Characterization of the Corrosion Products Formed on Carbon Steel in Qinghai Salt Lake Atmosphere

CORROSION ◽  
2007 ◽  
Vol 63 (7) ◽  
pp. 640-647 ◽  
Author(s):  
Q. X. Li ◽  
Z. Y. Wang ◽  
W. Han ◽  
E. H. Han
Keyword(s):  
Carbon Steel ◽  
Salt Lake ◽  
Electrochemical Techniques ◽  
Corrosion Products ◽  
Infrared Transmission ◽  
X Ray Diffraction ◽  
Cathodic Current ◽  
Free Corrosion Potential ◽  
X Ray

Abstract The corrosion products formed on carbon steel exposed to the Qinghai Salt Lake atmosphere for 12 months was studied using scanning electron microscopy (SEM), electron probe microanalysis (EPMA), x-ray diffraction (XRD), infrared transmission spectroscopy (IRS), and electrochemical techniques. The rust was mainly composed of akaganeite (β-FeOOH), iron hydroxychloride (Fe8[O,OH]16Cl1.3), and a little lepidocrocite (γ-FeOOH). Amorphous δ-FeOOH was only on the downward surface, and the upward surface was corroded more severely than the downward surface. Cl, Mg, and Si foreign elements were rich in the rust. The rust on carbon steel decreased anodic dissolution and increased cathodic current. A low free corrosion potential of the rusted electrode and a very small value of rust resistance (RR) demonstrated that the rust was nonprotective in the Qinghai Salt Lake atmosphere.

scholarly journals Evaluation of 4-Year Atmospheric Corrosion of Carbon Steel, Aluminum, Copper and Zinc in a Coastal Military Airport in Greece

2020 ◽  
Vol 1 (1) ◽  
pp. 159-186
Author(s):  
Charalampos Titakis ◽  
Panayota Vassiliou
Keyword(s):  
Carbon Steel ◽  
Atmospheric Corrosion ◽  
Corrosion Damage ◽  
Outdoor Exposure ◽  
Atmospheric Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atomic Force ◽  
Optical Electron

Atmospheric corrosion seriously affects the working life of construction metals. The quantitative knowledge of the corrosion effects helps the maintenance and the materials’ logistics. In this work, in a military airport located by the sea, the corrosion damage equations of carbon steel, aluminum, zinc and copper are determined after outdoor exposure for four years. Exposure started in 2014, at two different periods of the year, in summer and in winter, for all cases. Weight loss measurements were performed as well as characterization of the exposed metal coupon surfaces by microscopy: optical, electron and atomic force, by X-ray diffraction and Fourier Transform Infrared Spectroscopy. Atmospheric conditions and pollutants were also evaluated. The derived corrosion equations of all tested metals for the exposure have been employed for the 30-year projection of expected corrosion. A parallel 12-month exposure of steel and aluminum—the most common airport metals—have been evaluated for five consequent years to designate the rating of the airport, according to ISO and ASTM Standards. The results showed that there is not a good correlation between the predictions of the Corrosion Damage Algorithm and the Europe Corrosion Map and the actual measurements on steel and aluminum at the site.

Fabrication and Characterization of Ni-TiO2 Nanocomposite Coatings and Their Corrosion Resistance Behaviors

2011 ◽  
Vol 688 ◽  
pp. 217-222 ◽  
Author(s):  
Jian Jun Hao ◽  
Yan An Bai ◽  
Chong Rui Wang ◽  
Xin Yuan Liu
Keyword(s):  
Corrosion Resistance ◽  
Nickel Coating ◽  
Electrochemical Techniques ◽  
Nanocomposite Coatings ◽  
X Ray Diffraction ◽  
X Ray ◽  
Excellent Corrosion Resistance ◽  
Watts Bath ◽  
Fabrication And Characterization

Ni-TiO2 nanocomposite coatings have been successfully fabricated via a route electrodeposition from nickel Watts bath containing nano-TiO2 particles, and characterized by scanning electron microscopy (SEM),X-ray diffraction(XRD), energy dispersive X-ray spectroscopy (EDS)and electrochemical techniques. The influence of preparation parameters on the properties of the coatings were investigated. The obtained results indicated that nano-TiO2 particles were distributed uniformly in the Ni matrix. It was found that the Ni-TiO2 nanocomposite coatings exhibited more excellent corrosion resistance and microhardness in comparison with pure nickel coating.

X-ray diffraction and magnetic characterization of the retained austenite in a chromium alloyed high carbon steel

2006 ◽  
Vol 41 (15) ◽  
pp. 4732-4736 ◽  
Author(s):  
S. S. M. Tavares ◽  
S. R. Mello ◽  
A. M. Gomes ◽  
J. M. Neto ◽  
M. R. da Silva ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Retained Austenite ◽  
High Carbon Steel ◽  
X Ray Diffraction ◽  
High Carbon ◽  
Magnetic Characterization ◽  
X Ray

scholarly journals In Situ Synchrotron X-Ray Diffraction Characterization of Corrosion Products of a Ti-Based Metallic Glass for Implant Applications

2018 ◽  
Vol 7 (21) ◽  
pp. 1800338 ◽  
Author(s):  
Petre Flaviu Gostin ◽  
Owen Addison ◽  
Alexander P. Morrell ◽  
Yue Zhang ◽  
Angus J. M. C. Cook ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Corrosion Products ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals In Situ Study of Graphene Oxide Quantum Dot-MoSx Nanohybrids as Hydrogen Evolution Catalysts

Surfaces ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 225-236
Author(s):  
Marco Favaro ◽  
Mattia Cattelan ◽  
Stephen W. T. Price ◽  
Andrea E. Russell ◽  
Laura Calvillo ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Electrochemical Techniques ◽  
Graphene Quantum Dots ◽  
Operating Conditions ◽  
X Ray Diffraction ◽  
Hydrogen Atoms ◽  
X Ray ◽  
X Ray Absorption

Graphene quantum dots (GOQDs)-MoSx nanohybrids with different MoSx stoichiometries (x = 2 and 3) were prepared in order to investigate their chemical stability under hydrogen evolution reaction (HER) conditions. Combined photoemission/electrochemical (XPS/EC) measurements and operando X-ray absorption spectroscopy (XAS) were employed to determine the chemical changes induced on the MoSx-based materials as a function of the applied potential. This in situ characterization indicates that both MoS2 and MoS3 materials are stable under operating conditions, although sulfur terminal sites in the MoS3 nanoparticles are converted from S-dimer (S22−) to S-monomer (S2−), which constitute the first sites where the hydrogen atoms are adsorbed for their subsequent evolution. In order to complete the characterization of the GOQDs-MoSx nanohybrids, the composition and particle size were determined by X-ray photoemission spectroscopy (XPS), X-ray diffraction (XRD) and Raman spectroscopy; whereas the HER activity was studied by conventional electrochemical techniques.

The Effect of Chloride on Carbon Steel Reinforcement Corrosion

2020 ◽  
Vol 833 ◽  
pp. 238-242
Author(s):  
Abulmaali M. Taher ◽  
Ayoub Alsayd ◽  
Elsadig Abdallah
Keyword(s):  
Sodium Chloride ◽  
Carbon Steel ◽  
Visual Inspection ◽  
Steel Reinforcement ◽  
Corrosion Products ◽  
Reinforcement Corrosion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nacl Concentration ◽  
Steel Bars

In this study, the effect of chloride in marine environment on carbon steel reinforcement corrosion was investigated. The nature of corrosion products produced was analyzed through visual inspection and X Ray Diffraction (XRD). It was very difficult using gain and loss technique alone to evaluate passivation conditions and corrosion reactions. It was found that the corrosion rate of steel increases with the increasing of sodium chloride (NaCl) concentration when steel bars without concrete were used. However, a passive film was formed on all steel samples embedded in concrete due to concrete alkalinity. Results reveal that most corrosion products were mainly FeO(OH) along with FeCO3 and Fe2O3.

scholarly journals Characterization of Sintered and Sintered/Plasma-Nitrided Fe-1.5% Mo Alloy by SEM, X-Ray Diffraction and Electrochemical Techniques

2002 ◽  
Vol 5 (2) ◽  
pp. 165-172 ◽  
Author(s):  
José de Pinho Alves Neto ◽  
Cristiano Giacomelli ◽  
Aloísio Nelmo Klein ◽  
Joel Louis Rene Muzart ◽  
Almir Spinelli
Keyword(s):  
Electrochemical Techniques ◽  
X Ray Diffraction ◽  
X Ray
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