An electrochemical study of the delamination of polymer coatings on galvanized

仪器资料 · 发表于 2018-5-2 21:37:42

An electrochemical study of the delamination of polymer coatings on galvanized steel
The relationship between the rate of polymer delamination and the intensity of either anodic
or cathodic current under the paint has been investigated for the zinc/surface treatment/
polymer system by using a special electrochemical cell. Three types of surface treatment were
investigated: simple alkaline degreasing, trication phosphating, and a chromate free conversion
coating. Significant differences were observed for the three substrates. The alkaline
resistance of the conversion coatings was determined using an ICP atomic emission spectroelectrochemical
method. The results are interpreted in terms of the differing chemical stability
of the conversion layers towards hydroxide generated by oxygen reduction.

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