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Intergranular Corrosion (Control (Alteration of environment, Low acidity…

- - - - Temp 815⁰C
        Carbide precipitation leads to the formation of chromium-depleted zone adjacent grain boundaries where it is less corrosion resistant.
        It also results in sensitized stainless steels
        
        Temp above 815⁰C
        Dissolution of carbide
  - - - If heated above 1230⁰C followed by rapid cooling, carbon atoms in the location next to the weld bead will remain in solid solution.
        
        If the material is reheated to critical temperature, localized sensitization is taking place in that place, therefore IGC can occur.
  - - - Low solubility of interstitials in ferrite resulting more rapidly material sensitizes at lower temperature.