Example 5 Plate Thickness Variation in a Workpiece Plated without Use of Conforming Anodes

A cylindrical, cup-shape production part that was plated without the use of conforming anodes is shown in Fig. 6. Thickness of plate varied from a minimum of 6 pm (240 pin.) to a maximum of 25 pm (1000 pin.).

Fig. 6 Variations in plate thickness obtained on a workpiece plated without the use of conforming anodes

Conforming Anodes. Parts of complex shape with stringent dimensional requirements, such as those shown in Fig. 7 and 8, require the use of special techniques, conforming anodes, and shields, in order to obtain the required uniformity of plate thickness.

Fig. 7 Application of shields to obtain shim having a uniform cadmium plating. The 305 mm (12 in.) long and 38 mm (1 in.) wide shim was plated to the required thickness of 13 ± 5 pm (520 ± 200 pin.).

Fig. 7 Application of shields to obtain shim having a uniform cadmium plating. The 305 mm (12 in.) long and 38 mm (1 in.) wide shim was plated to the required thickness of 13 ± 5 pm (520 ± 200 pin.).

Fig. 8 Couplings that were uniformly cadmium plated with the aid of a 6.4 mm (1 in.) diameter anode

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