The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Jarem Raul Garcia - One of the best experts on this subject based on the ideXlab platform.
-
electrodeposition of zn and zn mn alloy coatings from an Electrolytic Bath prepared by recovery of exhausted zinc carbon batteries
Journal of Power Sources, 2012Co-Authors: Paulo Sérgio Cardoso Da Silva, Almir Spinelli, Edineia Sartori P Schmitz, Jarem Raul GarciaAbstract:Abstract The electrodeposition of galvanic coatings was performed using a chloride-based acidic Electrolytic Bath containing polyethylene glycol (PEG) as an additive. The Electrolytic Bath was prepared using Zn and Mn recovered from exhausted zinc–carbon batteries by means of acid leaching with HCl. The coatings were obtained potentiostatically at −1.2 V and −1.6 V (vs. Ag/AgCl) and galvanostatically with a current density of −10 mA cm −2 . The results indicated that the presence of PEG in the Bath during galvanostatic deposition favored the formation of a coating containing a mixture of Zn and Zn–Mn alloy with an Mn content of around 2 wt%.
-
Electrodeposition of Zn and Zn–Mn alloy coatings from an Electrolytic Bath prepared by recovery of exhausted zinc–carbon batteries
Journal of Power Sources, 2012Co-Authors: Paulo Sérgio Cardoso Da Silva, Edinéia P. Sartori Schmitz, Almir Spinelli, Jarem Raul GarciaAbstract:AbstractThe electrodeposition of galvanic coatings was performed using a chloride-based acidic Electrolytic Bath containing polyethylene glycol (PEG) as an additive. The Electrolytic Bath was prepared using Zn and Mn recovered from exhausted zinc–carbon batteries by means of acid leaching with HCl. The coatings were obtained potentiostatically at −1.2V and −1.6V (vs. Ag/AgCl) and galvanostatically with a current density of −10mAcm−2. The results indicated that the presence of PEG in the Bath during galvanostatic deposition favored the formation of a coating containing a mixture of Zn and Zn–Mn alloy with an Mn content of around 2wt%
Paulo Sérgio Cardoso Da Silva - One of the best experts on this subject based on the ideXlab platform.
-
electrodeposition of zn and zn mn alloy coatings from an Electrolytic Bath prepared by recovery of exhausted zinc carbon batteries
Journal of Power Sources, 2012Co-Authors: Paulo Sérgio Cardoso Da Silva, Almir Spinelli, Edineia Sartori P Schmitz, Jarem Raul GarciaAbstract:Abstract The electrodeposition of galvanic coatings was performed using a chloride-based acidic Electrolytic Bath containing polyethylene glycol (PEG) as an additive. The Electrolytic Bath was prepared using Zn and Mn recovered from exhausted zinc–carbon batteries by means of acid leaching with HCl. The coatings were obtained potentiostatically at −1.2 V and −1.6 V (vs. Ag/AgCl) and galvanostatically with a current density of −10 mA cm −2 . The results indicated that the presence of PEG in the Bath during galvanostatic deposition favored the formation of a coating containing a mixture of Zn and Zn–Mn alloy with an Mn content of around 2 wt%.
-
Electrodeposition of Zn and Zn–Mn alloy coatings from an Electrolytic Bath prepared by recovery of exhausted zinc–carbon batteries
Journal of Power Sources, 2012Co-Authors: Paulo Sérgio Cardoso Da Silva, Edinéia P. Sartori Schmitz, Almir Spinelli, Jarem Raul GarciaAbstract:AbstractThe electrodeposition of galvanic coatings was performed using a chloride-based acidic Electrolytic Bath containing polyethylene glycol (PEG) as an additive. The Electrolytic Bath was prepared using Zn and Mn recovered from exhausted zinc–carbon batteries by means of acid leaching with HCl. The coatings were obtained potentiostatically at −1.2V and −1.6V (vs. Ag/AgCl) and galvanostatically with a current density of −10mAcm−2. The results indicated that the presence of PEG in the Bath during galvanostatic deposition favored the formation of a coating containing a mixture of Zn and Zn–Mn alloy with an Mn content of around 2wt%
Almir Spinelli - One of the best experts on this subject based on the ideXlab platform.
-
electrodeposition of zn and zn mn alloy coatings from an Electrolytic Bath prepared by recovery of exhausted zinc carbon batteries
Journal of Power Sources, 2012Co-Authors: Paulo Sérgio Cardoso Da Silva, Almir Spinelli, Edineia Sartori P Schmitz, Jarem Raul GarciaAbstract:Abstract The electrodeposition of galvanic coatings was performed using a chloride-based acidic Electrolytic Bath containing polyethylene glycol (PEG) as an additive. The Electrolytic Bath was prepared using Zn and Mn recovered from exhausted zinc–carbon batteries by means of acid leaching with HCl. The coatings were obtained potentiostatically at −1.2 V and −1.6 V (vs. Ag/AgCl) and galvanostatically with a current density of −10 mA cm −2 . The results indicated that the presence of PEG in the Bath during galvanostatic deposition favored the formation of a coating containing a mixture of Zn and Zn–Mn alloy with an Mn content of around 2 wt%.
-
Electrodeposition of Zn and Zn–Mn alloy coatings from an Electrolytic Bath prepared by recovery of exhausted zinc–carbon batteries
Journal of Power Sources, 2012Co-Authors: Paulo Sérgio Cardoso Da Silva, Edinéia P. Sartori Schmitz, Almir Spinelli, Jarem Raul GarciaAbstract:AbstractThe electrodeposition of galvanic coatings was performed using a chloride-based acidic Electrolytic Bath containing polyethylene glycol (PEG) as an additive. The Electrolytic Bath was prepared using Zn and Mn recovered from exhausted zinc–carbon batteries by means of acid leaching with HCl. The coatings were obtained potentiostatically at −1.2V and −1.6V (vs. Ag/AgCl) and galvanostatically with a current density of −10mAcm−2. The results indicated that the presence of PEG in the Bath during galvanostatic deposition favored the formation of a coating containing a mixture of Zn and Zn–Mn alloy with an Mn content of around 2wt%
Ph Refait - One of the best experts on this subject based on the ideXlab platform.
-
electrodeposition of zn mn alloys on steel using an alkaline pyrophosphate based Electrolytic Bath
Surface & Coatings Technology, 2005Co-Authors: D Sylla, C Savall, M Gadouleau, C Rebere, J Creus, Ph RefaitAbstract:Abstract Electrodeposited coatings of zinc are commonly used to protect carbon steels from corrosion. However, this protection is not acceptable under severe atmospheric conditions and various alternative materials are investigated. Among those materials are the Zn–Mn alloys, which seem to display both improved corrosion resistance and environmental compatibility. The electrodeposition of Zn–Mn alloys from an alkaline Bath was achieved for the first time. The Bath consisted of dissolved Mn II SO 4 and Zn II SO 4 in a pyrophosphate+hydroxylamine matrix. Pyrophosphate was used as a necessary complexing agent to avoid the precipitation of Mn(II) and Zn(II) hydroxides whereas hydroxylamine was added to prevent oxidation of dissolved Mn(II) species by O 2 . The effects of the Zn(II)/Mn(II) ratio were studied, allowing to determine the optimal conditions for the electrodeposition. The redox processes involving Zn(II), Mn(II), and the components of the Bath were studied by cyclic voltammetry. The potentiostatically electrodeposited Zn–Mn films were finally investigated by means of scanning electron microscopy, energy dispersive X-ray spectrometry, and X-ray diffraction. They presented a cauliflower morphology and a Mn content up to ∼25 at.%. They were monophasic, constituted of the metastable ɛ-ZnMn phase, or biphasic ɛ-ZnMn+Zn ( η ) depending on the Mn content. The use of a commercial additive improved appreciably the appearance of the deposits and induced the formation of the stable γ-ZnMn phase.
M. Feki - One of the best experts on this subject based on the ideXlab platform.
-
Zn–Mn alloy coatings from acidic chloride Bath: Effect of deposition conditions on the Zn–Mn electrodeposition-morphological and structural characterization
Applied Surface Science, 2017Co-Authors: N. Loukil, M. FekiAbstract:Abstract Zn–Mn alloy electrodeposition on steel electrode in chloride Bath was investigated using cyclic voltammetric, chronopotentiometric and chronoamperometric techniques. Cyclic voltammetries (CV) reveal a deep understanding of electrochemical behaviors of each metal Zn, Mn, proton discharge and Zn–Mn co-deposition. The electrochemical results show that with increasing Mn 2+ ions concentration in the Electrolytic Bath, Mn 2+ reduction occurs at lower over-potential leading to an enhancement of Mn content into the Zn–Mn deposits. A dimensionless graph model was used to analyze the effect of Mn 2+ ions concentration on Zn–Mn nucleation process. It was found that the nucleation process is not extremely affected by Mn 2+ concentration. Nevertheless, it significantly depends on the applied potential. Several parameters such as Mn 2+ ions concentration, current density and stirring were investigated with regard to the Mn content into the final Zn–Mn coatings. It was found that the Mn content increases with increasing the applied current density j imp and Mn 2+ ions concentration in the Electrolytic Bath. However, stirring of the solution decreases the Mn content in the Zn–Mn coatings. The phase structure and surface morphology of Zn–Mn deposits are characterized by means of X-ray diffraction analysis and Scanning Electron Microscopy (SEM), respectively. The Zn–Mn deposited at low current density is tri-phasic and consisting of η-Zn, ζ-MnZn 13 and hexagonal close packed e-Zn–Mn. An increase in current density leads to a transition from crystalline to amorphous structure, arising from the hydroxide inclusions in the Zn–Mn coating at high current density.