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    Intergranular Corrosion in Iron and Nickel Base Alloys

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    Intergranular corrosion in stainless steels (austenitic, ferritic, and two phase) and nickel base corrosion resistant alloys (nickel-chromium-iron, nickel-chromium-molybdenum, and nickel-molybdenum) is reviewed. Practical aspects discussed include thermal treatments producing susceptibility, media that cause attack, influence of alloy composition, and prevention methods. The currently most plausible mechanisms are also outlined. Test methods, particularly the standard methods for quality control, are dealt with as well as techniques used to simulate the thermal effects of welding. The relationships between intergranular attack and other forms of localized corrosion are noted.


    corrosion, intergranular corrosion, stainless steels, nickel alloys, tests, evaluation, grain boundaries, precipitation (chemistry), stress-corrosion cracking, pitting

    Author Information:

    Henthorne, M
    Supervisor, Carpenter Technology Corp., Reading, Pa.

    Committee/Subcommittee: G01.06

    DOI: 10.1520/STP35416S