Abstract

SummaryModern chemical processes for the removal of defective electrodeposits have been developed to a high degree of selectivity. There are, however, disadvantages which offset this, namely stripping rates are limited by the kinetics of the reaction and increasing difficulties associated with the disposal of the dissolved metals. Electrolytic strippers, controlled by parameters very similar but opposite to the electrodeposition processes, offer the possibility to overcome these disadvantages. This paper describes the development of nitrate based electrolytic stripping technology and the rôle of carboxylic acids in obtaining selectivity on steel substrates. The operating characteristics of a modern electrolytic stripper are described.

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