in this work, electrochemical methods such as tafel polarization and electrochemical impedance spectroscopy (eis) were used to study the inhibition efficiency of nettle leaves hydroalcoholic extract as a green corrosion inhibitor of api 5l carbon steel in 0.5 m h2so4 solution. the results showed that the inhibition efficiency was increased with increasing the concentration of the extract and th...

Limited studies have been conducted on the effect of a magnetic field corrosion behavior steels. Investigating pipeline material in oil and gas industries will be beneficial regarding prediction control. In this work, process API 5L X65 carbon steel was investigated well-developed flow loop using potentiodynamic polarization curves electrochemical impedance spectroscopy (EIS). Using permanent m...

The process of thermo-mechanically controlled rolling in the conditions Steckel mill Ferriera Valsider plant was developed for first time hot-rolled coils sizes 12 mm × 1510 from steel X65 grade further production electric welded pipes according to API-5L standard. provides carrying out roughing-rolling two stages facilitating forming a smaller austenite grain and therefore more dispersed homog...

Assessment of a corroded pipe is crucial to determine when it must be repaired or replaced. However, the conventional corrosion assessment codes for failure pressure predictions pipes with circumferentially aligned interacting defects are conservative (underestimations more than 40%), resulting in premature repair replacements pipelines. Alternatively, numerical approaches may used, but they ti...

The corrosion behaviors of different weld heat-affected zones (HAZs) were investigated, comprising an API 5L X65 steel immersed in seawater with abundant native microbial community. Before tests, HAZ physical simulations performed at the peak temperatures 700 °C, 860 1000 and 1350 °C. Throughout 14 days immersion, various planktonic bacterial groups associated microbiologically influenced metab...

The world's oil and gas sectors are diverse. They utilize offshore pipes to generate millions of barrels meet global energy demands. In this study we identified the critical buckling load that occurred on a cylinder shell (also known as radial buckling). Offshore pipe design must several criteria, one which is requirement for withstand external hydrostatic pressure seawater. overall calculated ...