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.
times. All other factors being equal, high voltages tend to produce bright transparent films, and lower voltages tend to produce opaque films. Raising the bath temperature increases current density to produce thicker films in a given time period. Temperatures up to 49°C (120°F) typically are used to produce films that are to be colored by dyeing.
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