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Items from 1 to 20 out of 29 results

article

Achieving ultra‐low friction of a‐C:H film grown on 9Cr18Mo steel for industrial application via programmable high power pulse magnetron sputtering

Lei Sun, Qian Jia, Bin Zhang, Kaixiong Gao, more

Surface and Interface Analysis > 54 > 2 > 81 - 91

Owing to the high hardness and hydrogen passivation of carbon bonds, hydrogenated diamond‐like carbon (a‐C:H) film has shown promising potential to achieve ultra‐low friction and wear on steel surfaces. Here, a‐C:H film was successfully deposited on 9Cr18Mo steel via programmable high power pulse magnetron sputtering and potential application for industrial was evaluated. The a‐C:H films against different...

article

Sorption of Radionuclides from the Primary Circuits of Reactors with Pb–Bi Coolant onto the Surface of Structural Materials of the Reactor Core

V. S. Naumov, E. E. Konovalov

Radiochemistry > 2018 > 60 > 2 > 186-194

Sorption and phase distribution of ⁵⁴Mn, ⁵⁹Fe, ⁶⁰Со, ¹⁰⁶Ru, ¹²⁵Sb, ¹³⁷Cs, ¹⁴⁴Се, ^154,155Eu, and ^235,238U radionuclides in contact of the Pb–Bi melt with the steel surface were studied. Radionuclides of the elements with the minimal oxygen affinity (Ru, Te, and Sb) remain mainly in the coolant melt and are weakly sorbed onto the solid phase. The other fission product radionuclides having higher oxygen...

article

Steel surface defects recognition based on multi-type statistical features and enhanced twin support vector machine

Maoxiang Chu, Rongfen Gong, Song Gao, Jie Zhao

Chemometrics and Intelligent Laboratory Systems > 2017 > 171 > C > 140-150

For steel surface defect recognition, feature extraction and classification are very important steps. In this paper, multi-type statistical features and enhanced twin support vector machine classifier are formulated and applied. Firstly, four types of statistical features for different attributes of defect region are proposed. They are insensitive to affine transformation in scale and rotation. And...

article

Distributed defect recognition on steel surfaces using an improved random forest algorithm with optimal multi-feature-set fusion

Yalin Wang, Haibing Xia, Xiaofeng Yuan, Ling Li, more

Multimedia Tools and Applications > 2018 > 77 > 13 > 16741- 16770

Inspecting steel surfaces is important to ensure steel quality. Numerous defect-detection methods have been developed for steel surfaces. However, they are primarily used for local defects, and their accuracy in detecting distributed defects is unsatisfactory because such defects are difficult to locate and have complex texture characteristics. To solve these issues, an improved random forest algorithm...

article

Graphite intercalated polyaniline composite with superior anticorrosive and hydrophobic properties, as protective coating material on steel surfaces

R.M.N.M. Rathnayake, M.M.M.G.P.G. Mantilaka, Masanori Hara, Hsin-Hui Huang, more

Applied Surface Science > 2017 > 410 > C > 445-453

Solid polymer composite systems are widely being used for potential technological applications in secondary energy sources and electrochromic devices. In this study, we synthesized and characterized a composite material composed of polyaniline (PANI) and natural needle platy (NPG) vein graphite. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), cyclic voltammetry (CV), scanning...

article

Chloride threshold value to initiate reinforcement corrosion in simulated concrete pore solutions: The influence of surface finishing and pH

Rita B. Figueira, Andrei Sadovski, Ana P. Melo, Elsa V. Pereira

Construction and Building Materials > 2017 > 141 > C > 183-200

The influence of steel surface finishing and pH of simulated concrete pore solutions (SCPS) on the chloride threshold value (CTV) was evaluated. Steel samples were analysed, with four different finishes: as received (T), diamond-polished (D), polished (P500) and pre-oxidized (DH). The studies were performed in SCPS with pH values of 11.6 and 13.5, and of different chloride concentrations. The electrochemical...

chapter

Steel surface defects recognition based on multi-label classifier with hyper-sphere support vector machine

Maoxiang Chu, Jie Zhao, Rongfen Gong, Liming Liu

2017 29th Chinese Control And Decision Conference (CCDC) > 3276 - 3281

2017 29th Chinese Control And Decision Conference (CCDC)

Aiming at steel surface defects recognition, this paper proposed a multi-label classifier with hyper-sphere support vector machine (HSVM-MC). Firstly, in order to describe steel surface defects well, a new set of edge distance statistical features are proposed. Then, based on twin-hypersphere support vector machine (THSVM), HSVM-MC is built by introducing binary relevance(BR) idea. This novel classifier...

article

Interactions between lubricant and steel substrate – a conceptual method of analysis

E. Pawelec, M. Neska

Tribologia > 2017 > nr 1 > 75--79

The paper demonstrates the methods for the analysis of the interaction between lubricant and steel substrate and presents the obtained results. The samples to be tested were commercially available greases as well as greases developed for the purpose of this research, containing a known amount of adhesion additives. Due to the lack of normalized methods, the authors applied indirect methods based on...

article

Simple separations of topographic and material contrasts using one annular type in‐lens detector of low‐voltage SEM

Masayasu Nagoshi, Takashi Kawano, Kaoru Sato

Surface and Interface Analysis > 48 > 7 > 470 - 473

Contrasts of low‐voltage secondary electron microscope images have been experimentally investigated using commercial instruments having an annular type in‐lens (IL) detector. The topographic and material contrasts of oxide particles on steel surfaces in the secondary electron microscope images recorded by the IL and the Everhart‐Thonley detectors systematically change as a function of working distance...

article

Restoration of obliterated engraved marks on steel surfaces by chemical etching reagent

Qingfang Song

Forensic Science International > 2015 > 250 > Complete > 33-36

Chemical etching technique is widely used for restoration of obliterated engraved marks on steel surface in the field of public security. The consumed thickness of steel surface during restoration process is considered as a major criterion for evaluating the efficiency of the chemical etching reagent. The thinner the consumed thickness, the higher the restoration efficiency. According to chemical...

article

Synergism of Saccharum officinarum and Ananas comosus extract additives on the quality of electroplated zinc on mild steel

Cleophas A. Loto

Research on Chemical Intermediates > 2014 > 40 > 5 > 1799-1813

Synergism of Saccharum officinarum (sugarcane) and Ananas comosus (pineapple) extract additives on the quality of electroplated zinc on mild steel in acid chloride solution was investigated experimentally at ambient temperature (~28 °C). The experiments were performed at different plating times (15 and 18 min), additive concentrations (2, 2.5, 3 ml/50 ml of acid chloride solution), pH 5, temperature...

article

Ocena odporności na uderzenia powłok epoksydowych, poliestrowych i polietylenowych na stalowych podłożach

P. Mayer, K. Pietrzak

Przetwórstwo Tworzyw > 2014 > [R.] 20, nr 6 (162) > 512--516

W artykule przedstawiono wyniki badań odporności na uderzenia wybranych powłok polimerowych naniesionych na powierzchnie stalowe. Wybrano trzy podłoża stalowe o różnej grubości, na które nakładane były powłoki epoksydowe, poliestrowe i polietylenowe. Przeprowadzone badania wykazały istotny wpływ rodzaju powłoki oraz jej grubości, a także grubości podłoża stalowego na odporność na uderzenia.

article

Effects of Nicotiana Tobaccum Extract Additive on the Quality of Electroplating of Zinc on Mild Steel

C.A. Loto, R.T. Loto

Polish Journal of Chemical Technology > 2013 > 15 > 1 > 38-45

Experimental investigations have been performed to determine the effects of nicotiana tobaccum (tobacco) extract additive on the electrodeposition of zinc on mild steel in acid chloride solution. The experiments were performed under different plating time, different additive concentrations and fixed pH conditions. Zinc electrodeposition on mild steel was performed using a DC - supply at defined operating...

article

Phenomenon of interaction between the solder melts on the basis of copper and the steel detail surface

I. Pashkov, O. Kustova, J. Vetrova

Welding Technology Review > 2013 > R. 85, nr 8 > 36--40

The article is devoted to problems in interaction between steel surface actually stainless steel one and the melt of copper based alloys. Conditions of base material properties decreasing have been determined including well-known effect of brittleness under the melt action. Authors studied effect of penetration of copper along the borders of steel grains. Possibility of stainless steel brazing process...

article

Modelowanie tarcia pomiędzy powierzchniami stalowymi ściany i gąsienicy robota wspinającego z zastosowaniem pakietu MD ADAMS

M. Cader, M. Cieśla

Mechanik > 2013 > R. 86, nr 2CD

W pracy przedstawiono metodologie doboru parametrów modelu tarcia wymaganych przez środowisko MD ADAMS dla powierzchni stalowych. Zaplanowano i przeprowadzono eksperymenty mające na celu wyznaczenie wartości wymaganych parametrów oraz eksperyment mający na celu weryfikacje tych wartości na obiekcie symulacyjnym – modelu robota wspinającego się po ścianach stalowych. W pracy przedstawiono wyniki obu...

article

Effects of Nicotiana Tobaccum Extract Additive on the Quality of Electroplating of Zinc on Mild Steel

C.A. Loto, R.T. Loto

Polish Journal of Chemical Technology > 2013 > Vol. 15, nr 1 > 37-45

article

Odporność na uderzenia wybranych powłok polimerowych na substratach stalowych

P. Mayer, J. W. Kaczmar

Przetwórstwo Tworzyw > 2012 > [R.] 18, nr 3 > 250-253

W artykule przedstawiono wyniki badań odporności na uderzenia wybranych powłok polimerowych naniesionych na powierzchnie stalowe. Podłoże stalowe przed nałożeniem powłok zostało poddane obróbce strumieniowo-ściernej elektrokorundem o różnej granulacji ziaren. Badaniom poddano powłoki otrzymane z poliuretanów i polimoczników. Przeprowadzone badania wykazały istotny wpływ parametrów chropowatości podłoża...

chapter

Passive infrared hyperspectral imaging for standoff detection of tetryl explosive residue on a steel surface

N B Gallagher, J F Kelly, T A Blake

2010 2nd Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing > 1 - 4

2010 2nd Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS 2010)

A commercial imaging FTIR spectrometer that operates between 850 and 1300 cm^-1 was used to passively image a galvanized steel plate stained with a residue of the explosive tetryl (2, 4, 6, N-tetranitro-N-methylaniline). The tetryl was coated onto the plate in a 30 cm diameter spot with an areal dosage of 110 μg tetryl/cm². The stain on the plate was easily detected at standoff distances of 14 and...

article

The influence of the laser doping with boron on a steel 30MnB4 structure and properties

S. Adamiak

Archives of Foundry Engineering > 2010 > Vol. 10, iss. 1 spec. > 361--364

The results of the research of the laser remelting of the steel surface 30Mn4B with the metalic boron layer on structures and microhardness changes have been presented in the paper. The surface layer of the tested steel was remelted with the laser of a continuos work. The power density was from 1,7∙10⁴to 3,0∙10⁴W/cm². The metallographic tests were conducted (LM and SEM) of the received structure and...

article

Erneuerung des Innenkorrosionsschutzes der Triebwasserleitungen im Pumpspeicherkraftwerk Markersbach

Andreas Gelhaar, Andreas Schneider, Ingo Lang

Stahlbau > 79 > 1 > 46 - 54

Im Pumpspeicherwerk Markersbach der Vattenfall Europe Generation AG wurde 2007 und 2008 der Korrosionsschutz der beiden Triebwasserleitungen (Durchmesser ca. 6 m) und Niederdruck‐ Verteilerrohrleitungen (Durchmesser bis zu 8,7 m) erneuert. Die zu bearbeitende Stahloberfläche betrug ca. 50000 m². Die Korrosionsschutzmaßnahme beinhaltete das Abstrahlen der Altbeschichtung mit Herstellung des Oberflächenvorbereitungsgrades...

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Achieving ultra‐low friction of a‐C:H film grown on 9Cr18Mo steel for industrial application via programmable high power pulse magnetron sputtering

Sorption of Radionuclides from the Primary Circuits of Reactors with Pb–Bi Coolant onto the Surface of Structural Materials of the Reactor Core

Steel surface defects recognition based on multi-type statistical features and enhanced twin support vector machine

Distributed defect recognition on steel surfaces using an improved random forest algorithm with optimal multi-feature-set fusion

Graphite intercalated polyaniline composite with superior anticorrosive and hydrophobic properties, as protective coating material on steel surfaces

Chloride threshold value to initiate reinforcement corrosion in simulated concrete pore solutions: The influence of surface finishing and pH

Steel surface defects recognition based on multi-label classifier with hyper-sphere support vector machine

Interactions between lubricant and steel substrate – a conceptual method of analysis

Simple separations of topographic and material contrasts using one annular type in‐lens detector of low‐voltage SEM

Restoration of obliterated engraved marks on steel surfaces by chemical etching reagent

Synergism of Saccharum officinarum and Ananas comosus extract additives on the quality of electroplated zinc on mild steel

Ocena odporności na uderzenia powłok epoksydowych, poliestrowych i polietylenowych na stalowych podłożach

Effects of Nicotiana Tobaccum Extract Additive on the Quality of Electroplating of Zinc on Mild Steel

Phenomenon of interaction between the solder melts on the basis of copper and the steel detail surface

Modelowanie tarcia pomiędzy powierzchniami stalowymi ściany i gąsienicy robota wspinającego z zastosowaniem pakietu MD ADAMS

Effects of Nicotiana Tobaccum Extract Additive on the Quality of Electroplating of Zinc on Mild Steel

Odporność na uderzenia wybranych powłok polimerowych na substratach stalowych

Passive infrared hyperspectral imaging for standoff detection of tetryl explosive residue on a steel surface

The influence of the laser doping with boron on a steel 30MnB4 structure and properties

Erneuerung des Innenkorrosionsschutzes der Triebwasserleitungen im Pumpspeicherkraftwerk Markersbach

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