scholarly journals Identification of corrosion products on iron artefact from Bratislava castle

2021 ◽  
Vol 14 (1) ◽  
pp. 1-6
Author(s):  
Roman Košťúr ◽  
Matilda Zemanová
Keyword(s):  
Raman Spectroscopy ◽  
Corrosion Products ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atmospheric Exposure

Abstract Corrosion layers of an iron artefact were characterized to study long-term exposition of iron in Slovakia. The iron artefact from Bratislava castle has been coated with a strong layer of corrosion products and masonry residues. Corrosion products were characterized by different methods including energy-dispersive X-ray spectroscopy (EDX), X-Ray diffraction (XRD), and µ-Raman Spectroscopy. Magnetite and goethite on the surface are confirmed typical corrosion products from long-term atmospheric exposure in environment with corrosivity category C-2 (low).

scholarly journals Origin of Ultraviolet Luminescence from Bulk ZnO Thin Films Grown by Molecular Beam Epitaxy

2011 ◽  
Vol 1 ◽  
pp. 135-139 ◽  
Author(s):  
M. Asghar ◽  
Khalid Mahmood ◽  
Adnan Ali ◽  
M.A. Hasan ◽  
I. Hussain ◽  
...  
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Molecular Beam Epitaxy ◽  
Room Temperature ◽  
Molecular Beam ◽  
Energy Dispersive ◽  
Zno Thin Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Luminescence

Origin of ultraviolet (UV) luminescence from bulk ZnO has been investigated with the help of photoluminescence (PL) measurements. Thin films of ZnO having 52%, 53% and 54% of Zn-contents were prepared by means of molecular beam epitaxy (MBE). We observed a dominant UV line at 3.28 eV and a visible line centered at 2.5 eV in the PL spectrum performed at room temperature. The intensity of UV line has been found to depend upon the Zn percentage in the ZnO layers. Thereby, we correlate the UV line in our samples with the Zn-interstitials-bound exciton (Zni-X) recombination. The results obtained from, x-ray diffraction, the energy dispersive X-ray spectrum (EDAX) and Raman spectroscopy supported the PL results.

Identification of Arsenic in the Water Using Energy Dispersive X-Ray Diffraction

2012 ◽  
Vol 588-589 ◽  
pp. 1108-1110
Author(s):  
Fang Zhang ◽  
Min Qiang Li ◽  
Jin Huai Liu
Keyword(s):  
Aqueous System ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
Sodium Arsenate ◽  
Reservoir Water ◽  
X Ray ◽  
Low Concentrations ◽  
Toxic Pollutant ◽  
Significant Attention

The occurrence of arsenic in natural water has received significant attention during recent years. The arsenic plays an important role for its behavior and toxicity in the aqueous system. Arsenic is a toxic pollutant in water with serious health effects upon long-term intake of even low concentrations through drinking water consumption population. By means of the energy-dispersive X-ray diffraction (EDXRD) technique, confected different concentrations of sodium arsenate solution and reservoir water of Tuoketuo county in the Inner Mongolia, were analyzed. The result shows that arsenic is present within reservoir water of Tuoketuo county. But, fluorescence peak photons of arsenic in the solution are not in proportion to the concentration. So, it is difficulty to quantitatively decide the concentration of the arsenic in the water.

Fabrication of Cu2ZnSnS4 Thin Films through Sulfurization of Co-Electrodeposited Cu-Zn-Sn Metallic Precursor

2014 ◽  
Vol 915-916 ◽  
pp. 838-841
Author(s):  
Meng Xie ◽  
Hai Tao Zhang ◽  
Shu Zhang ◽  
Yong Xiang
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
Homogeneous Surface ◽  
Metallic Precursor ◽  
X Ray

Cu2ZnSnS4 thin films have been synthesized through sulfurization of co-electrodeposited Cu-Zn-Sn metallic precursor. The obtained metallic precursor shows homogeneous surface. Combination of X-ray diffraction, energy dispersive X-Ray spectroscopy and Raman spectroscopy results shows that kesterite structure of Cu2ZnSnS4 is formed, demonstrating that co-electrodeposition-sulfurization is a viable process for the synthesis of Cu2ZnSnS4 film.

scholarly journals Program of experimental atmospheric corrosion tests of weathering steels

2015 ◽  
Vol 59 (1) ◽  
pp. 7-18
Author(s):  
V. Křivý ◽  
K. Kreislová ◽  
V. Urban ◽  
K. Vavrušová
Keyword(s):  
Atmospheric Corrosion ◽  
Corrosion Products ◽  
Experimental Program ◽  
Structural Elements ◽  
X Ray Diffraction ◽  
Corrosion Tests ◽  
X Ray ◽  
One Year ◽  
Supporting Structures

Abstract This article presents the program of experimental atmospheric corrosion test of weathering steels. This program is designed as a long-term project. Attention is paid to study of corrosion processes at different structural elements of supporting structures of bridges. Measurements of corrosion losses and average thicknesses of corrosion products are carried out within this experimental program. Protective ability of corrosion products is evaluated using X-ray diffraction analysis. The article presents results of corrosion tests after one year of exposure of corrosion specimens. It results from the tests that corrosion losses of weathering steels are signifi cantly conditioned by position and location of exposed surface within the structure.

Short-term and long-term effects of osteoporosis on incisor teeth and femoral bones evaluated by Raman spectroscopy and energy dispersive X-ray analysis in ovariectomized rats

2018 ◽  
Vol 37 (1) ◽  
pp. 18-27 ◽  
Author(s):  
Fernanda Rossi Paolillo ◽  
Renan Arnon Romano ◽  
Luciana de Matos ◽  
Airton Abrahão Martin ◽  
Francisco Eduardo Gontijo Guimarães ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Energy Dispersive ◽  
Ovariectomized Rats ◽  
Long Term Effects ◽  
Short Term ◽  
X Ray

scholarly journals Application of µ-Raman spectroscopy to the study of the corrosion products of archaeological coins

ACTA IMEKO ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 234
Author(s):  
Tilde De Caro ◽  
Emma Angelini ◽  
Leila Es Sebar
Keyword(s):  
Raman Spectroscopy ◽  
Analytical Techniques ◽  
Corrosion Products ◽  
Lead Chloride ◽  
X Ray Diffraction ◽  
X Ray ◽  
Micro Raman Spectroscopy ◽  
Experimental Findings ◽  
Non Destructive ◽  
Excavation Site

<p>In this paper, a study of the corrosion products formed on archaeological bronze artefacts excavated in Tharros (Sardinia, Italy) is presented. The investigation was carried out by means of the combination of different analytical techniques, including optical microscopy, micro-Raman spectroscopy (µ-RS), scanning electron microscopy coupled with energy dispersive X-ray spectroscopy and X-ray diffraction. The artefacts under study are three bronze coins from the Phoenician–Punic period that are deeply corroded due to the chloride-rich soil of the Tharros excavation site. µ-Raman spectroscopy was chosen to investigate the corroded surfaces of the artefacts because it is a non-destructive technique, it has high spatial resolution, and it makes it possible to discriminate between polymorphs and correlate colour and chemical composition. Through µ-RS, it was possible to identify different mineralogical phases and different polymorphs, such as cuprite (Cu<sub>2</sub>O), copper trihydroxychloride [Cu<sub>2</sub>Cl(OH)<sub>3</sub>] polymorphs, hydroxy lead chloride laurionite [PbCl(OH)] and calcium carbonate polymorph aragonite. The experimental findings highlight that micro-Raman spectroscopy can be used to provide further knowledge regarding the environmental factors that may cause the degradation of archaeological bronzes in soil.</p>

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