Chemistry:Cronak process
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Short description: Chromate conversion coating process
The Cronak process is a conventional chromate conversion coating process developed in 1933 by The New Jersey Zinc Company.[1] It involves immersing a zinc or zinc-plated article for 5 to 15 seconds in a chromate solution, typically prepared from sodium dichromate and sulfuric acid.[2] The process was patented in the United States on March 24, 1936 with USPTO number 2,035,380.[3]
References
- ↑ Gregory Zhang, Xiaoge (1996). Corrosion and Electrochemistry of Zinc. Springer Verlag Gmbh. pp. 16, 17. ISBN 978-1-4757-9877-7. https://books.google.com/books?id=Qmf4VsriAtMC. Retrieved 12 December 2014.
- ↑ "New Protective Zinc Coating Introduced". The Iron Age 137 (22): 94. May 28, 1936. https://archive.org/details/sim_chiltons-iron-age_1936-05-28_137_22. Retrieved 8 Mar 2023.
- ↑ Ernest John Wilhelm, "Method of coating zinc or cadmium base metals", US patent 2035380, published 1936-03-24, issued 1936-03-24, assigned to The New Jersey Zinc Company
External links
- https://web.archive.org/web/20141211093127/http://www.innovateus.net/science/what-zinc-chromate-used
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