System for testing stray current corrosion of buried steel pipeline under function of tensile stress

Abstract

The invention discloses a system for testing stray current corrosion of a buried steel pipeline under the function of a tensile stress, belonging to the field of corrosion and protection of materials. The system comprises a stress loading experiment system, a soil environment simulating system, a stray current simulating system, a cathodic protection system and an electrochemical testing system. The stress loading experiment system generates a pressure required by a sample experiment; the soil environment simulating system simulates a soil environment in which a buried metal is, and soil solutions with different powers of hydrogen and conductivities are provided; the stray current simulating system generates a direct current, an alternating current and an alternating-current and direct-current mixed stray current; the cathodic protection system provides a cathodic protection potential for the sample; and the electrochemical testing system tests corrosion potentials of the sample under different influence factors. The system is capable of measuring weightlessness, obtaining corrosion morphology, generating the direct current, the alternating current and the alternating-current and direct-current mixed stray current, providing the stress required by the experiment according to the actual running condition, simulating the cathodic protection, and carrying out corrosion rule experiments under different influence factors.

Description

technical field

[0001] The invention belongs to the field of material corrosion and protection, and in particular relates to a stray current corrosion test system for buried steel pipelines under the action of tensile stress. Background technique

[0002] As my country's buried pipeline network becomes more and more complex, steel pipelines in the pipeline network will cause more and more corrosion problems under the action of factors such as stray current and stress, and the damage will become more and more serious. Therefore, research on buried steel pipelines The law of stray current corrosion is very urgent under stress conditions. Since the stray current is affected by many factors such as soil conductivity and buried depth, and it is difficult to conduct field experiments in the special environment, it is very necessary to establish a stray current corrosion test system for buried steel pipelines under stress conditions. At present, there is a single tensile stress tes...

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