Abstract
Iron-zinc alloy coatings applied by electrodeposition have been tested for their protective quality on steel exposed to an industrial atmosphere. A coating consisting of iron 40% and zinc 60% was twice as corrosion-resistant as a zinc e1ectrodeposit of the same thickness. The improvement was more noticeable for the thicker coatings (1 or 2 mils) than for the thinner ones (0·1 or 0·5 mils). Coatings containlng from 50 to 80 % of zinc and the remainder iron were almost as good. The coatings developed a rather unattractive uniform dark grey-brown colour which was, however, clearly distinguishable from rusting of the steel. Resistance to damage, proteciion at scratches, the effect of superimposed paint films and the performance of the coatings in other atmospheres will need checking before they can be used commercially.
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