scholarly journals Influence of aluminum and iron on zinc deposition from highly concentrated solutions.

2020 ◽  
Vol 11 (3-2020) ◽  
pp. 81-84
Author(s):  
A. N. Shcherbakova ◽  
◽  
T. K. Ivanova ◽  
I. P. Kremenetskaya ◽  
◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Thermodynamic Modeling ◽  
Significant Influence ◽  
Zinc Sulfate ◽  
Concentrated Solutions ◽  
Basic Salt ◽  
Zinc Deposition ◽  
Sulfate Solutions ◽  
Carbonate Hydroxide

The paper presents the results of experimental and thermodynamic modeling of the interaction of magnesium oxide with zinc sulfate solutions, including in the presence of iron and aluminum. It has been shown that depending on the conditions, zinc is deposited as anoxide, carbonate, hydroxide, and basic salt. Iron and aluminum have a significant influence on the deposition of zinc.

The Effects of Hydrogen on Properties of Surface Films Formed on Iron in Sulfate Solutions

2014 ◽  
Vol 936 ◽  
pp. 1120-1124 ◽  
Author(s):  
Ahsan Ejaz ◽  
Zhan Peng Lu ◽  
Jun Jie Chen ◽  
Xiao Feng Xia ◽  
Qian Xiao ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Morphology ◽  
Oxide Film ◽  
Open Circuit Potential ◽  
Pure Water ◽  
Open Circuit ◽  
Surface Films ◽  
Concentrated Solutions ◽  
Sulfate Solutions ◽  
Corrosion Of Iron

The effects of charged hydrogen in iron on surface properties of iron in pure water and sodium sulfate solutions of various concentrations were investigsted by open circuit potential monitoring, surface morphology observations, Raman spectroscopy and XRD measurements. Hydrogen in iron shifed the open circuit potential in the negative directions. Hydrogen could change the types of oxide film on iron. Effects of hydrogen on corrosion of iron was More significant in pure water and dilute sodium solutions than those in concentrated solutions.

Purification of zinc sulfate solutions from cobalt and nickel through activated cementation

2004 ◽  
Vol 73 (1-2) ◽  
pp. 163-168 ◽  
Author(s):  
Boyan S. Boyanov ◽  
Victoria V. Konareva ◽  
Nikolai K. Kolev
Keyword(s):  
Zinc Sulfate ◽  
Sulfate Solutions ◽  
Cobalt And Nickel

scholarly journals ELECTROPHYSICAL PROPERTIES OF ZINC SULFATE SOLUTIONS IN PRESENCE OF WATER DISPERSION OF MULTI-LAYERED CARBON NANOTUBES

2018 ◽  
Vol 61 (12) ◽  
pp. 115-121
Author(s):  
Evgeniy S. Vavilov ◽  
Alexandr I. Biryukov ◽  
Igor N. Kovalev ◽  
Alexandr V. Tolchev
Keyword(s):  
Carbon Nanotubes ◽  
Zinc Sulfate ◽  
Carbon Nanomaterials ◽  
Reaction System ◽  
Electrophysical Properties ◽  
Electron Conduction ◽  
Sulfate Solutions ◽  
Zinc Electrolyte ◽  
Ph Level ◽  
Solution Changes

Multi-layered carbon nanotubes were synthesized via hydrocarbons pyrolysis method in the presence of argon overpressure in the reaction system. With the use of the scanning electron microscope method, a morphology of the obtained materials were investigated. Synthetized nanotubes were modified by treating with solutions of various reagents: sodium hydroxide (10 mass. %), azotic (40 mass. %) and perchloric (40 mass. %) acids, chloroform. The sample was placed in the reagent solution with the volume of 10 ml and exposed for 24 h. Electrophysical investigation of multi-layered carbon nanotubes dispersions with zinc sulfate additions was carried with the use of the impedance meter Z - 1500J in a range of frequencies of 10 Hz - 2 MHz. It was found that the carbon nanomaterials effect on the electrophysical properties of zinc electrolyte. A change in electrical conductivity of zinc sulfate solutions with the addition of multi-layered carbon nanotubes with various morphology and surface modifications was studied. With the use of impedance spectroscopy method, there were examined the electrophysical properties of zinc electrolyte with additions of carbon nanotubes in the presence of various components concentration and pH level of the environment, that was obtained via the original technique. It is shown that electron conduction increases with the rise of nanotubes concentration, but substantially levels with the rise of zinc sulfate concentration. Moreover, insertion of multi-layered carbon nanotubes in the solution changes a state of equivalent circuit and its elements. It is concluded that insert of multi-layered carbon nanotubes has unambiguous impact on the electrophysical properties of zinc sulfate solutions. Based on the obtained data, a scheme of electrolyte and nanotubes interaction is offered.  

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