Cathodic protection is an effective method for safeguarding underground pipelines against soil corrosion and stray current-induced corrosion.
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Corrosion protection
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The high corrosion activity of groundwater and the extracted products of wells containing aggressive components (hydrogen sulfide, salts, etc.) is the cause of the corrosion destruction of the casing.
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Protection is provided by galvanic anodes (protectors) made of metal or alloy with a lower electrode potential compared to steel, the contact of which with the surface of the tank shifts the potential of the latter to the negative side, which suppresses corrosion.
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Pipeline protection is used to protect pipelines of relatively small length, with external insulation and without electrical contacts with other structures.
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The protective protection of the VST bottom from ground corrosion is carried out using tread groups evenly spaced around a circle with a radius of 3 to 5 m greater than the radius of the VST.
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Comprehensive protection includes inhibitory protection of the roof, upper belts of the tank wall in the gas-vapor space, cathodic protection of the bottom and lower belts of the VST.
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The protective protection is carried out regardless of the presence and quality of the internal anti-corrosion dielectric coating of the bullets.
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A wide range of services in the field of improving the reliability of oilfield equipment. Installation, commissioning, and operation of electrochemical equipment protection against corrosion.