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Corrosion is in the process of oilfield development effect on oil well production and wellbore is very serious phenomenon, because of casing corrosion perforation caused by oil well perforation, pipeline corrosion, scrap production equipment for corrosion and frequent replacement, downhole rod pump etc. due to corrosion damage caused by operation to shorten the cycle, are huge the economic loss to the oil production. Corrosion is the essence of metal surface atomic ionization began, electrochemical corrosion in the electrolyte is more obvious, the ground of underground pipes used in the oilfield is in the electrolyte solution or liquid in the underground well, because the metal surface of primary battery caused by metal corrosion, is an obvious feature of oil corrosion. Especially in oil and water wells, due to the different materials used in metal, the electrochemical corrosion is especially obvious.