Download or read book Weldment Corrosion and Inhibitor in Carbon Dioxide Saturated Brine written by J. E. Dorgu and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inhibition of Weld Corrosion in Flowing Brines Containing Carbon Dioxide written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this research was to study the effectiveness of a typical oilfield corrosion inhibitor, which is considered to be a green inhibitor (non toxic to the environment) in controlling internal corrosion of welded X65 pipeline steel in brines saturated with carbon dioxide at one bar pressure, under dynamic flowing conditions, over a range of temperatures. Several experimental configurations were used ranging from a simple flat plate design to a novel rotating cylinder electrode, to allow high shear stress to be achieved. The rotating cylinder electrode (RCE) apparatus was designed to allow steel from the weld metal, heat affected zone (HAZ) and parent material to be galvanically coupled and tested in high shear stress conditions. In producing the RCE, the three regions of the weld were identified by optical metallography and samples of each were machined to produce cylindrical electrodes, which were mounted on a motor driven shaft. Electrical connections were made to the three electrodes via a high quality slip-ring assembly. The galvanic currents flowing between the regions of the weld were recorded using zero-resistance ammeters and their self-corrosion rates were found by uncoupling the electrodes and performing polarization resistance measurements. For static conditions the inhibitor had an effective performance and after a short initial period during which film formation took place, at longer exposure times a dramatic reduction of corrosion rate was obtained. Under flowing conditions, both the galvanic currents and the self-corrosion rates were found to increase with the shear stress, as the rotational speed of the RCE was increased. The total corrosion rate of each weld region was assessed from the sum of the self-corrosion and galvanic contributions. In most cases, the weld metal and HAZ were shown to be cathodic to the parent material and this was considered to be a desirable situation as localised corrosion of the weld was minimised. However, in some ci.

Download or read book Mechanism of Localized Corrosion of Carbon Steel Pipe in Corrosion inhibited CO2 saturated Brine written by Bryon Daniels Winget and published by . This book was released on 2008 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inhibition of Weld Corrosion in Flowing Brines Containing Carbon Dioxide written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this research was to study the effectiveness of a typical oilfield corrosion inhibitor, which is considered to be a green inhibitor (non toxic to the environment) in controlling internal corrosion of welded X65 pipeline steel in brines saturated with carbon dioxide at one bar pressure, under dynamic flowing conditions, over a range of temperatures. Several experimental configurations were used ranging from a simple flat plate design to a novel rotating cylinder electrode, to allow high shear stress to be achieved. The rotating cylinder electrode (RCE) apparatus was designed to allow steel from the weld metal, heat affected zone (HAZ) and parent material to be galvanically coupled and tested in high shear stress conditions. In producing the RCE, the three regions of the weld were identified by optical metallography and samples of each were machined to produce cylindrical electrodes, which were mounted on a motor driven shaft. Electrical connections were made to the three electrodes via a high quality slip-ring assembly. The galvanic currents flowing between the regions of the weld were recorded using zero-resistance ammeters and their self-corrosion rates were found by uncoupling the electrodes and performing polarization resistance measurements. For static conditions the inhibitor had an effective performance and after a short initial period during which film formation took place, at longer exposure times a dramatic reduction of corrosion rate was obtained. Under flowing conditions, both the galvanic currents and the self-corrosion rates were found to increase with the shear stress, as the rotational speed of the RCE was increased. The total corrosion rate of each weld region was assessed from the sum of the self-corrosion and galvanic contributions. In most cases, the weld metal and HAZ were shown to be cathodic to the parent material and this was considered to be a desirable situation as localised corrosion of the weld was minimised. However, in some ci.

Download or read book A Temperature Dependent Study of Fe Corrosion Inhibition in CO2 Saturated Brine written by Ai O and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Application of Surface Enhanced Raman Spectroscopy to the Study of CO2 Corrosion of Carbon Steel in Brines in the Presence of Organic Inhibitors written by Lucy Jane Oblonsky and published by . This book was released on 1995 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corrosion of Mild Steel in Carbon Dioxide Saturated Brine Using Jet Impingement Tests written by R. C. Woollam and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Corrosion Control and Materials in Oil and Gas Production written by P. S. Jackman and published by CRC Press. This book was released on 1999 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: These papers from two recent European Federation of Corrosion conferences, EURCORR '97 and EURCORR '98, deal with advances in the understanding of corrosion and performance of equipment in upstream oil and gas operations. The opening section includes two keynote papers on: the materials and corrosion view of wet gas transportation; and the modelling of low induced localised corrosion from critical hydrodynamic data and fracture mechanics data of CO2 corrosion scales. The further 45 papers cover carbon and low alloy steels, martensitic stainless steels, corrosion resistant alloys, galvanic corrosion, corrosion inhibitors and other materials.

Download or read book Green Inhibition of Mild Steel Corrosion in a Carbon Dioxide Saturated Saline Solution written by Elron Edgar Gomes and published by . This book was released on 2015 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Mild steel is extensively used in equipment such as pipelines and machinery by many industries, where it is exposed to corrosive environments. Dissolved carbon dioxide (CO2) can be found in produced water and results in severe corrosion due to the formation of carbonic acid. CO2 corrosion presents not only an economic loss but also an environmental and safety risk. Most industries use synthetic inhibitors, which are effective in reducing corrosion, but are also toxic and persistent. This has led to stricter regulations and thus, there is a need for alternative inhibitors which can replace them but not exhibit their undesired characteristics. The aqueous extracts of Fig leaves (FLE), Calotropis procera (CPLE) and Eggplant peels (EPPE) were investigated as novel corrosion inhibitors for mild steel in a CO2-saturated 3.5wt% NaCl solution using various electrochemical techniques such as linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS) and cyclic sweep (CS). The results showed that the corrosion rate is decreasing and inhibition efficiency is increasing as the concentration of inhibitor increased. Corrosion inhibition efficiencies of 90-95% were obtained using low dosage of the green inhibitors. FLE, CPLE and EPPE proved to be effective inhibitors and are compared to the performance of two commercially available inhibitors, A (green inhibitor) and B (synthetic inhibitor). Polarization studies show that FLE, CPLE and EPPE act as mixed inhibitors. The adsorption data was analyzed using various adsorption isotherm models and the results at temperatures of 25, 40, 50 and 70°C have shown that the adsorption behavior of FLE, CPLE and EPPE is best described by the Langmuir adsorption isotherm. The conclusion drawn from this work is that the FLE, CLE and ELE inhibitors proved to be effective inhibitors when compared to Inhibitor A. Inhibitor B proved to be a much more effective inhibitor than the others due to its synergistic mix of active ingredients."--Abstract.

Download or read book Mitigating Effects of an Oilfield Corrosion Inhibitor on Erosion corrosion of Carbon Steel in CO2 Saturated Flows with Sand written by Manav Tandon and published by . This book was released on 2005 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petroleum Abstracts written by and published by . This book was released on 1995-08 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies and Prevention of Carbon Steel Corrosion and Solvent Degradation During Amine Based CO2 Capture from Industrial Gas Streams written by Pathamaporn Wattanaphan and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Salt Concentration on Aqueous Strong Acid Carbon Dioxide and Hydrogen Sulfide Corrosion of Carbon Steel written by Fazlollah Madani Sani and published by . This book was released on 2021 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aqueous brines are often produced during hydrocarbon recovery from geological reservoirs as an unwanted by-product. Degree of salinity is always an issue in produced water. In the USA, salt concentration in waters produced from conventional oil and gas wells falls in the range of 1 g/l (~ 0.1 wt.%) to 400 g/l (~ 28 wt.%). Besides salts, CO2 and H2S are ubiquitous in the production stream. Dissolution of these gases in produced waters results in evolution of corrosive species, such as CO2(aq), H2S(aq), H2CO3(aq), H+(aq), HCO-3(aq), and HS-(aq) that cause severe corrosion problems for carbon steel; primary material used in the construction of oil and gas pipelines. Combination of aqueous salts with dissolved CO2(aq) and H2S(aq) and their related species, has always been a great concern for pipeline operators in terms of corrosion problems. A large body of research exists on CO2 and H2S corrosion of oil and gas facilities, mostly at low salt concentrations; up to 3 wt.%. However, only a limited number of studies has investigated CO2 corrosion at high salt concentrations and to the best of this author’s knowledge, this number is zero for H2S corrosion. In the present study, the effect of salt (NaCl) concentration on aqueous uniform strong acid, CO2, and H2S corrosion of carbon steel is investigated. The key parameters in the corrosion process that are influenced by salt concentration are identified: transport phenomena (solution density, solution viscosity and diffusion coefficients of dissolved species), solution chemistry, and electrochemistry of the underlying reactions. Models have been reproduced and developed to account for the effect of salinity (up to ~ 5 m NaCl) on transport phenomena and solution chemistry. The Smolyakov and the square root (Kohlrausch law) equations were chosen for correcting the diffusion coefficients for the effect of temperature, and salt concentration, respectively, using new coefficients obtained in this study. The mixed solvent electrolyte (MSE) model, which is the only comprehensive solution chemistry model available in the literature for the H2O-NaCl-CO2-H2S systems is reproduced. The MSE model is used to calculate the equilibrium activity and activity coefficients of dissolved species important in aqueous strong acids, CO2, and H2S corrosion of carbon steel. pH measurements at 1 bar total pressure and temperatures below 80oC showed that the autogenous pH of aqueous CO2- and H2S-saturated solutions decreased with increasing NaCl concentration. The reason for the decrease in the solution pH was attributed to the increase in the activity coefficient of the H+ ion. The effect of salt concentration on electrochemistry and rate of strong acid, CO2, and H2S corrosion was studied by performing eight sets of experiments in aqueous N2-, CO2-, and H2S-satuared solutions at temperatures below 80oC, 1 bar total pressure, solution pH values between 3 to 5, and different NaCl concentrations, ranging from 0.1 wt.% (0.017 m) to 20 wt.% (4.27 m). The weight loss and linear polarization resistance corrosion rate measurements showed that the corrosion rate for all three types of corrosion generally decreased with increasing NaCl concentration. The analysis of potentiodynamic polarization sweeps indicated that increasing NaCl concentration decreased the rate of the cathodic H+ ion reduction reaction continually, while the rate of the cathodic water reduction reaction was mostly increased. The rate of anodic dissolution of iron in the active region increased at lower NaCl concentrations and then switched trend and decreased at higher NaCl concentrations. In strong acid corrosion, salt concentration seemed to have no effect on the mechanism of active dissolution of iron.

Download or read book Proceedings of the CORROSION 83 Symposium on CO2 Corrosion in the Oil and Gas Industry written by R. H. Hausler and published by . This book was released on 1984 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Cost of Corrosion in China written by Baorong Hou and published by Springer Nature. This book was released on 2019-09-26 with total page 953 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively covers corrosion and corrosion protection in China in the areas including infrastructure, transportation, energy, water environment, as well as manufacturing and public utilities. Furthermore, it presents a major consulting project of Chinese Academy of Engineering, which was the largest corrosion investigation project in Chinese history, including the corresponding methods, processes and corrosion protection strategies, and provides valuable information for numerous industries. Sharing essential insights into corrosion prediction and decision-making, this book will help to decrease costs and extend the service life of equipment and facilities; accordingly, it will benefit scientists and engineers working on corrosion research and protection, as well as economists and government employees.

Download or read book Petroleum Engineer for Management written by and published by . This book was released on 1958 with total page 1678 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petroleum Abstracts Literature and Patents written by and published by . This book was released on 1989 with total page 1528 pages. Available in PDF, EPUB and Kindle. Book excerpt: