Cronak process

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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

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  2. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  3. ^ US patent 2035380, Ernest John Wilhelm, "Method of coating zinc or cadmium base metals", published Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value)., issued Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value)., assigned to The New Jersey Zinc Company 
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