Cronak process

The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

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. Retrieved 12 December 2014.
^ "New Protective Zinc Coating Introduced". The Iron Age. Vol. 137, no. 22. May 28, 1936. p. 94. Retrieved 8 Mar 2023 – via Internet Archive.
^ US patent 2035380, Ernest John Wilhelm, "Method of coating zinc or cadmium base metals", 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

[1] Gregory Zhang, Xiaoge (1996). Corrosion and Electrochemistry of Zinc. Springer Verlag Gmbh. pp. 16, 17. ISBN 978-1-4757-9877-7. Retrieved 12 December 2014.

[2] "New Protective Zinc Coating Introduced". The Iron Age. Vol. 137, no. 22. May 28, 1936. p. 94. Retrieved 8 Mar 2023 – via Internet Archive.

[3] US patent 2035380, Ernest John Wilhelm, "Method of coating zinc or cadmium base metals", published 1936-03-24, issued 1936-03-24, assigned to The New Jersey Zinc Company

[1]

[2]

[3]