Electroplating applications

Gold. Used both in decorative and electronic electroplating applications, about 27.5 t of gold were consumed in the United States in 1990 (8)... 

Another comparatively recent development is poly(butylene terephthalate) heavily filled for electroplating applications. For a plastic it has unusually high density and so gives components much heavier than would be made with conventional unfilled polymers. In some instances this is regarded as desirable—the heavier mouldings are closer in weight and in feel to components cast or machined from metal. Since they are more familiar they are perceived to be of better quality—a concept apparently quite important for uses such as bathroom fittings and plumbers requisites. 

Fig. 1. From the series of first aluminum depositions from NalEtsAl-F-AIEtj]. Left coating for electroplating applications. Right thick layer for refining applications.

A variety of procedures have been identified for the interconversion of sulfonyl derivatives. Because of their high acidity, sulfonic acids can readily be neutralized with inorganic bases or organic amines to form salts. Conversion of metal salts back to the acid form is often desirable in synthetic or electroplating applications. Direct acidification of alkali metal sulfonates with HCl affords the sulfonic acid with precipitation of the formed metal halide salt. An alternative approach is to convert the salt back to the acid by elec-trodialysis. Recovery and recycle of MSA from spent metal plating baths have been described. 

Methane sulfonic acid is used as an electrolyte for electroplating of tin onto sheet steel, for plating tin and tin/lead alloy onto nickel or other base metal substrates in the manufacture of lead frames and bump-contacts for microelectronic devices.It can also be used for copper deposition during the manufacture of microprocessors. Other alkanesulfonic acids have also found use in electroplating applications. Disodium methanedisulfonate and other alkanedisulfonate salts are used in chrome plating.As discussed previously, several processes for the recovery and recycle of alkanesulfonic acids from spent metal plating baths have been described. 

If a barrel plating run uses 200.0 A for exactly 6 hours for an electroplating application at 0.30 Y, how many kilowatt-hours have been used in the run If the voltage is 0.90V what is the power usage (in kWh) ... 

Diethylamine is used in textile specialty applications as well as in pesticide applications. It is also a corrosion inhibitor and is used in electroplating applications. 

Electroplating Application of a coating by use of electric current. An anode (-I-) and cathode —) is immersed in an aqueous medium (electrolyte) through which current is passed. For instance, in chromium plating the electrolyte contains chromic acid, sulfuric acid, sodium fluoride and sodium fluosilicate. The bath is operated at 90° C at current densities up to 30A/cm. ... 

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