x65 steel eds data

Impedance distribution at the interface of the API steel X65 in marine environment SEM image of corrosion products of the API X65 steel/natural seawater system. (b) EDS analysis corresponding to regions i and ii in the SEM image. The preliminary approximation for experimental data from theoretical impedance results at initial time was

Oil and gas industry is constantly facing challenges in prospecting and transport, dealing with the corrosion and degradation of the pipelines. This work presents an electrochemical evaluation of API X65 steel exposed to CO 2 /thiosulfate (10 3 mol/l) aqueous deaerated medium. Sweet and sour corrosion were studied simultaneously.

Effect of Cr Content on the Electrochemical Behavior of Low chromium X65 Steel in CO on the electrochemical behavior of low Cr steel that is important for revealing the role of Cr and the

Fig. 5 a Bright eld image of cross section at corrosion front of X65 low carbon steel, b EDS line scan proles alone the dashed line in a, Thermochemical Data of Pure Substances, 3rd edn.

SEM, EDS, Optical Microscopy, Profilometry RESULTS AND DISCUSSION In order to determine the critical shear stress for iron carbonate removal, this research followed the methodology described by Bull, et al.12, therefore, the following steps were followed for the overall assessment of the adherence of an iron carbonate layer on the X65 steel1.

species found on the steel surface and confirmed that the presence of acetic acid, partially removes the FeCO 3 layer. However, the protection is not affected as FeCO 3 appears to remain on the surface as a thin surface layer of intergrown nanocrystals . Key wordsIron carbonate, X65 steel, acetic acid, SEM, EDS, FIB/TEM/ED, XRD and XPS

Mar 01, 2013 · Corrosion Behavior of API 5L X65 Carbon Steel Under Supercritical and Liquid Carbon Dioxide Phases in the Presence of Water and Sulfur Dioxide. energy dispersive spectroscopy [EDS], and infinite focus microscopy [IFM]). Effect of temperature on the critical water content for general and localised corrosion of X65 carbon steel in the

Localized CO2 Corrosion in the Presence of Organic Acids . A thesis presented to . the faculty of . the Russ College of Engineering and Technology of Ohio University . In partial fulfillment . of the requirements for the degree

ABSTRACTThe pulsed gas tungsten arc welding with hot wire was used to clad Inconel 625 on the surface of X65 steel. The influences of welding current in horizontal welding position on the dilution, in further the composition, microstructure, and property of the Inconel 625/X65 cladding interface were investigated. Experimental results show that with the increase in welding current, namely, in

Analysis of non metal inclusions in steel using EPMA Anorthite in silicate matrix Aspex images of MnS, alumina, and CA inclusions in steel Automated SEM/EDX analysis of NMI in steel Automated non metallic inclusion analysis in the three plants Automatic analysis of non metallic inclusions in steel using SEM EDS

X65 carbon steel CO2 corrosion in the presence of small amounts of H2S but the sulfide film detected on the electrode surface (using EDS)14 had inhibited the corrosion rate by a coverage effect. It was unnecessary to use equivalent circuit to analyze the impedance data because all the data

API 5L Seamless Line Pipe available in all special steel grades like X42 Pipe/X46 Pipe/X52 Pipe/X56 Pipe/X60 Pipe/X65 pipe/X70 pipe/X80 pipe in PSL 1 & PSL 2. Grades covered by this specification are A25, A, B (and the following "X" Grades), X42, X46, X52, X56, X60, X65, X70, X80.

Cylindrical samples of X65 pipeline steel were manufactured to fit onto the end of a steel rod sealed with a plastic gasket, rubber O ring, and a glass rod. The samples had a total exposed area of around 4.8 cm 2. A three electrode cell setup was used to control the potential between the working and reference (saturated calomel) electrode.

The results showed that in the CO 2 saturated water phase, the addition of 2000 ppm hydrogen sulfide (H 2 S) instantaneously decreased the corrosion rate of carbon steel API 5L X65 at both 25°C and 80°C. The surface morphology and the composition of the corrosion product layers

corrosion of an API 5L X65 carbon steel exposed to top of the line conditions. Special emphasis is data reported herein may provide additional information that could lead to a better understanding of how to define sweet, sour and ultimately marginally sour systems. (EDS) microanalysis was used for chemical analysis. Prior

Fu et al. reported that an X65 steel electrode containing a 1 mm coated defect has higher electrochemical dissolution activity than an electrode containing a 10 mm defect on the AC induced corrosion. Nevertheless, their investigation focuses on the AC induced corrosion within single coating defects on pipeline steel and excludes the study of

Mackinawite is the only product formed on the X65 carbon steel surface under the test conditions. The XPS results (Figure 15)of iron sulfide scale formed on the steel surface under the conditions of T 80°C, pH 5, Fe2 + Oppm, H2S 10%, and the reaction time 23 hours are in good agreement with the XRD results. FeS is the predominant product

Impact against X65 steel pipes An experimental investigation experimental data on a pipe being struck and stretched, investiga (EDS) of the ma trix, it was evident that it contained Fe, Mn and C, as expected from the material inspection certicate. SEM investigations of the unde

Oct 11, 2018 · The chemical composition of corrosion products on the pipe surface of the 2, 4, and 6 steel pipe was obtained by energy dispersive spectroscopy (EDS) analysis using the JXA 8230 SEM. The phase compositions of corrosion products were analyzed using an X Pert PRO MPD X ray diffraction (XRD, PANalytical B.V., Almelo, The Netherlands).

Adsorption Aspects, Inhibitory Properties and a Study of Surface Corrosion of Carbon Steel in Acidic Media The X65 steel (carbon steel) specimen was taken from Iraq's oil fields and had the following composition, as was linked with Energy Dispersive Spectroscopy (EDS) Analysis (Oxford Instruments, UK) to study and

X65 pipeline steel was investigated in a bicarbonate solution. A layer of protective impedance data.. 90 Table 5.3 Surface roughness and root mean square height of the steel electrode derived from the AFM images. Table 6.1 EDS results (weight percentage, %) obtained on as received SiO 2

@article{osti_403633, title = {Fracture behavior of surface cracked wide plates of high strength steel containing overmatched repair welds}, author = {Junghans, E. and Kocak, M. and Schwalbe, K.H.}, abstractNote = {This paper presents the experimental results of tests conducted using surface cracked wide plates containing overmatched repair weld joints.

Figure 1 Optical microscopy image of the inclusions distribution in the microstructure of the API 5L X65 steel (a), representative EDS spectrum of to corrosion, characterized by more depolarized anodic and cathodic curves and higher corrosion current densities. The data presented in Table The inclusions of the API 5L X65 steel were

To disclose CO 2 corrosion behavior of 3% Cr with temperature in more details, CO 2 corrosion data derived from Ref [10 L.H. Hu, L. Zhang, W. Chang, M.X. Lu, and L.N. Xu, "Compare the corrosion resistance of 3% Cr steel with API X65 pipeline steel in CO 2 corrosion environment", The 66 th NACE Annual Conference, .Houston, Texas https://www