternative technology that can meet this is PVD- physical vapor deposition, with the sputtering process. In this context, this study aims to evaluate and compare the performance of chromium coatings and aluminum applied by sputtering with varnish with the performance of electroplated chrome plating. Therefore, the coatings were applied in zamac and were characterized as the cross-section morphology, electrochemically, and chemically physical. In addition, the coatings were characterized as the application feasibility in the footwear industry, furniture and metal fittings. The results showed that some of the aluminum and chrome finishes deposited by sputtering have similar characteristics in both the electrochemical performance as in the feasibility assessment tests in footwear and furniture industries as compared to the chrome plating in the conventional process, and can be a substitution of alternative sustainable level.
机译:通过电镀工艺获得的六价铬装饰涂层的高耐腐蚀性因其用途广泛和效率高而众所周知。通过在zamac零件中进行电沉积获得的涂料已广泛用于家具和制鞋业。然而,电镀过程具有高度的污染,这是因为产生的废液量和该过程中使用的化学药品的毒性。众所周知,六价铬具有致癌性,其废物是危险的且难以处理。面对这一点,新技术的开发旨在获得耐腐蚀,环保且经济可行的工艺。可以满足此要求的替代技术是采用溅射工艺的PVD物理气相沉积。在这种情况下,本研究旨在评估和比较通过溅射清漆进行镀铬和镀铝的性能与电镀镀铬的性能。因此,该涂料以zamac形式涂覆,并具有横截面形态,电化学和化学物理特性。另外,该涂料被认为是在制鞋业,家具和金属配件中的应用可行性。结果表明,与常规工艺中的镀铬相比,通过溅射沉积的某些铝和铬表面处理剂在电化学性能方面与鞋类和家具行业的可行性评估测试中具有相似的特性,并且可以替代传统工艺中的镀铬。替代可持续水平。

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