Morphology and composition of Zn–Ni alloy obtained from sulphate bath containing complexing agent

2020 ◽  
Vol 98 (3) ◽  
pp. 138-143
Author(s):  
H. Faid ◽  
J. C. Galvan
Keyword(s):  
Complexing Agent ◽  
Ni Alloy ◽  
Sulphate 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.

scholarly journals Influence of additives on electrodeposition of bright Zn-Ni alloy on mild steel from acid sulphate bath

2007 ◽  
Vol 30 (5) ◽  
pp. 455-462 ◽  
Author(s):  
S. Shivakumara ◽  
U. Manohar ◽  
Y. Arthoba Naik ◽  
T. V. Venkatesha
Keyword(s):  
Mild Steel ◽  
Acid Sulphate ◽  
Ni Alloy ◽  
Sulphate Bath

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.

The Influence of Complexing Agent to the Function of Electroless Plating of P-Ni Alloy on Magnesium Alloy

2010 ◽  
Vol 146-147 ◽  
pp. 327-330
Author(s):  
Yan Fang Chen ◽  
Xue Tao Yu ◽  
Yan Jie Qi ◽  
Ming Yue Ma ◽  
Qing Hua Chang
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Electroless Plating ◽  
Sodium Citrate ◽  
Complexing Agent ◽  
Az31b Magnesium Alloy ◽  
Ni Alloy ◽  
The Matrix ◽  
Buffering Agent ◽  
Scanning Electron

To improve the corrosion resistance and wear resistance of AZ31B magnesium alloy, in this dissertation, we use the method making AZ31B magnesium alloy as the matrix to make coating on the way of electroless plating nickel-phosphor directly. In this study, we make experiments on the influence of concentration of complexing agent in electroplating to electroless plating on the surface of magnesium alloy. We utilize the scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and the detection of corrosion resistance etc. To analyze the morphology, composition and corrosion resistance of coating. We come to a conclusion that the reaction is at the soonest when we adopt sodium citrate as buffering agent and its density is10ml/L., meanwhile, the coating particle is tiny and is well-knit with matrix. What’s more, phosphorus contents are maximum and the corrosion resistance is greatest.

scholarly journals Electrodeposition of Zn-Ni Alloy from Alkaline Sulphate Bath Triethanolamine and Mercaptopyridine

2020 ◽  
Vol 6 (1) ◽  
pp. 188-191
Author(s):  
V. Narasimhamurthy ◽  
L.H. Shivashankarappa
Keyword(s):  
Nickel Alloy ◽  
Current Density ◽  
Metal Ion ◽  
Nickel Content ◽  
High Hardness ◽  
Good Adhesion ◽  
Regular Type ◽  
Ni Alloy ◽  
Alloy Deposit ◽  
Sulphate Bath

Electrodeposition of Zn-Ni alloy from non-cyanide alkaline sulphate bath containing triethanolamine (TEA) and mercaptopyridine (MPY) under optimized plating conditions such as bath pH, temperature current density and metal ion ratio in the bath produced an alloy deposit with the desired composition of 10-15 %wt. of nickel, alloy of this composition showed good adhesion, high hardness pore free, smooth, uniform and finer grained. Deposition potentials of Zn-Ni alloy lie between the potentials of individual metals. Increase in temperature density decreased the nickel content in the alloy deposit, which with increase in temperature and thickness of the alloy deposit increased nickel content in the alloy deposit. Alloy deposition followed a regular type of co-deposition.

scholarly journals Physico-Chemical Properties of Zn-Ni Alloy Deposits from an Acid Sulphate Bath Containing Ethanolamines

2020 ◽  
Vol 6 (1) ◽  
pp. 184-187
Author(s):  
V. Narasimhamurthy ◽  
L.H. Shivashankarappa
Keyword(s):  
Current Density ◽  
Nickel Content ◽  
Chemical Properties ◽  
Plating Bath ◽  
Acid Sulphate ◽  
Physico Chemical ◽  
Ni Alloy ◽  
Alloy Deposit ◽  
Sulphate Bath ◽  
Composition Properties

The composition, properties, structure and morphology of electrodeposited Zn-Ni alloy deposits obtained from an acid sulphate bath have been investigated. A bath having higher percentage of nickel (50%) produced an alloy deposit with low percentage of nickel (12%), the percentage of nickel in the alloy deposit increases with current density up to 40 A.dm-2, with further increase in current density, the percentage of nickel shows a downward trend, increase in temperature of the plating bath increases the percentage of nickel in the alloy deposit. The hardness of the alloy deposits increases with increase in nickel content in the alloy, the phase structure of alloy deposit shows the presence of α, η, δ and γ phases. The morphology of Zn-Ni alloy deposits shows uniform and finer grained structure.

Sign in / Sign up

Export Citation Format

Share Document