Q: What are the different types of corrosion? A: The word corrosion comes from Latin and means to "gnaw or chew into little pieces." In metallurgy, it is the chemical or electro-chemical reaction between a material (usually a metal)and its environment that causes deterioration of the metal and its properties. Types of Corrosion: Uniform Pitting Crevice Galvanic (dissimilar materials in an electro-chemical cell) Erosion Corrosion (flowing corrodent) - Cavitation in corrodent - Fretting (mechanical motion) Inter granular (including exfoliation) De alloying (attack of one component in an alloy) Corrosion Assisted Cracking - Stress Corrosion (tensile stress) - Corrosion Fatigue (cyclic stress) Hydrogen Damage (embrittlement, blistering, etc.) Microbiologically Induced Corrosion (MIC)