Intergranular corrosion /ˌɪntərˈɡrænjʊlər kəˈroʊʒən/– corrosion that occurs along the grain boundaries of a metal (alloy). K.K. breaks the bond between particles, does not show signs of corrosion from the outside and causes deep corrosion from the inside.
Ex. Once exposed to intergranular corrosion, structures and materials in the mining industry are subject to destruction, which can lead to serious emergency situations.