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Online since: September 2013
Authors: Ming Qiang Lin, Feng Juan Dai, Shi Yan Song
The survey data shows that the oil and gas pipeline is the main corrosion of the electrochemical corrosion pit on corrosion; In 767 cases of corrosion failure accident statistics results show that the local corrosion of metals account for about 80%, the pitting corrosion, stress corrosion and corrosion fatigue occupy prominent position [1].
It was pointed out that the tensile strength decreases gradually and the total elongation decreases drastically with the increase of the thickness loss due to pitting corrosion.The reduction of the tensile strength of the members with pitting corrosion is larger than that of members with uniform thickness loss in terms of average thickness loss.
Online since: April 2020
Authors: Ludmila N. Makarova, Viktor V. Povetkin
Table 1 – Effect of cathode current density on the characteristics of the electrodeposition process and the quality of Zn-Co alloy coatings Current density, А/dm2 Cobalt content, % Current output, % Throwing power, % Appearance of coatings 0.5 9.5 97 53 dark gray, matt 0.75 - 95 60 dark gray, matt 1.0 9.1 93 68 gray, matt 1.5 8.8 91 70 Light gray, smooth 2.0 7.6 90 71 Light, semi-gloss 2.5 6.5 89 72 Light, semi-gloss, "tan" on the edges 3.0 5.3 85 75 Light, rough The throwing power of the electrolyte increases with increasing current density, which is in full agreement with the data on the cathode current output of the alloy which gradually decreases with increasing current density.
The decrease in cobalt current output is due to the fact that the rate of reduction of hydrogen ions increases.
Online since: November 2012
Authors: Bao Tian Wang, Yun Dong, Wei Zhong He
Introduction Stabilized expansive soils is widely used in subgrade in expansive soil area, the shear strength of the stabilized expansive soils always affected by cyclic wetting and drying which caused by rain or the water level variations of the lake or river, the strength reduction will severely affected the safety of the slope.
Table 1 Shear strength after different tomes cycle Number of cycles 0 1 3 5 7 9 (deg) 30 24 21 18 17 17 C (kPa) 95 56 41 37 36 35 In order to facilitate data analysis and processing, adjusted test results of 0 times cycle to 0.01 times, and drawn the sketch of , C and cycle times based on the test results in figure 2.
Online since: April 2009
Authors: Xue Hui Huang, Hao Chen, Ting Ting Wu
Pervoskite-like compound oxides are outstanding (redox) oxidation-reduction catalysts, in a recent publication compound oxides ABO3 (A=Ln,rare metals, B=Mn, Cr ,Fe, Ni, transition metals) A-site ions constitute the changes of B-site ions' redox capability and the effect of catalysis activities[1-3].
The XRD data collected are shown in Fig. 1.
Online since: January 2010
Authors: Bao Gai Zhai, Yuan Ming Huang, Qing Lan Ma
Our data indicate that the three benzene-ring containing bent-core compound 1,3-phenylene-bis[4-(nonylcarboyloxyl)benzyl ideneamine] can exhibit mesogenic properties in the temperature range of 130-173 o C.
The reduction of the nucleating sites should result in a larger single crystal.
Online since: January 2010
Authors: Yuan Ming Huang, Bao Gai Zhai, Qing Lan Ma
Here we describe data showing the effects of cyclic heating and cooling on the growth behaviors of a prototypical banana-shaped LC 1,3-phenylene-bis[4-(4-octylphenylimino)methyl]benzoate.
The reduction of the nucleating sites should result in a larger single crystal.
Online since: June 2010
Authors: Dong Hyuk Shin, In Jun Hwang, Kang Min Lee, Bong Young Yoo
Research on PEO process for many different metals have been proposed, and especially Mg and its alloys are studied, because magnesium oxide layer produced by PEO is effective passive layer to enhance corrosion resistance and wear resistance of Mg and its alloys having negative reduction potential [1].
These data clearly showed that the corrosion resistance with increasing the coating voltage resulted in the better corrosion protective property of AZ91 Mg alloy in solution containing Cl- ion [6].
Online since: June 2010
Authors: Z. Tang, Ping Bo Wu, Zhu Yang
Generally consindering, fatigue testing can not give enough data to predict the in-service life of materials.
mv× −    Ψ is the subset of modal matrix, v is the number of test points, m is modal reduction number.
Online since: March 2010
Authors: A. Noordin, Mohd Zarhamdy Md Zain, Abd Rahim Abu Bakar, Mohd Azli Salim
Table 1: Parameter of arm and blade Parameter Data Unit 0.25 kg 0.21 kg 0.20 Ns/m 1.1x104 N/m 5.3x10-3 M 0.52 Radian 2.5x10-2 Nm/radian 8x103 N/m 3x104 N/m 5 Ns/m 8.3 N Input Shaping Scheme Input shaping scheme involves command based on the sequence impulses, in other word it also known as an input shaper where the system produced the shaped system command.
[2] Shinya Goto, Hiroshi Takahashi, Takio Oya: Investigation of wiper blade squeal noise reduction measures, Society of Automotive Engineers, 2001-01-1410, 2001
Online since: December 2012
Authors: Ying Gao, Jue Yuan, Rui Zhao Wang
A data reduction scheme for triangulated surfaces.
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