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Peculiarities of the Corrosion Protection of Steel Underground Pipelines |
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15.12.2008 г. |
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Peculiarities of the Corrosion Protection of Steel Underground Pipelines N. P. Glazov Scientific-Research Institute on Construction and Operation of Heat-power Objects Ltd VNIIST,
Okruzhnoi pr. 19, Moscow, 105187 Russia e-mail: cpkz@ mail.ru Received March 1, 2004 Abstract — The topics of enhancing the corrosion protection efficiency of pipelines are examined. Improuving the quality of the protective coatings enables one to preclude corrosion under the disbonded insulation, as well as the stress corrosion cracking, but causes the increase in the stray-current corrosion and other undesirable effects that are easily removed with the aid of electrochemical protection. Checking the insulation of pipelines upon completed construction by cathodic polarization ensures the reproducibility of the design parameters of the cathodic protection. The topics of the influence of insulating components, as well as protective and anodic groundings, on the effectiveness of corrosion protection are considered.
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