SummaryReaction products of aldehydes and amines have been shown to be capable of acting as brightening agents in the electrodeposition of tin from acid solutions. A reproducible method of preparing a stable brightening agent from o-toluidine and acetaldchyde has been devised and the use of this agent in a stannous sulphate electrolyte containing cresolsulphonic acid and sodium n-octyl sulphate has been developed. The plating bath, after working in, gives fully bright, ductile deposits at current densities of 10 A/ft2 upwards with slow cathode movement.
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Clarke et al. (1962) studied this question.
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