The modern electroplater; a complete book considering fully the elementary principles of electro deposition of metals, their practical application and industrial use . Fig. 103.—Goblet Shaped Brush(General Platers Supply Co.) The same general operations may be followed forcleaning brass and copper objects with the exceptionof the final acid dip. To remove the oxide accumula-tion, a potassium cyanide dip is substituted for the Stripping 157 muriatic acid. After rinsing in cold water, the workis immediately placed in the plating tank. It mightbe worth mentioning that finely polished brass andcop
The modern electroplater; a complete book considering fully the elementary principles of electro deposition of metals, their practical application and industrial use . Fig. 103.—Goblet Shaped Brush(General Platers Supply Co.) The same general operations may be followed forcleaning brass and copper objects with the exceptionof the final acid dip. To remove the oxide accumula-tion, a potassium cyanide dip is substituted for the Stripping 157 muriatic acid. After rinsing in cold water, the workis immediately placed in the plating tank. It mightbe worth mentioning that finely polished brass andcopper articles rarely require scouring, but this is,of course, a question to be decided by the plater. Avariety of scouring and cleaning brushes, for differentclasses of work, are shown in Figs. 102, 103 and 104. STRIPPING It is not unusual in the production of commercialwork to discover, after plating is completed, thatsome mechanical operation has been omitted or that,through accident, perhaps, the original finish is dam-. Fig. 104.—Brush for Cleaning the Interior Surfaces ofVessels (General Platers Supply Co.) aged. Before replating can be properly accomplished,the old deposit must be removed. Especially is thistrue of nickel or silver work. Two methods are avail-able : the old deposit may be removed by acid dipping,or else stripped electrically by reversing the currentdirection, thereby using the articles as an anode. 158 The Modem Electroplate?* Copper or brass plating is most easily removed bydipping the work in a hot solution of sulphuric andnitric acids mixed in a proportion of approximatelysix to one by volume. Rinse in hot water afterdipping. A good stripping solution for nickel finishes is com-posed of one part each, by volume, of water, sulphuricacid, and saltpeter (sodium nitrate). Nitric acid maybe substituted for the saltpeter, but in proportionone-fourth that of the sulphuric acid. During thestripping process, continue to move the work backand forth through th
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectelectro, bookyear1920
