Assessment by finite element modelling of the mechano-electrochemical interaction at double-ellipsoidal corrosion defect with varied inclinations on pipelines

Corrosion behavior and mechanism of X80 steel in silty soil under the combined effect of salt and temperature

“…4(b)). 24,38,39 The unstable compound FeOCl further decomposes into hydroxide anion, ferri ion, and chloride ion (eqn (10)). The presence of trivalent iron and chloride ions accelerates the corrosion process, causes corrosion under the passivation lm on the metal surface, and leads to the increase in the occurrence of pitting corrosion.…”

“…[6][7][8] The failure that occurs during the service life of pipelines can be broadly divided into the following three categories: excavation damage, material defects, and corrosion effects. [9][10][11][12] Inhomogeneous and porous soil cause relatively complex corrosion of buried pipeline steel, based on the interaction of multiple simultaneous reactions. As a result, the direct contact between the steel surface and the erosive soil environment is regarded as a signicant cause of its corrosion failure.…”

Effect of external wall defect growth on internal wall corrosion of oil pipelines under mechano‐electrochemical interaction

“…[1,2] For both marine and buried pipelines, their internal and external walls could be corroded. [3][4][5][6][7][8][9][10][11] Acidic red soil, a typical soil in southeastern China, is characterized by the high content of clay minerals, high bond degree of texture, and high resistivity. [12,13] Its pH value is usually between 3 and 6.…”