ChemInform Abstract: ELECTROCHEMICAL BEHAVIOR AND PHOTO-EXCITABILITY OF TITANIUM OXIDES LAYER FORMED UNDER LOW ANODIC POLARIZATION CONDITIONS

1980 ◽  
Vol 11 (22) ◽  
Author(s):  
J. C. PESANT ◽  
P. VENNEREAU
Keyword(s):  
Electrochemical Behavior ◽  
Anodic Polarization ◽  
Titanium Oxides

scholarly journals Electrochemical behavior of AgCu50 in alkaline media in the presence of chlorides and 2-mercaptobenzothiazole

2017 ◽  
Vol 53 (3) ◽  
pp. 349-356 ◽  
Author(s):  
V. Grekulovic ◽  
M. Rajcic-Vujasinovic ◽  
A. Mitovski
Keyword(s):  
Electrochemical Behavior ◽  
Electrode Surface ◽  
Anodic Polarization ◽  
Pure Copper ◽  
Inhibitory Effect ◽  
Open Circuit ◽  
Alkaline Media ◽  
Nacl Solution ◽  
Pure Silver ◽  
Current Densities

Electrochemical behavior of an alloy AgCu50, pure copper, and pure silver, respectively, was investigated by measuring the open circuit potentials using anodic potentiodynamic polarization and potentiostatic method in 0.1 moldm-3 NaOH + 0.02 moldm-3 NaCl solution, without and with adding 2-mercaptobenzothiazole in various concentrations (0.00001 - 0.001 moldm-3). Anodic polarization curves for AgCu50 alloy, showed four current peaks. Potentiostatic curves showed that values of the stationary current densities drop down with the increase of 2-mercaptobenzothiazole concentration in the electrolyte. The electrode surface was analyzed by optical microscopy after the potentiostatic oxidation. Micrographs confirmed that 2-mercaptobenzothiazole has got the inhibitory effect by forming the film of CuMBT and AgMBT which protect the electrode surface from corrosion.

scholarly journals Electrochemical Behavior of Conventional and Rheo-High-Pressure Die Cast Low Silicon Aluminum Alloys in NaCl Solutions

CORROSION ◽  
10.5006/3254 ◽  
2019 ◽  
Vol 75 (11) ◽  
pp. 1339-1353
Author(s):  
Maryam Eslami ◽  
Flavio Deflorian ◽  
Caterina Zanella
Keyword(s):  
High Pressure ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Behavior ◽  
Anodic Polarization ◽  
Electrochemical Impedance ◽  
Casting Process ◽  
Corrosion Mechanism ◽  
Die Cast ◽  
Polarization Test

The electrochemical behavior of a low silicon aluminum alloy cast by the conventional and rheo-high-pressure die cast processes is evaluated using polarization test and electrochemical impedance spectroscopy in 0.01 M, 0.05 M, 0.1 M, and 0.6 M sodium chloride solutions. Compared to the conventional high-pressure die cast process, rheocasting introduces some alterations in the microstructure including the presence of aluminum grains with different sizes, formed at different solidification stages. According to the results of the anodic polarization test, conventional cast and rheocast samples show similar breakdown potentials. However, the rheocast samples present enhanced oxygen reduction kinetics compared to the conventional cast sample. Based on scanning electron microscopy examinations, localized microgalvanic corrosion is the main corrosion mechanism for both alloys and it initiates at the interface of aluminum with iron-rich intermetallic particles which are located inside the eutectic regions. The corrosion further develops into the eutectic area. Although the rate of the cathodic reaction can be influenced by the semisolid microstructure, according to the results of anodic polarization and electrochemical impedance spectroscopy tests, the corrosion behavior is not meaningfully affected by the casting process.

Corrosion of Galvanized and Galvannealed Steel in Solutions of pH 9.0 to 14.0

CORROSION ◽  
1985 ◽  
Vol 41 (11) ◽  
pp. 618-624 ◽  
Author(s):  
G. Sergi ◽  
N. R. Short ◽  
C. L. Page
Keyword(s):  
Electrochemical Behavior ◽  
Anodic Polarization ◽  
Marked Effect ◽  
Alloy Layer ◽  
Zinc Alloy ◽  
Solution Ph ◽  
X Ray ◽  
Potentiodynamic Anodic Polarization ◽  
Zinc Coatings ◽  
Galvannealed Steel

Abstract Well-characterized zinc coatings on steel have been prepared so that either the eta or zeta phase was present as the outermost layer. Their electrochemical behavior was studied in a range of solutions by galvanostatic anodic polarization and potentiodynamic anodic polarization scans. The corrosion products were identified using scanning electron microscopy (SEM) and x-ray analysis. Results show that the solution pH has the most marked effect on electrochemical behavior and the nature of the corrosion product formed. At a given solution pH, the behavior and products formed are modified according to the concentration of chloride in the solution and the type of iron-zinc alloy layer investigated. The results are discussed in relation to the practical use of galvanized reinforcement in concrete.

Corrosion Behavior of the Tin-Containing Silver-Mercury Phase of Dental Amalgam

1974 ◽  
Vol 53 (4) ◽  
pp. 925-932 ◽  
Author(s):  
N.K. Sarkar ◽  
E.H. Greener
Keyword(s):  
Corrosion Behavior ◽  
Electrochemical Behavior ◽  
Anodic Polarization ◽  
Dental Amalgam ◽  
Ringer’S Solution ◽  
Polarization Studies

Through the use of anodic polarization studies in Ringer's solution, the electrochemical behavior of γ 1 phase of dental amalgam (Ag2Hg3) and γ 1 containing dissolved tin is compared with that for the γ 2 phase in dental amalgam (Sn7-8Hg). The results indicate that when tin is dissolved in γ1 it does not affect the electrochemical behavior of that phase.

Electrochemical behavior of La0.8Sr0.2FeO3 electrode with different porosities under cathodic and anodic polarization

2013 ◽  
Vol 39 (5) ◽  
pp. 5263-5270 ◽  
Author(s):  
Jing Wang ◽  
Yong Zhang ◽  
Wenli Guo ◽  
Xiangyuan Hou ◽  
Tongxiang Liang ◽  
...  
Keyword(s):  
Electrochemical Behavior ◽  
Anodic Polarization

scholarly journals Ceramic electrodes based on Magneli phases of titanium oxides

2007 ◽  
Vol 39 (1) ◽  
pp. 51-57 ◽  
Author(s):  
A.A. Gusev ◽  
E.G. Avvakumov ◽  
A.ZH. Medvedev ◽  
A.I. Masliy
Keyword(s):  
Sulfuric Acid ◽  
Anodic Polarization ◽  
Ceramic Materials ◽  
Neutral Atmosphere ◽  
Titanium Oxides ◽  
Magnéli Phases ◽  
Ceramic Samples ◽  
Ceramic Electrodes ◽  
Hollow Cylinders ◽  
Reductive Atmosphere

Monophase and polyphase ceramic materials based on Magneli phases of titanium oxides of composition Ti3O5, Ti4O7, Ti5O9, and Ti6O11 were synthesized. The materials were obtained by mechanical activation of rutile with titanium and additives of niobium, vanadium, and iron, with subsequent sintering both in reductive atmosphere (hydrogen) and in neutral atmosphere (argon) in the temperature interval of 1060-1080?C. The dependences of the potentials of the obtained ceramic samples on time and composition during anodic polarization at current density of 5A/dm2 in a 1M solution of sulfuric acid were investigated. We developed a technique for manufacturing anodes in the form of hollow cylinders 60 mm in diameter with a wall 5 mm thick, and flat discs more than 60 mm in diameter.

scholarly journals Electrochemical Behavior of Silver Electrode in Sulphuric Acidic Solution During Anodic Polarization

2015 ◽  
Vol 31 (4) ◽  
pp. 1867-1872 ◽  
Author(s):  
A Bayesov ◽  
E Tuleshova ◽  
A Tukibayeva ◽  
G Aibolova ◽  
F Baineyeva
Keyword(s):  
Electrochemical Behavior ◽  
Anodic Polarization ◽  
Acidic Solution ◽  
Silver Electrode
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