Transcription of AP-42, CH 12.20: Electroplating
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AP-42, CH 12.20: Electroplating
ElectroplatingThis section addresses the Electroplating industry. However, emphasis is placed on chromiumelectroplating and chromic acid anodizing because the majority of emissions data and otherinformation available were for this area of the Electroplating industry. Detailed information on theprocess operations, emissions, and controls associated with other types of Electroplating will be addedto this section as it becomes available. The six-digit Source Classification Code (SCC) forelectroplating is Process Description1-4 Electroplating is the process of applying a metallic coating to an article by passing an electriccurrent through an electrolyte in contact with the article, thereby forming a surface having propertiesor dimensions different from those of the article.
Hexavalent chromium plating baths are the most widely used baths to deposit chromium on metal. Hexavalent chromium baths are composed of chromic acid, sulfuric acid, and water. The chromic acid is the source of the hexavalent chromium that reacts and deposits on the metal and is emitted to the atmosphere.
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