Molybdate based passivation of zinc

Peter Torben Tang, Gregers Bech-Nielsen, Per Møller

    Research output: Contribution to journalConference articleResearchpeer-review


    In order to reduce corrosion rates, zinc plated parts are usually chromated. Recently chromates have caused increasingly environmental concern, for both allergic effects among workers touching chro-mated parts and toxic effects on fish, plants and bacteria. A molybdate based alternative has been developed to replace chromates in several passivation applica-tions. Depending on the environment in which the passivated parts are to be exposed, the protection that this alternative treatment provides range from less efficient to more efficient as compared to chromate. These aspects as well as issues such as; cost, stability, layer composition and test results from several different corrosion tests will be discussed.
    Original languageEnglish
    JournalTransactions of the Institute of Metal Finishing
    Issue numberPart 4
    Pages (from-to)144-148
    Publication statusPublished - 1997
    EventInterfinish 96 world congress - Birmingham, United Kingdom
    Duration: 10 Sept 199612 Sept 1996


    ConferenceInterfinish 96 world congress
    Country/TerritoryUnited Kingdom


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