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Intergranular Corrosion

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  • Grain Boundary Engineering for Improved Resistance to Intergranular Degradation (.pdf)
    Intergranular degradation processes such as intergranular-cracking, -corrosion, and -creep cavitation have plagued numerous plant components in the nuclear, oil and gas, transportation, chemical and food processing industries. The occurrence of these degradation processes often leads to costly
  • "Brick Wall" Helps Explain How Corrosion Spreads Through Alloy
    better understand this kind of corrosion, and also explain corrosion in other types of alloys. Although the alloy, called 2024-T3, is strong and resistant to corrosion in general, it is vulnerable to intergranular corrosion -- when tiny pits on the surface grow into crack-like fissures that
  • Characterization of Tensile Residual Stresses in 7050-T7651 Aluminum Friction Stir Welds (.pdf)
    Salt spray corrosion pits are a common site of fatigue crack initiation in aluminum alloy aircraft components. Salt corrosion pitting occurs during exposure to the marine atmosphere and results in intergranular corrosion to a depth dependent on the time of exposure, temperature, and the service
  • The Use Of Engineered Compressive Residual Stresses To Mitigate Stress Corrosion Cracking And Fatigue Failure In 300m Landing Gear Steel (.pdf)
    salt-water SCC was eliminated entirely by LPB treatment. Shot peened 300M failed in just a few hours under static loading in salt water. LPB treated samples exhibited only general corrosion and survived 1500 hrs. at the same stress without failing. Pitting and intergranular surface corrosion result
  • Embrittlement of Ancient Silver (.pdf)
    . basic types of embrittlement, corrosion-induced (which appears in several forms), microstructurally-. induced, and synergistic combination of the two. Corrosion-Induced. Intergranular corrosion (see figure 2a) is the most common form, since it occurs in mechanically worked. and annealed objects, which
  • Reactive Metals for Specialized Industrial Applications (.pdf)
    in the formation. of brittle hydrides and eventual failure due to cracking. Intergranular corrosion is also a from of. electrochemical attack, but occurs and progresses preferentially along the grain boundaries usually. because the grain boundary regions contain material that is anodic to the central
  • Failure of a Stainless Steel Holding Tank (.pdf)
    ) of the tank displays a macroscopic web-like network of cracks that deceptively suggest intergranular stress corrosion cracking (IGSCC). Low applied stresses and fabrication-induced residual stresses are tensile on the outside diameter (OD) and compressive on the ID, and this resulted in numerous cracks
  • Passivation and the Passive Layer
    refer to as chelating agents work in aqueous solutions (such as Citric acid mixtures) to "enhance solubility of scales and. certain other contaminants that even mineral acids do not dissolve." When properly applied, inter-granular attack, pitting,. and other forms of corrosion are eliminated. new

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