... coating sol-gel coating geothermal martensitic steel To apply the alumina coating on the substrate, the specimens were dipped into the boehmite-sol for 20 s and withdrawn with a speed of 170 mm/min to produce a homogeneous film on the surface. The specimens were then dried in an oven at 120 °C for 5...

... conditions (stress, plastic strain, hydrogen flux and concentration) to the intensity of the applied cathodic polarization. hydrogen-assisted cracking martensitic steel quasi-cleavage hydrogen flux INTRODUCTION The present work addressed the challenge of developing higher-strength low-alloy martensitic...

...The depletion of easily exploitable oil and gas resources increases the demand for martensitic steels able to withstand the high pressures of deeper offshore exploitation. These steels also need to resist to hydrogen stress cracking (HSC) in sour environment. In order to develop high-strength OCTG...

... of condensate as drops on the surface of carbon steels (X52, X70), martensitic steel UNS S41500, and superaustenite UNS N08031 in CO₂ atmosphere with impurities at 278 K (to simulate the transportation condition in a buried pipeline). Exposure tests were performed at both normal pressure and high...

... environment. On the other hand the ductility of the 10% expanded specimens showed a dramatic loss in ductility. Stress Corrosion Cracking CO₂ corrosion API 5CT steel Cold-work Martensitic steel INTRODUCTION Corrosion in the oil and gas industry presents itself in several forms, depending...

... corrosive environment for martensitic steels used in oil and gas wells, such as 1%Cr low alloy steel, 13%Cr martensitic stainless steel and Super 13%Cr martensitic stainless steel. Electrochemical tests were carried out in static conditions to verify the behavior of martensitic steels in completion fluid...

... corrosion API 5CT steel Cold-work Ferritic-pearlitic steel Martensitic steel INTRODUCTION CO₂ Corrosion Mechanism It is well known that the corrosion rate is controlled by the solid corrosion product layer that forms on the surface of a metal during the corrosion process, at the same time...

...%Cr steel. This includes the following examinations: sweet corrosion CO₂ corrosion sulfide stress corrosion cracking (SSC) stress corrosion cracking (SCC) Cr bearing steel oil country tubular goods (OCTG) martensitic steel INTRODUCTION The CO₂ corrosion of steels, known...

... than that of 3CR steel test specimens. CO₂ corrosion Localized corrosion General corrosion Cr bearing steel Oil country tubular goods (OCTG) Ferritic-pearlitic steel Martensitic steel INTRODUCTION The CO₂ corrosion of C-Mn and low Cr bearing steels, known as “Sweet...

... was confirmed in that steel. The developed-5Cr alloyed steel has been successfully used in Siri Field that is Oil & Gas Field located in the Danish Sector of the North Sea. CO₂ corrosion Cr bearing steel Oil country tubular goods(OCTG) Ferritic-pearlitic steel Martensitic steel INTRODUCTION...

...-pearlitic steel Martensitic steel INTRODUCTION In the case of 9 and 13% Cr steels as shown in Figure 4 , the T_max. was observed in the CO₂ environment, but did not in that with 0.5% CH₃COOH. Namely, the corrosion rate in the CO₂ environment with 0.5...

.../y is taken as an acceptable corrosion rate, 13Cr steel could be applied up to 125 °C in the presence of 150 g/L Cl^-. In the exposure tests, the API 5CT 13Cr steel did not show pitting at the 0.1 mm/y boundary but the higher carbon grade did suffer from this form of attack. martensitic...

... products. Concerning microstructure, Steel J55 with ferritic-pearlitic microstructure showed good corrosion resistance for localized-corrosion compared with Steel N80 and L80 with martensitic microstructure. Martensitic steel Ferritic-pearlitic steel Mesa corrosion Ringworm corrosion Carbon dioxide...