Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Peeling of galvanized coating
2006
We galvanize very large finned coils (heat exchangers). After galvanising, forced air cooling is necessary to avoid peeling
(Kirkendal effect.)Due to the size and the heat content,the coils will remain very hot during a long time .
My question: is there also a relation with the zinc bath composition
(lead, aluminium,etc.) and the occurrence of peeling?
Manager Galvanizing plant - Amsterdam, Netherlands
2006
Sir:
The worst peeling of galvanized coating that I have seen was on re-phosphorized silicon-semi-killed steel. Perhaps checking the steel composition would show this. The peeled coating was quite brittle and would not bend without making a "snap" noise as it broke.
If the peeled coating is easily bent back and fourth without breaking then the pickling/fluxing step in the galvanizing would be suspect for problems.
Galvanizing Consultant - Hot Springs, South Dakota, USA
Please I need any information about peeling problem in galvanization process
Mohamed Reda Mohamed ZakiMinistry of Trade and Industry with cooperate with Unido - Cairo, Egypt
2007
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