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Unformatted text preview: MECH 210 081208 Corrosion Corrosion : Deterioration of material as a result of chemical reaction with its environment Electrochemical corrosion : The deterioration of material as a result of chemical reaction involving exchange of electrons. It is also known as galvanic corrosion since it is the preferential corrosion of the more chemically active of two metals that are electrically coupled and exposed to an electrolyte. Electrochemical cell ( galvanic cell ): Two dissimilar metals in electrical contact with an electrolyte. Electrode potential : Related the tendency of a material to corrode. The potential is measured as the voltage between the material and a standard electrode. Electromotive force ( emf ) series : A ranking of metallic elements according to their standard electrochemical cell potentials (electrode potentials). Anode : The electrode in an electrochemical cell (or galvanic couple) that experiences oxidation, or gives up electrons. Cathode : The electrode in an electrochemical cell (or galvanic couple) at which a reduction reaction occurs; thus the electrode that receives electrons from an external circuit....
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- Fall '08