چکیده مقاله
Corrosion is one of the problems of various industries, including oil and gas industries API X70 steel pipes are one of the most widely used steels in oil, gas and watertransmission lines due to their good toughness and suitable welding properties Thepassage of gas accompanied by moisture inside the pipes may cause corrosion on theinner surface of the steel, especially in the weld areas Therefore, in this research, threetypes of E8018 G electrodes were produced by different contents of Ni coded as Ni 0,Ni 0 7 and Ni 2 9, and then welding was carried out on X70 steel, and the corrosion ofthe base areas, HAZ and weld metals in the 3 5% NaCl corrosive environment wasinvestigated The results of the TOEFL diagram showed that with the increase of Ni, thecurrent of corrosion decreases and corrosion resistance of weld metal increases The CRand Rp of Ni 2 9 samples were 0 32mpy and 1 6320 09Ω cm2 respectively that waslowest corrosion rate compared to Ni 0 and Ni 0 7 weld metals The microstructure ofthesamples shows the weld metal sample with small amounts of nickel Ni 0 including bulkferrite α , Widmannstein ferrite and martensite M With increasing the nickel contentin Ni 0 7 the austenite areas γ in weld metal increased and α become slightly coarser Inthe Ni 2 9 sample, the structure is mainly of acicular ferrite αA type and blocky,therefore, the increase of nickel in the weld metal causes a more homogeneous structureand an increase in acicular ferrite and finally increases its corrosion resistance
کلیدواژهها
نویسندگان
M Fakheri
Department of Chemistry, Faculty of Science, Yazd University,Yazd ۸۹۱۹۵ ۷۴۱, Iran
H Zare
Department of Chemistry, Faculty of Science, Yazd University,Yazd ۸۹۱۹۵ ۷۴۱, Iran
M Mosallaepour
Associate professor, Material Science group, Engineering Faculty, Yazd University, Yazd, Iran
Z Mohammadpour
Department of Chemistry, Faculty of Science, Yazd University,Yazd ۸۹۱۹۵ ۷۴۱, Iran
شیوه ارجاع
Fakheri, M and Zare, H and Mosallaepour, M and Mohammadpour, Z,1401,Comparison of corrosion behavior of X70 welded specimens byusing modified and commertail E8018-G in3.5% NaCl corrosive medium,5th International Conference on Welding and Non Destructive Testing & 23rd National Conference on Welding & Inspection & 12th National Conference on NDT,Isfahan
ارائهشده در
مجموعه مقالات پنجمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب،بیست و سومین کنفرانس ملی جوش و بازرسی و دوازدهمین کنفرانس ملی آزمایش های غیرمخرب و اولین کنفرانس ملی ساخت افزایشی10 اسفند 1401 · اصفهان