Abstract
The corrosion resistance of zinc coatings deposited on mild steel from one Mines Branch and three commercial cyanide plating baths were compared by the following three testing methods: (a) neutral salt spray, (b) humidified S02-air, and (c) combined humidified S02-air and environmental chamber. No significant difference in corrosion rate was found when coatings of equal thickness prepared from the four different baths were tested under identical conditions. The corrosion resistance of the zinc coatings at various thickness levels indicated that the service lives of the coatings depended on the thickness of zinc applied and not on the type of bath from which the zinc was deposited.
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