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EMISSION SCENARIO DOCUMENT ON METAL FINISHING

机译:金属精加工的排放情景文件

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1. Metal finishing encompasses a range of processes carried out by industry. These processes are varied and complex and involve chemical and physical processing, metallurgy and chemical engineering. Metal finishing may be defined as: The deposition of a metallic coating onto a metallic or non-metallic substrate, or the application of an organic coating to a metallic substrate, or the treatment of a metallic substrate by the use of conversion processes, to enhance the appearance, function or performance of a product and to give added value and promote its marketability. 2. Metal finishing thus encompasses many individual technologies, of which the following are the main processes used by industry: Anodising Conversion coating (passivation and phosphating) Electroless plating (autocatalytic) Electroplating (electrodeposition) Galvanising Mechanical plating Metal spraying Painting and lacquering Vacuum deposition Vitreous enamelling 3. Prior to any metal coating or finishing process, products must be cleaned, so as to be free of grease and other surface contamination. The surface must also be conditioned or activated. These pre-treatments are usually an integral part of the process plant installation. In order to produce the required surface smoothness or texture of the finished component, it is often necessary to use polishing and other abrasive techniques prior to the application of the coating. 4. The metal finishing industry can be categorised into four generic areas according to the function of the coating.
机译:1.金属精加工包括工业上执行的一系列过程。这些过程是多种多样且复杂的,涉及化学和物理处理,冶金和化学工程。金属精加工可定义为:在金属或非金属基底上沉积金属涂层,或在金属基底上施加有机涂层,或通过使用转化工艺对金属基底进行处理,以增强产品的外观,功能或性能,并赋予附加值并提高其适销性。 2.因此,金属精加工包含许多单独的技术,其中以下是工业上使用的主要工艺:阳极氧化转化涂层(钝化和磷化)化学镀(自催化)电镀(电沉积)镀锌机械电镀金属喷涂喷涂和上漆真空沉积玻璃体涂漆3.在进行任何金属涂层或表面处理之前,必须清洁产品,以免油脂和其他表面污染。表面也必须经过处理或活化。这些预处理通常是加工厂安装的组成部分。为了使成品部件具有所需的表面光滑度或质感,通常必须在施加涂层之前使用抛光和其他研磨技术。 4.根据涂层的功能,金属精加工行业可分为四个通用领域。

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    《OECD Papers》 |2004年第11期|p.371.1-371.91|共91页
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