[PDF] Top 20 Corrosion Behavior of X65 and X80 Pipeline Steels under AC Interference Condition in High pH Solution

... of AC on the passive films formed on the surface of the two steels, the Mott-Schottky curve was ...at AC current density of 100A/m 2 for ...imposed AC circuit. Sequentially, AC current ... See full document

... applied AC signal were ...of AC interference, the accelerated anodic reaction results in an increasing anodic current ...of AC interference, the anodic reaction is hindered and the ... See full document

... marine pipeline steels in flowing environment is a major issue, which results in a great degradation of metal surface and a large damage of the oil and gas transportation system in seawater ...flowing ... See full document

... crevice corrosion of pipeline steel under disbonded coating in soil environment has been investigated by various electrochemical measurement techniques and computational simulation[5, 6, 8-10, ... See full document

... of X80 steel under different stress conditions is processed to obtain the relationships curve of OCP with stress changes in ...the corrosion resistance of the X80 pipeline steel and ... See full document

... localized corrosion of carbon steel [1]. Pitting corrosion has often been observed on pipeline steels due to AC interference ...that AC could play a similar role to ... See full document

... Abstract— Corrosion has become an increasingly significant design consideration when components and equipments are exposed to marine ...affecting corrosion are pH value, NaCl concentration of sea ... See full document

... soil solution, the corrosion rate of X80 steel presented a similar regular ...minor corrosion pits appeared on the surface, and the corrosion phenomenon was not obvious [9, ...soil ... See full document

... of corrosion due to stray current and have achieved some success ...DC interference has a significant influence on the corrosion of buried steel pipelines, and its essence is the electrolytic effect ... See full document

... the pipeline flows may encounter a mildly-alkaline corrosion environment, especially after excessive inhibitor injection, in which bicarbonate exists with high concentrations and acts as a major ... See full document

... The stress cracking corrosion susceptibility of X80 pipeline steel in simulated soil solution with various pH was studied using SSRT method. Tests were obtained on flat tensile ... See full document

... on AC or DC stray current corrosion is based on the buried pipeline steel under pressure, whereas the factors affecting the corrosion process are studied ...the corrosion of ... See full document

... of X65, X80 and X100 pipeline steel in Dagang soil solutions, EIS measurements have been performed at various cathodic polarization potentials (from -1200 mV SCE to -500 mV SCE), as shown in ...the ... See full document

... in corrosion behavior is attributed to the differences in the chemical composition of the material ...Metal corrosion often occurs along the boundaries of the alloy grains and their adjacent areas, ... See full document

... above corrosion morphologies ...of X80 steel at various AC current densities following the removal of corrosion ...micro- corrosion morphologies of steel samples tested with or without ... See full document

... metal corrosion process[17], it is based on the extrapolation of the Tafel curve, which requires that at least one of the anodic or cathodic branches exhibits a Tafelian behavior in the strong polarization ... See full document

... of corrosion resistance between these two phases, which is in good agreement to the present findings shown in ...pitting corrosion resistance between these two phases in tested super duplex stainless ... See full document

... the corrosion morphologies of CGHAZ-1 present river-like shape and some pitting holes can be ...pitting corrosion of CGHAZ-4 is not seriously which is shown in ... See full document

... The corrosion of pipelines, which depends on the internal and external environments, is difficult to predict and control [11, 12], especially in the welded ...the corrosion behavior of the ...the ... See full document

... researching corrosion process, the technology has been widely used to investigate the corrosion mechanism and has been proven to be ...of pipeline steel under strong solution [7, ... See full document