STP917: Fundamental Corrosion Characterization of High-Strength Titanium Alloys

    Schutz, RW
    Supervisor of Corrosion Research and Development and corrosion research engineer, Titanium Metals Corporation of America, Henderson, NV

    Grauman, JS
    Supervisor of Corrosion Research and Development and corrosion research engineer, Titanium Metals Corporation of America, Henderson, NV

    Pages: 13    Published: Jan 1986


    Abstract

    Many commercially available and several developmental high-strength titanium alloys were evaluated for application in chloride-containing environments with respect to general, crevice, and stress corrosion resistance. Studies in boiling reducing and oxidizing acid chloride media permitted identification of certain high-strength titanium alloys, containing ≥ 4 weight % molybdenum, which are significantly more resistant than unalloyed titanium with respect to general and crevice attack. Data regression analysis suggests that molybdenum and vanadium impart a significant positive effect on alloy corrosion resistance under reducing acid chloride conditions, whereas aluminum is detrimental. Little effect of metallurgical condition (that is, annealed versus aged) on corrosion behavior of the higher molybdenum-containing alloys was noted. No obvious susceptibility to chloride and sulfide stress corrosion cracking (SCC) was detected utilizing U-bend specimens at 177°C.

    Keywords:

    titanium, titanium alloys, corrosion, high strength, ferric chloride, sodium chloride brine, hydrochloric acid, crevice corrosion, stress corrosion, titanium-molybdenum alloys, chlorides, sulfides


    Paper ID: STP18387S

    Committee/Subcommittee: B10.01

    DOI: 10.1520/STP18387S


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