Results 171 to 180 of about 893 (202)

Effect of Inclusion on Pitting Corrosion of X80 Pipeline Steel

Advanced Materials Research, 2015
The influence of inclusion on pitting corrosion of X80 pipeline steel was investigated by using electrochemical test and atomic force microscope. The results indicated that corrosion potential of X80 pipeline steel sample with higher grade inclusion was lower, and decreased significantly with chloride ion concentration increasing.
Feng Jun Lang, Xian Qiu Huang, Tao Pang, Ying Ma, Peng Cheng, Rui He   +5 more
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Microstructure characteristics and mechanical properties of X80 pipeline steels

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2012
The relation between microstructure characteristics and mechanical properties of X80 pipeline steels was investigated using optical microscopy, scanning electron microscopy, etc. It is shown that the structure consists of polygonal ferrite (PF), quasi-polygonal ferrite (QPF), acicular ferrite (AF), and granular bainitic ferrite (GF).
Min Zhou, Linxiu Du, Yanfeng Zhao, Xianghua Liu   +3 more
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Passivation process of X80 pipeline steel in bicarbonate solutions

International Journal of Minerals, Metallurgy, and Materials, 2011
The passivation process of X80 pipeline steel in bicarbonate solutions was investigated using potentiodynamic, dynamic electrochemical impedance spectroscopy (DEIS), and Mott-Schottky measurements. The results show that the shape of polarization curves changes with HCO 3 − concentration. The critical
Jian-long Zhou, Xiao-gang Li, Cui-wei Du, Ying Pan, Tao Li, Qian Liu   +5 more
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SH-CCT of High-Strain Pipeline Steel X80

Advanced Materials Research, 2012
Simulated heat affected zone continuous cooling transformation curve was measured by means of Gleeble 3500 thermal simulator. According to the results of microstructure observation and hardness measurement, influence of cooling rates on the microstructure and hardness in coarse grain zone of high-strain pipeline steel X80 was studied.
Mei Juan Hu, Peng Wang, Wei Ping Lin, Xiao Yan Wang, Ling Kang Ji   +4 more
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Constitutive relationship of hot deformation of X80 pipeline steel

2010 International Conference on Mechanic Automation and Control Engineering, 2010
In order to realize numerical simulation of hot rolling and establish the hot deformation process parameters for X80 pipeline steel, the flow stress behavior of X80 pipeline steel during hot deformation was investigated in the temperature range of 900–1100°C and strain rate of 0.01–1s−1 on Gleeble-3500 thermo-simulation machine.
null Ma Bo, null Peng Yan, null Liu Yun-fei, null Jia Bin   +3 more
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Development mechanism of internal local corrosion of X80 pipeline steel

Journal of Materials Science & Technology, 2020
Abstract The occurrence and development mechanism of internal local corrosion has always been a controversial topic, and especially under flow conditions. In this paper, an improved high shear force loop was experimentally used, and local flow field is induced by simulating corrosion defects on the surface of X80 pipeline steel specimens.
Zhuowei Tan, Liuyang Yang, Dalei Zhang, Zhenbo Wang, Frank Cheng, Mingyang Zhang, Youhai Jin   +6 more
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Effect of Microstructures on Corrosion of X80 Pipeline Steel in an Alkaline Soil

Advanced Materials Research, 2012
The influence of microstructures with different heat treatments to stimulate the weld fusion zone and HAZ on corrosion properties of X80 pipeline steel was investigated in alkaline sand soil using electrochemical measurement and surface analysis(SEM, EDS and XRD).
Cong Min Xu, Rong Biao Li, Ji Long Wang, Gang Gang Zhang   +3 more
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THE SOFTENING BEHAVIOR OF HIGHER NIOUBIUM CONTENT X80 PIPELINE STEEL

International Journal of Modern Physics B, 2009
In this paper, the softening behavior of higher Nb content X80 pipeline steel was investigated by means of the stress relaxation curve. Deformed above 1050°C, the softening of the steel is fast and controlled by static recrystallization. Although the softening at 1000°C is slower obviously, it was also controlled by static recrystallization, no more ...
CHENGLIANG MIAO, CHENGJIA SHANG
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Recommendations on X80 steel for the design of hydrogen gas transmission pipelines

International Journal of Hydrogen Energy, 2012
Abstract By limiting the pipes thickness necessary to sustain high pressure, high-strength steels could prove economically relevant for transmitting large gas quantities in pipelines on long distance. Up to now, the existing hydrogen pipelines have used lower-strength steels to avoid any hydrogen embrittlement.
Briottet, L., Batisse, R., de Dinechin, G., Langlois, P., Thiers, L.   +4 more
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Study on AC Corrosion on Cathodically Protected Pipeline of X80 Steel

CORROSION 2014, 2014
Abstract Alternating current (AC) induced-corrosion on cathodically protected pipeline of X80 steel was studied by electrochemical impedance spectra (EIS). Experiments show that: EIS curves contain two time constants which represent high-frequency capacitance arc and low-frequency inductive loop, respectively.
Peng Zhang, Jinfu Ma, Zhenjun Liu, Chunyan Ye   +3 more
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