Preparation and Characterization of Cu(II), Zn(II) Sulfides Obtained by Spontaneous Precipitation in Electrolyte Solutions

Langmuir ◽  
1998 ◽  
Vol 14 (18) ◽  
pp. 5298-5304 ◽  
Author(s):  
D. Tsamouras ◽  
E. Dalas ◽  
S. Sakkopoulos ◽  
P. G. Koutsoukos
Keyword(s):  
Electrolyte Solutions

Predictive Characterization of SEI Formed on Graphite Negative Electrodes for Efficiently Designing Effective Electrolyte Solutions

2022 ◽  
Author(s):  
Yasuhito Aoki ◽  
Mami Oda ◽  
Sachiko Kojima ◽  
Taihei Ishihama ◽  
Tsuyoshi Nagashima ◽  
...  
Keyword(s):  
Electrolyte Solutions ◽  
Negative Electrodes

Characterization of a Membrane-Based, Electrochemically Driven Pumping System Using Aqueous Electrolyte Solutions

2005 ◽  
Vol 77 (19) ◽  
pp. 6374-6380 ◽  
Author(s):  
Mya A. Norman ◽  
Christine E. Evans ◽  
Anthony R. Fuoco ◽  
Richard D. Noble ◽  
Carl A. Koval
Keyword(s):  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Aqueous Electrolyte Solutions ◽  
Pumping System

Characterization of the Corrosion Behavior of Alloy 22 after Five Years Immersion in Multi-ionic Solutions

2002 ◽  
Vol 757 ◽  
Author(s):  
Lana L. Wong ◽  
David V. Fix ◽  
John C. Estill ◽  
R. Daniel McCright ◽  
Raúl B. Rebak
Keyword(s):  
Lawrence Livermore National Laboratory ◽  
National Laboratory ◽  
Electrolyte Solutions ◽  
Underground Water ◽  
Localized Corrosion ◽  
General Corrosion ◽  
Uniform Corrosion ◽  
Waste Container ◽  
Alloy 22

ABSTRACTAlloy 22 (N06022) is the candidate material for the corrosion resistant, outer barrier of the nuclear waste container. Two of the potential corrosion degradation modes of the container are uniform corrosion and localized corrosion. A testing program is under way at the Lawrence Livermore National Laboratory to determine the susceptibility of Alloy 22 to these two forms of corrosion using immersion tests. Metallic coupons are being exposed to several electrolyte solutions simulating concentrated underground water from pH 3 to 10 at 60°C and 90°C. This paper describes the results obtained after more than a five-year exposure of 122 specimens to the testing electrolyte solutions. Results show little general corrosion and the absence of localized corrosion. The maximum general corrosion rate was 23 nm/yr.

Surface characterization of polymer foils

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Zdenka Kolská ◽  
Alena Řezníčková ◽  
Václav Švorčík
Keyword(s):  
Zeta Potential ◽  
Surface Characterization ◽  
Streaming Potential ◽  
Electrolyte Solutions ◽  
Force Microscopy ◽  
Angle Measurements ◽  
Atomic Force ◽  
Contact Angle Measurements ◽  
Polymer Foils

AbstractElectrokinetic potential (zeta potential) for selected 21 polymer foils was studied. The results on zeta potential are supplemented with contact angle measurements (goniometry) and with the results on surface roughness measured by atomic force microscopy (AFM). Zeta potential was determined using two approaches: streaming current and streaming potential at pH=6.0-6.2. Two electrolyte solutions with KCl (concentrations 0.001 and 0.005 mol/dm3) and KNO3 (0.001 mol/dm3) were used in the experiments. Zeta potential was shown to depend on surface chemistry, polarity, roughness and morphology of the polymer foils.

scholarly journals Electrochemical Characterization of Cellulose Acetate Butyrate-Prmutit Composite Membrane in Aqueous Uni-Uni Valent Electrolyte Solutions

2015 ◽  
Vol 3 (2) ◽  
pp. 337-341
Author(s):  
A.K. Tiwari ◽  
R. Sonkar ◽  
P.K. Tiwari
Keyword(s):  
Membrane Potential ◽  
Cellulose Acetate ◽  
Electrolyte Solutions ◽  
Cellulose Acetate Butyrate ◽  
Water Flooding ◽  
Time Data ◽  
Fixed Charge Density ◽  
Electrochemical Parameters ◽  
Acetate Butyrate

Co-mixed cellulose acetate butyrate and permutit in a definite composition was prepared and coded as MRS-2. The membrane potential was measured with uni-uni valent electrolyte, NaCl solutions using saturated calomel electrodes (SCEs).The effective fixed charge density of the membrane was determined by TMS method and it showed dependence on the porosity, charge on the membrane matrix, charge and size of permeating ions. Other important electrochemical parameters were calculated. Conductance-time data were generated for the kinetic study of the permeating ions in terms of membrane permeability, flow and flux parameters. Donnan membrane equilibrium condition was examined. Membrane adsorbability showed concave dependence with external electrolyte solution and convex type dependence was showed by swelling and conductance parameters. This membrane had no characteristic of anomalous osmosis, indicates that there is no water flooding will take place during membrane operation.Int J Appl Sci Biotechnol, Vol 3(2): 337-341 DOI: http://dx.doi.org/10.3126/ijasbt.v3i2.12748 

A Generic and Updatable Pitzer Characterization of Aqueous Binary Electrolyte Solutions at 1 bar and 25 °C

2011 ◽  
Vol 56 (12) ◽  
pp. 5066-5077 ◽  
Author(s):  
Peter M. May ◽  
Darren Rowland ◽  
Glenn Hefter ◽  
Erich Königsberger
Keyword(s):  
Electrolyte Solutions

Electrochemical Synthesis of Aluminum Nitride in Liquid Ammonia Electrolyte Solutions

1992 ◽  
Vol 271 ◽  
Author(s):  
Travis Wade ◽  
Jongman Park ◽  
Gene Garza ◽  
Claudia B. Ross ◽  
Douglas M. Smith ◽  
...  
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Electrolyte Solutions ◽  
Processing Parameters ◽  
Constant Current ◽  
Polymer Precursor ◽  
Solid Mixture ◽  
Before And After ◽  
Ceramic Precursors

ABSTRACTAn electrochemical method for the preparation of high purity metal nitride ceramic precursors is described. Constant current electrolysis of an electrolyte solution containing NH3 and NH4Br at an Al electrode yields a solid mixture consisting of Al(NH3)6Br3 and [Al(NH2)(NH)]n after evaporation of excess NH3. Calcination of this mixture above 800 C in flowing NH3 results in sublimation of Al(NH3)6Br3 and conversion of the ceramic polymer precursor, [Al(NH2)(NH)]n, to pure, high surface area AlN. Here we discuss some electrochemical aspects of the polymer precursor synthesis, precursor processing parameters, and materials characterization of the AlN powder before and after sintering.

Tribological Characterization of Porous TiO2 Coatings Produced by Electrodeposition

2011 ◽  
Vol 493-494 ◽  
pp. 430-435
Author(s):  
E. Santos ◽  
S.S. Camargo ◽  
G.A. Soares ◽  
Neide K. Kuromoto
Keyword(s):  
Electrolyte Solutions ◽  
Wear Volume ◽  
Oxide Coatings ◽  
Porous Ti ◽  
The Coefficient Of Friction ◽  
Dry Conditions ◽  
Anodic Oxidation Method ◽  
Tribological Characterization ◽  
Scratch Tests

In this work, the resistance to scratch and wear (pin-on-flat) tests of five different porous TiO2 films were compared. Such tribological tests were carried out under dry conditions. The coatings were electrodeposited on commercially pure-Ti by anodic oxidation method in different electrolyte solutions at constant voltages. The scratch tests were conducted by applying increasing normal loads up to 400 mN. The coefficient of friction (COF) varied from 0.2 up to 0.5, and increased at larger penetrations depths. When the electrolyte concentration was changed from 0.5 into 1.0M H2SO4, the COF slightly decreased. Scanning electron microscopy indicated that the coatings produced in H2SO4/150V and Na2SO4/100V did not have their substrates revealed. In addition, the samples anodized in H2SO4/150V had the highest elastic recoveries. Therefore, such coatings seem to be more resistant to scratch tests than the others. The wear tests were carried out with Berkovich tip as counter-face under constant normal loads of 10 mN in 10 forward-backward cycles. The coatings deposited in H2SO4/150V had the lowest wear volume rates. The findings suggest that the porous Ti oxide coatings electrodeposited above their rupture voltages are more suitable to both scratch- and wear-resistance compared to those prepared at the lowest voltage (H2SO4/100V).

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