The aim of this research was to investigate the influence of metallurgy on the corrosion behaviour of separate weld zone (WZ) and parent plate (PP) regions of X65 pipeline steel in a solution of deionised water saturated with CO2, at two different temperatures (55 °C and 80 °C) and at initial pH~4.0. In addition, a non-electrochemical immersion experiment was also performed at 80 °C in CO2, on ...

Oil and Gas pipelines are protected by various types of external coatings in conjunction with CP systems. Polyethylene is commonly used as the top coat in two or three layer systems. The existing two layer system found in the North American and Australian markets uses an adhesive that is mastic-based. It provides excellent corrosion resistant properties and has relatively low shear resistance i...

Water distribution networks comprised of underground reinforced concrete pipes deteriorate with time due to environmental conditions, such as chloride-induced corrosion and differential soil movements [1]. If the pipes in these networks are not periodically replaced, they will eventually fail. Strategies for replacement for these pipes depend on 1) the risks associated with failure of a water d...

INTRODUCTION During the last three years my interest in the use of ultrasonics for the detection of corrosion and the measurement of remaining wall thickness has been re-awakened. The method has been extensively used to verify and quantify Magnetic Flux Leakage (MFL) results. Discrepancies between ultrasonic and MFL results have usually been put down to "Another MFL false call." However, having...

For help in preparation of this article, thanks to Dylan Davies, Schlumberger Cambridge Research, Ahmad Madjidi, Schlumberger GeoQuest, Abu Dhabi, UAE; Nabil Mazzawi, Schlumberger Wireline & Testing, Tripoli, Libya; Perry Nice, Statoil, Stavanger, Norway; Barry Nicholson, Schlumberger Wireline & Testing, Jakarta, Indonesia; Daniel Roche, Elf, Bergen, Norway; Philippe Rutman and Derek Stark, Sch...

For help in preparation of this article, thanks to Dylan Davies, Schlumberger Cambridge Research, Ahmad Madjidi, Schlumberger GeoQuest, Abu Dhabi, UAE; Nabil Mazzawi, Schlumberger Wireline & Testing, Tripoli, Libya; Perry Nice, Statoil, Stavanger, Norway; Barry Nicholson, Schlumberger Wireline & Testing, Jakarta, Indonesia; Daniel Roche, Elf, Bergen, Norway; Philippe Rutman and Derek Stark, Sch...

The influence of magnesium anode dissolution in pipe filled with potable water on the steel corrosion rate was investigated. Steel measured using weight loss technique, and linear polarization resistance measurements were used to estimate formation kinetics protective abilities phase layer metal surface. cathodic current distribution along a microammeter compared computer model. results clearly...

This research studies the effect of normalization on ductility and corrosion resistance API 5L X65 pipe. Normalization conducted at a temperature 900 °C with holding time 30, 60, 90, 120, 150 minutes, followed by cooling down to room using an external air. Corrosion testing normalized specimens was performed seawater as corrosive environment, -and were also tested for microhardness determine th...

Abstract Failure caused by stress corrosion cracking (SCC) is inevitable during the long-term service of nuclear power pipe welds. This mainly due to propagation microcracks in deposited metal, which seriously affects operation safety pressure pipes. Overlay welding practical for repair welding, can introduce compressive residual inside weld seam. In this work, a diagonal T-pipe joint was fabri...

This work studies a series of factors influencing erosion-corrosion in oilfield gathering pipelines steel using the home-made testing pipe flow loop. Results showed that was corroded oil-water flow. The corrosion rate increased with velocity on whole, and addition solid particles would intensify localized corrosion. For test added 2 wt% quartz sand at m/s, portion pure erosion accounted for 47....