ATR FTIR study of levellers for Cu electrodeposition from acidic sulphate solution

2008 ◽  
Vol 86 (1) ◽  
pp. 41-50 ◽  
Author(s):  
B. Bozzini ◽  
L. D'Urzo ◽  
S.-J. Huo ◽  
W.-B. Cai
Keyword(s):  
Sulphate Solution ◽  
Ftir Study ◽  
Acidic Sulphate Solution ◽  
Acidic Sulphate

Characteristics of Potentiodynamic Polarization Curves of Aluminum Electrodeposion Coating in Acidic Sulphate Solution

2011 ◽  
Vol 239-242 ◽  
pp. 620-623
Author(s):  
Zhi Min Ding ◽  
Chang Bin Shen ◽  
Jun Shi Guan ◽  
Hong Gao
Keyword(s):  
Potentiodynamic Polarization ◽  
Steel Substrate ◽  
Pure Aluminum ◽  
Sulphate Solution ◽  
Current Oscillation ◽  
Polarization Curves ◽  
Diffusion Treatment ◽  
Potentiodynamic Polarization Curves ◽  
Acidic Sulphate Solution ◽  
Acidic Sulphate

The density and anodic potentiodynamic polarization (PDP) in different diluted acidic sulphate solution of the aluminum electrodeposion coating on Q235 steel substrate, obtained in the molten salt of AlCl3,NaCl and KCl and treated by diffusion treatment, have been investigated. The results indicated that with the increase of temperature of diffusion treatment, the dencity of the coatings increases first, then reduces little. At 500°C, the dencity is biggest, 2.76g/cm3, which is almost equal to that of compact pure aluminum. As-received coating displays a current oscillation behavior on the anodic potentiodynamic polarization curves in different diluted acidic sulphate solution . And with the increase of diffusion temperature, the current oscillation behaviors donated by the current oscillation domains in solution of 180g/L H2SO4 gradually disappeared. When the temperature is up to 500°C and 700°C, no current oscillation phenomena can be observed. Based on these phenomena, a mode between the porosity of the coating, which was affected by the temperature of diffusion treatment, and current oscillation behaviors was roughly established.

Electrochemical oxidation of WC in acidic sulphate solution

2004 ◽  
Vol 46 (2) ◽  
pp. 453-469 ◽  
Author(s):  
Benedetto Bozzini ◽  
Gian Pietro De Gaudenzi ◽  
Ameriga Fanigliulo ◽  
Claudio Mele
Keyword(s):  
Electrochemical Oxidation ◽  
Sulphate Solution ◽  
Acidic Sulphate Solution ◽  
Acidic Sulphate

Study on levellers for Cu electrodeposition from acidic sulphate solution: anin situspectroelectrochemical approach

2006 ◽  
Vol 84 (4) ◽  
pp. 177-187 ◽  
Author(s):  
B. Bozzini ◽  
C. Mele ◽  
L. D'Urzo ◽  
V. Romanello ◽  
G. Giovannelli
Keyword(s):  
Sulphate Solution ◽  
Acidic Sulphate Solution ◽  
Acidic Sulphate

Alkylpyridinium Hydrosulfate Ionic Liquids as Novel Additives for Zinc Electrodeposition

2013 ◽  
Vol 634-638 ◽  
pp. 140-144 ◽  
Author(s):  
Qi Bo Zhang ◽  
Yi Xin Hua ◽  
Li Yuan Chen
Keyword(s):  
Ionic Liquids ◽  
Surface Morphology ◽  
Crystallographic Orientation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zinc Electrodeposition ◽  
Inhibiting Effect ◽  
Voltammetric Studies ◽  
Acidic Sulphate Solution ◽  
Acidic Sulphate

The effects of three novel alkylpyridinium hydrosulfate ionic liquids (ILs)-EpyHSO4, BpyHSO4 and HpyHSO4 on current efficiency (CE), energy consumption (EC), catholic polarization behavior, surface morphology and crystallographic orientation during zinc electrodeposition from acidic sulphate solution were investigated. Addition of these additives was found to increase CE, decrease EC and improve the surface morphology at lower concentrations. Voltammetric studies indicated that these additives had a pronounced inhibiting effect on Zn2+ electroreduction and polarization of the electrode was in the order: HpyHSO4 > BpyHSO4 > EpyHSO4. X-ray diffraction analysis revealed that the presence of additives did not change the structure of the electrodeposited zinc but affected the crystallographic orientation of the crystal planes.

Inhibition of copper corrosion in acidic sulphate media by eco-friendly amino acid compound

2014 ◽  
Vol 68 (3) ◽  
Author(s):  
Ana Simonović ◽  
Marija Petrović ◽  
Milan Radovanović ◽  
Snežana Milić ◽  
Milan Antonijević
Keyword(s):  
Corrosion Inhibitor ◽  
Open Circuit ◽  
Sodium Sulphate ◽  
Copper Electrode ◽  
Sulphate Solution ◽  
Protective Film ◽  
Copper Corrosion ◽  
Sulphate Media ◽  
Acid Compound ◽  
Acidic Sulphate

AbstractThis investigation aimed to study a “green” non-toxic biodegradable copper corrosion inhibitor in an acidic sodium sulphate solution. The methods used in the investigation of cysteine as a copper corrosion inhibitor in an acidic sodium sulphate solution were: potentiodynamic measurements, open circuit potential measurements, and chronoamperometric measurements. Optical microscopy was used in addition to electrochemical methods. Potentiodynamic measurements show that cysteine has good inhibitory properties in an acidic medium. Polarisation curves indicate that the presence of cysteine in a sulphate solution decreases the current density and that using various cysteine concentrations results in the formation of a protective film on the surface of the electrode due to the formation of the Cu(I)-cys complex. These results are confirmed by chronoamperometric measurements. Furthermore, it is clear from microphotographs that a protective film does form on copper electrode in the presence of cysteine. The Langmuir adsorption isotherm indicates that cysteine is chemisorbed on the surface of the electrode.

scholarly journals Synthesis and characterization of tenorite (CuO) nanoparticles from smelting furnace dust(SFD)

2013 ◽  
Vol 49 (1) ◽  
pp. 21-26 ◽  
Author(s):  
E. Darezereshki ◽  
F. Bakhtiari
Keyword(s):  
Electron Microscopy ◽  
Average Diameter ◽  
Cuo Nanoparticles ◽  
Smelting Furnace ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Tenorite Nanoparticles ◽  
Acidic Sulphate Solution ◽  
Acidic Sulphate

Tenorite (CuO) nanoparticles were prepared from a dilute CuSO4 solution. The solution was obtained by leaching (pH=1.5) of smelting furnace dust of Sarcheshmeh Copper Complex, Iran. The recovery of copper from the acidic sulphate solution was carried out by solvent extraction using Lix 984-N. Tenorite nanoparticles were synthesized by direct thermal decomposition of Langite [Cu4(OH)6SO4(H2O)2] as a precursor which was calcinated in air for 2 h at 750?C. The Samples were characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy. The average diameter of the spherical pure CuO nanoparticles and their crystallite size were estimated to be 92 nm and 40nm, respectively. The simplicity of the present method suggests its potential application at industrial scale as a cheap and convenient way to produce pure CuO nanoparticles from dilute CuSO4 solutions obtained from leaching of smelting furnace dust.

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