Corrosion and Its Control Measures

May 1st, 2015
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Corrosion can be defined as the degradation of a material due to a reaction with its environment. Degradation implies deterioration of physical properties of the material. This can be a weakening of the material due to a loss of cross-sectional area, it can be the shattering of a metal due to hydrogen embrittlement, or it can be the cracking of a polymer due to sunlight exposure.

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Corrosion and Its Control MeasuresBy Priyadharshni1 CORROSION AND ITS CONTROLCORROSION* corrosion can be defined as thedegradationof amaterialdue to areactionwith its environment. * Degradation implies deterioration of physical properties of the material. This can be a weakening of the material due to a loss of cross-sectional area, it can be the shattering of a metal due to hydrogen embrittlement, or it can be the cracking of a polymer due to sunlight exposure. * Materialscan be metals, polymers (plastics, rubbers, etc.), ceramics (concrete, brick, etc.) or composites-mechanical mixtures of two or more materials with different properties. Because metals are the most used type of structural materials most of this web site will be devoted to the corrosion of metals. * Most corrosion of metals is electrochemical in nature.TYPES OF CORROSION* UNIFORM CORROSION* GALVANIC CORROSION* CONCENTRARION CELL CORROSION* PITTING CORROSION* CREVICE CORROSION* FILLI FORM CORROSION* INTERGRANULAR CORROSION* STRESS CORROSION CRACKIN* CORROSION FATIGUE* FRETTING CORROSION* EROSSION CORROSIONUniform Corrosion* This is also called general corrosion. The surface effect produced by most direct chemical attacks (e.g., as by an acid) is a uniform etching of the metal. On a polished surface, this type of corrosion is first seen as a general dulling of the surface and, if allowed to continue, the surface becomes rough and possibly frosted in appearance. The discolo

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