Editing Anodizing (section)

===Zinc===
[[Zinc]] is rarely anodized, but a process was developed by the [[International Lead Zinc Research Organization]] and covered by MIL-A-81801.<ref name="Edwards2"/> A solution of [[ammonium phosphate]], [[Monochromate|chromate]] and [[fluoride]] with voltages of up to 200 V can produce olive green coatings up to 80 μm thick.<ref name="Edwards2"/> The coatings are hard and corrosion resistant.

Zinc or [[galvanized steel]] can be anodized using DC at lower voltages (20–30 V) in silicate baths containing varying concentrations of [[sodium silicate]], [[sodium hydroxide]], [[borax]], [[sodium nitrite]], and [[Nickel(II) sulfate|nickel sulfate]].<ref>Imam, M. A., Moniruzzaman, M., & Mamun, M. A. ANODIZING OF ZINC FOR IMPROVED SURFACE PROPERTIES. Proceedings of a meeting held 20–24 November 2011, 18th International Corrosion Congress, Perth, Australia, pp.&nbsp;199–206 (2012), {{ISBN|9781618393630}}</ref>