Study of the effect of new brightener on Zn–Ni alloy electrodeposition from acid sulphate bath

2011 ◽  
Vol 41 (5) ◽  
pp. 535-541 ◽  
Author(s):  
S. Basavanna ◽  
Y. Arthoba Naik
Keyword(s):  
Alloy Electrodeposition ◽  
Acid Sulphate ◽  
Ni Alloy ◽  
Sulphate Bath

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

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.

scholarly journals New Brightener for Zn-Fe Alloy Plating from Sulphate Bath

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
B. M. Praveen ◽  
T. V. Venkatesha
Keyword(s):  
Grain Size ◽  
Metal Ion ◽  
Condensation Product ◽  
Spectroscopic Studies ◽  
Sem Images ◽  
Alloy Electrodeposition ◽  
Fine Grained ◽  
Polarization Studies ◽  
Uv Visible ◽  
Sulphate Bath

Zn-Fe alloy electrodeposition was carried out in the presence of condensation product 2-{[(1E)-(3,4-dimethoxyphenyl)methylidene]amino}-3-hydroxypropanoic acid formed between veratraldehyde and serine in acid sulphate bath. Hull cell was used for optimizing the operating parameters and bath constituents. During deposition, the potential was shifted towards cathodic direction in the presence of addition agents and brightener. The polarization studies show that deposition taking place in basic bath and optimum bath was 1.08 and 1.15 V, respectively. Current efficiency and throwing power were reached around 85% and 26%, respectively. The SEM images of bright deposit indicated its fine-grained nature and appreciable reduction in the grain size. XRD studies have showed that the grain size of the deposit generated from optimum bath was 16 nm. UV-visible spectroscopic studies confirm the formation of complex between metal ion and brightener.

scholarly journals ANOMALOUS ELECTRODEPOSITION OF Fe-Ni ALLOY COATING FROM SIMPLE AND COMPLEX BATHS AND ITS MAGNETIC PROPERTY

2010 ◽  
Vol 10 (2) ◽  
pp. 108-122 ◽  
Author(s):  
M A Islam
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Magnetic Property ◽  
Current Density ◽  
Coarse Grained ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Alloy Electrodeposition ◽  
Ni Alloys ◽  
Ni Alloy

Electrodeposition of Fe-Ni thin films has been carried on copper substrate under various electrodeposition conditions from two simple and six complex baths. Sulfate baths composing of NiSO4. 7H2O, FeSO4.7H2O, H3BO3 and Na2SO4KEYWORDS: Anomalous Electrodeposition, Fe-Ni Coating, Complexing agent, Current Density, Magnetic Property. 1. INTRODUCTION Alloy electrodeposition technologies can extend tremendously the potential of electrochemical deposition processes to provide coatings that require unique mechanical, chemical and physical properties [1]. There has been a great research interest in the development and characterization of iron-nickel (Fe-Ni) thin films due to their operational capacity, economic interest, magnetic and other properties [2]. Due to their unique low coefficient of thermal expansion (CTE) and soft magnetic properties, Fe-Ni alloys have been used in industrial applications for over 100 years [3]. Typical examples of applications that are based on the low CTE of Fe-Ni alloys include: thermostatic bimetals, glass sealing, integrated circuit packaging, cathode ray tube, shadow masks, membranes for liquid natural gas tankers; applications based on the soft magnetic properties include: read-write heads for magnetic storage, magnetic actuators, magnetic shielding, high performance transformer cores. comprise the simple baths whereas complex baths were prepared by adding ascorbic acid, saccharin and citric acid in simple baths. The effect of bath composition, pH and applied current density on coating appearance, composition, morphology and magnetic property were studied. Wet chemical analysis technique was used to analyze the coating composition whereas SEM and VSM were used to study the deposit morphology and magnetic property respectively. Addition of complexing agents in plating baths suppressed the anomalous nature of Fe-Ni alloy electrodeposition. Coatings obtained from simple baths were characterized by coarse grained non-smooth surface with/without microcracks onto it whereas those from complex baths were fine grained with smooth surfaces. Satisfactory saturation magnetization value of 131.13 emu/g in coating was obtained from simple bath. Coatings obtained from complex baths did not show normal magnetization behavior.

scholarly journals MORPHOLOGY AND PROPERTIES OF ELECTRODEPOSITED ZN-NI ALLOY COATINGS ON MILD STEEL

1970 ◽  
Vol 40 (1) ◽  
pp. 9-14 ◽  
Author(s):  
M J Rahman ◽  
S R Sen ◽  
M Moniruzzaman ◽  
K M Shorowordi
Keyword(s):  
Corrosion Resistance ◽  
Mild Steel ◽  
Current Density ◽  
Perfect Crystal ◽  
Corrosion Property ◽  
Alloy Electrodeposition ◽  
Sulfate Bath ◽  
Ni Alloy ◽  
Electrochemically Deposited ◽  
A Current

Zinc-nickel alloys electrochemically deposited on mild steel under various deposition conditions were investigated. The effect of plating variables (bath composition, pH, current density) on the coating composition, morphology, corrosion property and microhardness were investigated. Modified morphology with perfect crystal growth, uniform arrangement of crystals, refinement in crystal size and hence bright deposit was obtained from sulfate Bath-3 containing 30 g/l H3BO3 at a current density of 75 mA/cm2. Corrosion resistance as well as microhardness of Zn-Ni alloy coatings increased with the increase of %Ni in the deposit for all the sulphate baths studied. Optimum conditions for good deposition are also discussed. Keywords: Zn-Ni alloy, electrodeposition, morphology, corrosion resistance.   doi: 10.3329/jme.v40i1.3468 Journal of Mechanical Engineering, Vol. ME40, No. 1, June 2009 9-14

scholarly journals A Study on Laser Enhanced Electrodeposition for Preparation Fe-Ni Alloy

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3560
Author(s):  
Zhaoyang Zhang ◽  
Yucheng Wu ◽  
Anbin Wang ◽  
Kun Xu ◽  
Xueren Dai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
Laser Irradiation ◽  
Laser Energy ◽  
New Method ◽  
Micro Structure ◽  
Alloy Electrodeposition ◽  
Ni Alloy

In this paper, a method of laser enhanced electrodeposition is used for preparation of Fe-Ni alloy, which exhibits a significant advantage in fabrication of alloys. The effect of laser energy on Fe-Ni alloy electrodeposition by the manner of reciprocating scanning is studied. Results show that laser irradiation can improve the surface morphology, micro-structure and mechanical properties of Fe-Ni alloy. The results are useful for the development of a new method to synthesize Fe-Ni alloy with better properties.

Manufacturing Technology of μ-Gear and Mold by Fe-Ni Alloy Electroforming

2011 ◽  
Vol 291-294 ◽  
pp. 3032-3035
Author(s):  
Seong Ho Son ◽  
Won Sik Lee ◽  
Hong Kee Lee ◽  
Hyun Jong Kim ◽  
Sung Cheol Park
Keyword(s):  
Chemical Reaction ◽  
Reaction Rate ◽  
High Hardness ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Powder Injection ◽  
Alloy Electrodeposition ◽  
Temperature Range ◽  
Good Surface ◽  
Ni Alloy

The micro parts were fabricated by electroforming process of Fe-Ni alloy. Reaction mechanism of Fe-Ni alloy electrodeposition process was investigated using rotating disk electrode. To clarify the rate determining step, the activation energies of iron and nickel elements were calculated from the Arrhenius plot in the temperature range of 308K~328K. The reaction rate of iron in electrodeposition of Fe-Ni alloy was controlled by chemical reaction at temperature range of 308K~318K, while at range of 318K~328K, it was controlled by mass transport. The reaction rate of nickel was controlled by chemical reaction at 308K~318K and by a mixed mechanism of chemical reaction and mass transfer at 318K~328K. For alloy electroforming of micro gears and a mold for powder injection molding, the mandrels of micro gear (1.7mm in diameter and 600 μm in height) and micro mold (550 μm in diameter and 600 μm in height) were prepared by UV-lithography using SU-8 photoresist. Subsequently, Fe-Ni alloy micro gear mold were electroformed with high hardness (490 Hv) and very good surface roughness (Ra 37.5 nm).

scholarly journals Fe-Ni ALLOY ELECTRODEPOSITION FROM SIMPLE AND COMPLEX TYPE SULFATE ELECTROLYTES CONTAINING Ni/Fe RATIO OF 1 AND 12

2014 ◽  
Vol 44 (1) ◽  
pp. 51-56 ◽  
Author(s):  
M. Moniruzzaman ◽  
K.M. Shorowordi ◽  
A. Azam ◽  
M.F.N. Taufique
Keyword(s):  
Grain Size ◽  
Current Density ◽  
High Current Density ◽  
Complexing Agents ◽  
Alloy Electrodeposition ◽  
Fine Grained ◽  
Ni Alloy ◽  
Iron Nickel ◽  
High Degree ◽  
Density Results

Iron-nickel (Fe-Ni) alloy electrodeposition has been conducted from simple and complex baths having Ni/Fe ratio of 1 and 12. The applied current density varies from 30 to 100 mA/cm2. The coating composition, morphology and microhardness are measured and characterized by SEM/EDX and Shimadzu microhardness tester. The percentage of Ni in the coating increases with increasing current density and the Ni/Fe ratio of electrolytes which is supported by the alloy deposition principle. Fine grained and smooth coating without microcracking is obtained from the complex baths. Complexing agents are supposed to reduce the deposit stress developed during electrodeposition. Increase in Ni/Fe ratio in the bath as well as current density results in decreasing grain size of the deposits. High current density is believed to give rise to a high degree of adatoms at the electrode surface and high degree of adatoms decreases the grain size. Microhardness of the coating increases with the increase of bath Ni/Fe ratio as well as current density of electrodeposition. DOI: http://dx.doi.org/10.3329/jme.v44i1.19498

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