Electrolyte Pressure Influence on the Speed of Steel 110G13L Electrochemical Dissolution during Electrochemical Jet Machining

2014 ◽  
Vol 698 ◽  
pp. 321-325 ◽  
Author(s):  
Vasily Yanpolskiy ◽  
Boris Krasilnikov ◽  
Konstantin Rakhimyanov
Keyword(s):  
Experimental Investigation ◽  
Aqueous Solutions ◽  
Electrolyte Composition ◽  
Electrochemical Dissolution ◽  
Polarization Analysis ◽  
Steel 110G13l ◽  
Depth Increase ◽  
Feeding Pressure ◽  
110G13l Steel

An experimental investigation of an electrochemical dissolution of steel 110G13L (steel of Hadfield) in NaNO3, Na2SO4, and NaCl aqueous solutions was carried out. It has been found that the electrochemical dissolution of steel 110G13L in NaNO3, Na2SO4 aqueous solutions occurs in the active state when φ = 4.5 V. Based on the results of the polarization analysis and determination of the steel 110G13L dissolution depth in each of these solutions, the rational electrolyte composition was chosen for ECJM. The technologic experiment has shown that an increase in the electrolyte feeding pressure up to two МPа leads to a machining depth increase up to 600 μm.

X-ray fluorescence determination of zinc sulfate in acidic zinc plating electrolyte

2020 ◽  
Vol 86 (10) ◽  
pp. 18-22
Author(s):  
K. N. Vdovin ◽  
K. G. Pivovarova ◽  
N. A. Feoktistov ◽  
T. B. Ponamareva
Keyword(s):  
Zinc Sulfate ◽  
Zinc Coating ◽  
Electrolyte Composition ◽  
Complexometric Titration ◽  
X Ray ◽  
Fluorescence Determination ◽  
Zinc Plating ◽  
Zinc Determination

Zinc sulfate is the main component in the composition of the acidic zinc plating electrolyte. Deviation in the electrolyte composition from the optimum content leads to destabilization of the electrolysis process and deteriorate the quality of the resulting zinc coating. The proper quality of a zinc coating obtained by galvanic deposition can be ensured only with timely monitoring and adjustment of the electrolyte composition. A technique of X-ray fluorescence determination of zinc (in terms of zinc sulfate) in an acidic zinc plating electrolyte is proposed. The study was carried out using an ARL Quant’X energy dispersive spectrometer (Thermo Fisher Scientific, USA) with a semiconductor silicon-lithium detector. The features of the spectrometer design are presented. The optimal parameters of excitation and detection of zinc radiation were specified when the electrolyte sample was diluted 1:1000. The ZnKα1 line was used as an analytical line. The plotted calibration graph is linear, the correlation coefficient being 0.999234. The results of zinc determination according to the developed method were compared with the data of the reference method of complexometric titration to prove the reliability of the procedure. The results are characterized by good convergence and accuracy. The proposed method of X-ray fluorescence zinc determination in a zinc plating electrolyte equals complexometric titration in the limiting capabilities and even exceeds the latter in terms of the simplicity of sample preparation and rapidity. The developed method of X-ray fluorescence determination of zinc is implemented in analysis of the electrolyte used in the continuous galvanizing unit at «METSERVIS LLC».

LUMINESCENT DETERMINATION OF SUGAR IN NATURAL HONEY

2020 ◽  
Vol 0 (4) ◽  
pp. 29-32
Author(s):  
B.M. GAREEV ◽  
◽  
A.M. ABDRAKHMANOV ◽  
G.L. SHARIPOV ◽  
◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laboratory Test ◽  
Aqueous Solutions ◽  
Analytical Method ◽  
Sugar Content ◽  
Carbon Quantum Dots ◽  
Photoluminescence Intensity ◽  
Sucrose Content ◽  
Natural Honey

The photoluminescence of carbon quantum dots synthesized from natural honey and mixtures of honey and sugar has been studied. An increase in the sugar content leads to a decrease in the photoluminescence intensity without changing the shape of the luminescence spectrum of these quantum dots aqueous solutions, which is associated with a decrease in the yield of their synthesis in the sugar presence. The discovered effect can be used to detect sugar in honey. When examining five different market samples of flower honey using this method, two of them showed a significant decrease in the photoluminescence intensity. A laboratory test for compliance with GOST 19792-2017 Standard requirements established an excess of the sucrose content in these samples. Luminescent determination of sugar in honey does not require complicated equipment and can be used to develop a new analytical method for determining the sugar content in counterfeit natural honey.

Sorption of Lead by the Selective Ion Exchanger Ostsorb DETA

1992 ◽  
Vol 57 (7) ◽  
pp. 1393-1404 ◽  
Author(s):  
Ladislav Svoboda ◽  
Jan Uhlíř ◽  
Zdeněk Uhlíř
Keyword(s):  
Phosphoric Acid ◽  
Aqueous Solutions ◽  
Functional Groups ◽  
Ion Exchanger ◽  
Preconcentration Procedure ◽  
Bead Cellulose

The properties of Ostsorb DETA, a selective ion exchanger based on modified bead cellulose with chemically bonded diethylenetriamine functional groups, were studied, and its applicability to the preconcentration of trace amounts of lead from aqueous solutions was verified. The conditions of the preconcentration procedure in the column and batch modes were optimized for this purpose. The results obtained were applied to the determination of lead in phosphoric acid.

Experimental Investigation on the Quasi-Ballistic Transport: Part I—Determination of a New Backscattering Coefficient Extraction Methodology

2009 ◽  
Vol 56 (3) ◽  
pp. 408-419 ◽  
Author(s):  
Vincent Barral ◽  
Thierry Poiroux ◽  
JÉrÔme Saint-Martin ◽  
Daniela Munteanu ◽  
Jean-Luc Autran ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Ballistic Transport ◽  
Backscattering Coefficient ◽  
Transport Part
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