Chloride-based deposits can significantly accelerate the progress of elevated temperature degradation of stainless steels and nickel-base alloys. Such deposits are present in the byproducts of combustion of alternative fuels and are common in the environment experienced by hot automotive exhaust components. A test was developed to investigate the susceptibility of materials to attack under chloride salt deposits at elevated temperatures, using a sample incorporating stressed, unstressed, and welded segments. Both gravimetric and metal recession measurements were used to determine the progression of corrosion. Nickel-base alloys were found to be resistant to deposit-assisted attack, while common stainless steels were prone to scaling and exfoliation. Results will also be presented on recently developed higher-alloy content stainless steels which exhibit corrosion resistance similar to that of the nickel-base superalloys, and on lean austenitic stainless alloys intended as replacements for traditional austenitic stainless steels.


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    Titel :

    Deposit-assisted corrosion of heat-resistant alloys


    Beteiligte:


    Erscheinungsdatum :

    2009


    Format / Umfang :

    20 Seiten, 15 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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