Electrochemical studies of Zn–Ni alloy coatings from non-cyanide alkaline bath containing tartrate as complexing agent

2008 ◽  
Vol 202 (13) ◽  
pp. 2897-2904 ◽  
Author(s):  
M.G. Hosseini ◽  
H. Ashassi-Sorkhabi ◽  
H.A.Y. Ghiasvand
Keyword(s):  
Complexing Agent ◽  
Electrochemical Studies ◽  
Ni Alloy ◽  
Alkaline Bath

scholarly journals Effect of Additives on Electrodeposition of Zinc-Nickel Alloy On Mild Steel

2019 ◽  
Vol 31 (4) ◽  
pp. 891-895
Author(s):  
Dinesh Kumar Chelike ◽  
K. Juliet Gnana Sundari
Keyword(s):  
Corrosion Resistance ◽  
Mild Steel ◽  
Electrochemical Impedance ◽  
Corrosion Behaviour ◽  
Alloy Coating ◽  
Complexing Agent ◽  
Tafel Polarization ◽  
Good Corrosion Resistance ◽  
Ni Alloy ◽  
Strong Candidate

Considering the good corrosion resistance of Zn-Ni alloy, it is selected in the present study to be the protective coating on mild steel and it is considered as a strong candidate for the replacement of environmentally hazardous cadmium. Zn-Ni alloy coating is applied by electrodeposition at optimum temperature, current density and time. The bath solution used is consisting of EDTA as complexing agent. The electrodeposition is also carried out with tartaric acid and benzaldehyde additives to have good corrosion resistance and brightness. The electrodeposits obtained with and without additives are examined for nature and alloy composition. The corrosion behaviour of the electrodeposits is studied by Tafel polarization and electrochemical impedance spectroscopy.

INVESTIGATION OF SOME PROPERTIES OF ZINC-NICKEL ALLOY PLATING WITH TRIETHANOLAMINE, p-AMINOBENZENESULFONIC ACID, AND GELATINE

2020 ◽  
Vol 27 (12) ◽  
pp. 2050018
Author(s):  
AHMET OZAN GEZERMAN
Keyword(s):  
Corrosion Resistance ◽  
Nickel Alloy ◽  
Complexing Agent ◽  
X Ray ◽  
Ni Alloys ◽  
Ni Alloy ◽  
Alloy Plating ◽  
Zinc Nickel

Anticorrosion requirements for the metallurgy, automotive, and aeronautical industries have increased in recent years, for which alternative plating chemicals must be developed. This study focuses on obtaining a Zn-Ni alloy plating with higher corrosion resistance and brightness. For this purpose, tetraethylenepentaamine as complexing agent, triethanolamine as the surfactant, and gelatin and [Formula: see text]-aminobenzenesulfonic acid as brightening agents for the plating were selected and their optimal concentrations were determined for applications. The optimal Zn-Ni ratio and plating thickness were analyzed using an X-ray Dal device. Improved plating performance of the Zn-Ni alloys was achieved with a Zn-Ni alloy containing 12–14% Ni.

Effect of Triethanolamine Addition in Alkaline Bath on the Electroplating Behavior, Composition and Corrosion Resistance of Zn-Ni Alloy Coatings

2013 ◽  
Vol 738 ◽  
pp. 87-91 ◽  
Author(s):  
Jin Ming Long ◽  
Xiu Zhang ◽  
He Zhong Pei
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
Nickel Content ◽  
Deposition Potential ◽  
Molar Ratio ◽  
Complexing Agents ◽  
Plating Bath ◽  
Ni Alloy ◽  
Alkaline Bath

Zn-Ni alloy coatings were electrodeposited on low carbon steel substrate using a cyanide-free alkaline bath containing tetraethylenepentamine (TEPA) and triethanolamine (TEA) as complexing agents for Ni2+cations. Effect of TEA/Ni2+molar ratio on electrodeposition behavior, micromophology, Ni content and corrosion resistance of coatings were studied by means of SEM/EDS, polarization curve and electrochemical impedance spectroscopy (EIS), respectively. It was found that the deposition potential and elecctrochemical impedance of the cathode sample during the electrodeposition was influenced by the TEA/Ni2+molar ratio (TNmr) in the bath. The deposition potential shifts negatively and the impedance rises with increasing TNmrup to 2. The nickel content in Zn-Ni deposit was varied in a range from 16.81 to 19.04 wt.%. The dependence of cathodic current efficiency and depositing velocity of the coating on TNmrof plating bath were also determined. A fine-grained and smooth-faced coating was obtained at TNmr=2, which exhibited the highest corrosion resistance in 3.5% NaCl environment.

Electrochemical studies with a Cu–5wt.%Ni alloy in 0.5 M H2SO4

2003 ◽  
Vol 48 (19) ◽  
pp. 2791-2798 ◽  
Author(s):  
M.R.F. Hurtado ◽  
P.T.A. Sumodjo ◽  
A.V. Benedetti
Keyword(s):  
Electrochemical Studies ◽  
Ni Alloy

Electrochemical studies of 2-aminopyridine on nanocrystalline Zn Ni alloy electrodeposition

2019 ◽  
Vol 835 ◽  
pp. 114-122 ◽  
Author(s):  
Zhongbao Feng ◽  
Lin Wang ◽  
Dagang Li ◽  
Qiang Sun ◽  
Pengfei Xing ◽  
...  
Keyword(s):  
Electrochemical Studies ◽  
Alloy Electrodeposition ◽  
Ni Alloy

Effect of C6H4SO2NNaCO•2H2O on Microstructure and Electrochemical Properties of Electrodeposited La-Mg-Ni Alloys

2012 ◽  
Vol 602-604 ◽  
pp. 570-574
Author(s):  
Jin Yu ◽  
Jing Zhou ◽  
Li Wei Wang
Keyword(s):  
Cathodic Polarization ◽  
Film Surface ◽  
Nickel Chloride ◽  
Alloy Film ◽  
Complexing Agent ◽  
Film Resistor ◽  
Activation Free Energy ◽  
Ni Alloys ◽  
Ni Alloy ◽  
Absorption Level

With lanthanum, magnesium and nickel chloride as the main salt, citric acid (C3H8O7•H2O) as a complexing agent, La-Mg-Ni storage materials were prepared by galvanostatic electrodeposition method in aqueous solution. The effect of additive C6H4SO2NNaCO•2H2O on the properties of electrodeposited alloy film was studied. The results showed that: adding appropriate amount of C6H4SO2NNaCO•2H2O may be effective in improving the surface morphology of the La-Mg-Ni alloy film, and be more conducive to the formation of LaMg2Ni9alloy phase; when the dosage was 0.20g/L, the cathodic polarization of the bath was the strongest, and cracks and pores were the least on the alloy film surface prepared by electro-deposited, the apparent activation free energy of alloy film was 48.2 kJ/mol, electrode absorption level Q was 0.030μF/cm2, the alloy film resistor Rd was 138.5Ω/cm2.

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