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A benchmarking test for surface treatment products for zinc die cast
Author(s) -
Feser R.,
Schulz Ch.
Publication year - 2008
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200804172
Subject(s) - chromate conversion coating , zinc , corrosion , benchmarking , metallurgy , materials science , die (integrated circuit) , business , nanotechnology , marketing
Corrosion protection of zinc surfaces was successfully done in the past by chromate conversion layers. To reduce the amount of Cr(VI) products in the environment substitution processes have been developed. For the zinc industry it was a question whether surface treatment products are on the market which can substitute the conventional chromating process. A benchmarking test should be performed to show how good the Cr(VI) free products are in comparison to the state of the art process. Several corrosion tests have been performed to show the corrosion behaviour of treated zinc die cast products in comparison to Cr(VI) treated and plain surfaces. Additionally electrochemical measurements have been performed to discriminate further between the products. Especially CoulCount measurements show clearly the protection capability of the various surface treatments. No one of the tested products shows the same good behaviour like Cr(VI) treated products, but the performance of several products looks not bad and has to be proofed further under real service conditions.