Cadmium plating has been used to protect steel components in marine environments. Cadmium has been used because of its hardness, close dimensional tolerance, and its ability to restrict hydrogen permeation into or out of steels. However, cadmium is highly toxic to occupational safety and harmful to the environment, thereby necessitating the search for alternative corrosion control coating systems.

Alternative plating/coatings to replace cadmium plating have been developed and evaluated for some period of time. In this paper, the environmental performance of the cadmium and zinc-nickel plating/coating systems on 4130 steel were evaluated and compared in water immersion, temperature cycling, rain, humidity, and salt fog testing.

Subject
Zinc nickel coatings, Humidity, Steel panels, Test methods, Primers, Zinc rich coatings, Steel surfaces, Plating, Coating adhesion, Steel, Zinc, Nickel, Blistering
Keywords:
cadmium replacement, zinc-nickel coating, zinc-nickel plating, zinc alloy electroplating, corrosion, marine corrosion, salt fog, environmental, blistering
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2003
GOV
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