Corrosion Behaviour of High-Chromium White Iron Hardfacing Alloys in an Alkaline Solution

Krishnan Kannoorpatti, Varmaa Marimuthu

    Research output: Contribution to journalArticle

    Abstract

    Hardfacing alloys of high-chromium white irons (HCWI) deposited using welding are well known for their wear resistance. These materials are applied in conditions needing not only wear resistance but also corrosion. In this
    study, the HCWI alloys were exposed to alkaline solutions of pH 14. Anodic polarization technique was used to study the corrosion behaviour. The experimental results found that corrosion occurs on carbides in preference to the matrix. Pourbaix diagrams of carbides were found to be very useful in explaining the corrosion behaviour of the hardfacing alloys. The significance of carbide corrosion to the use of hardfacing alloys is discussed. Possible methods to mitigate corrosion are proposed.
    Original languageEnglish
    Pages (from-to)1-14
    Number of pages14
    Journaljournal of bio- and tribo-corrosion
    Volume2
    Issue number4
    DOIs
    Publication statusPublished - Dec 2016

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