scholarly journals Electrochemical deposition and characterization of zinc-nickel alloys deposited by direct and pulse current

2002 ◽  
Vol 67 (8-9) ◽  
pp. 625-634 ◽  
Author(s):  
Jelena Bajat ◽  
Miodrag Maksimovic ◽  
Goran Radovic
Keyword(s):  
Electrochemical Deposition ◽  
Phase Structure ◽  
Nickel Alloys ◽  
Pulse Current ◽  
Rotating Disc ◽  
Corrosion Properties ◽  
Ni Alloys ◽  
Ni Alloy ◽  
Off Time

Chemical composition and phase structure of Zn-Ni alloys obtained by electrochemical deposition under various conditions were investigated. The alloys were deposited on a rotating disc electrode and steel panel from chloride solutions by direct and pulse current. The influence of the pulse plating variables (on-time, off-time, relation of off- and on-time) on the composition, phase structure and corrosion properties were investigated. The phase composition affects the anticorrosive properties of Zn-Ni alloys during exposure to a corrosive agent (3% NaCl solution). It was shown that a Zn-Ni alloy electrodeposited by pulse current with a pulse time of 1 ms and an off- and on-time ratio of 1 exhibits the best corrosion properties.

scholarly journals Electrochemical deposition and characterization of zinc-nickel alloys deposited by direct and reverse current

2005 ◽  
Vol 70 (12) ◽  
pp. 1427-1439 ◽  
Author(s):  
Jelena Bajat ◽  
Aleksandra Petrovic ◽  
Miodrag Maksimovic
Keyword(s):  
Reverse Current ◽  
Rotating Disc ◽  
Time Duration ◽  
Corrosion Properties ◽  
Ni Alloys ◽  
Ni Alloy ◽  
Electrochemically Deposited ◽  
Chemical Content ◽  
Current Densities

Zn-Ni alloys electrochemically deposited on steel under various deposition conditions were investigated. The alloys were deposited on a rotating disc electrode and on a steel panel from chloride solutions by direct and reverse current. The influence of reverse plating variables (cathodic and anodic current densities and their time duration) on the composition, phase structure and corrosion properties were investigated. The chemical content and phase composition affect the anticorrosive properties of Zn-Ni alloys during exposure to a corrosive agent (3%NaCl solution). It was shown that the Zn-Ni alloy electrodeposited by reverse current with a full period T = 1 s and r=0.2 exhibits the best corrosion properties of all the investigated alloys deposited by reverse current.

Revelation of solid solubility limit Fe/Ni = 1/12 in corrosion resistant Cu-Ni alloys and relevant cluster model

2010 ◽  
Vol 25 (2) ◽  
pp. 328-336 ◽  
Author(s):  
Jie Zhang ◽  
Qing Wang ◽  
Yingmin Wang ◽  
Chunyan Li ◽  
Lishi Wen ◽  
...  
Keyword(s):  
Solid Solubility ◽  
Solubility Limit ◽  
Corrosion Performance ◽  
Corrosion Properties ◽  
Solid Solubility Limit ◽  
Corrosion Resistant ◽  
Ni Alloys ◽  
Alloy Series ◽  
Fe Content ◽  
Ni Alloy

Minor Fe additions are necessary to enhance the corrosion resistance of commercial Cu-Ni alloys. The present paper aims at optimizing the Fe content in three alloy series Cu90(Ni,Fe)10, Cu80(Ni,Fe)20, and Cu70(Ni,Fe)30 (at.%) from the viewpoint of their corrosion performance in a 3.5% NaCl solution. An Fe/Ni = 1/12 solid solubility limit line was revealed in the Cu-Ni-Fe phase diagram. Three Fe/Ni = 1/12 alloys, Cu90Ni9.23Fe0.77 (at.%) = Cu-8.6Ni-0.7Fe (wt.%), Cu80Ni18.46Fe1.54 = Cu-17.3Ni-1.4Fe, and Cu70Ni27.7Fe2.3 = Cu-26.2Ni-2.1Fe, show the best corrosion performances in their respective alloy series. The Fe/Ni = 1/12 solubility limit is explained by assuming isolated Fe-centered FeNi12 cuboctahedral clusters embedded in a Cu matrix. The three Fe/Ni = 1/12 alloys can be respectively described by cluster formulas [Fe1Ni12]Cu117, [Fe1Ni12]Cu52, and [Fe1Ni12]Cu30.3. The Fe/Ni = 1/12 rule may serve an important guideline in the industrial Cu-Ni alloy selection because above this limit, easy precipitation would negate the corrosion properties of the Cu-Ni-based alloys.

Electrochemical deposition and characterization of CoFe2O4thin films

2005 ◽  
Vol 202 (1) ◽  
pp. 85-94 ◽  
Author(s):  
S. D. Sartale ◽  
C. D. Lokhande ◽  
V. Ganesan
Keyword(s):  
Electrochemical Deposition

Electrochemical deposition and characterization of SnS thin films

2010 ◽  
Vol 15 (4) ◽  
pp. 683-688 ◽  
Author(s):  
Medhat M. Kamel ◽  
Mervat Mohamed Ibrahim
Keyword(s):  
Thin Films ◽  
Electrochemical Deposition ◽  
Sns Thin Films

scholarly journals Nuclear Gamma Resonance Study of the Ir —Fe and Ir —Ni Alloy Systems

1971 ◽  
Vol 26 (3) ◽  
pp. 343-352 ◽  
Author(s):  
R.L. Mössbauer ◽  
M. Lengsfeld ◽  
W. Von Lieres ◽  
W. Potzel ◽  
T. Teschner ◽  
...  
Keyword(s):  
Composition Range ◽  
Magnetic Hyperfine Field ◽  
Band Model ◽  
Hyperfine Fields ◽  
Ni Alloys ◽  
Dilute Alloys ◽  
Ni Alloy ◽  
Bulk Magnetization ◽  
Bcc Phase ◽  
Alloy Systems

Abstract The Ir-Fe and Ir-Ni alloy systems were studied over the whole composition range by means of the nuclear resonance absorption of the 73 keV y-rays of 193Jr and of the 14.4 keV y-rays of 57Fe. The magnetic hyperfine field at the Ir-nuclei in Ir-Ni alloys decreases approximately linearly with the Ir concentration from - 460 kOe at 4.2 K in very dilute alloys to zero at about 20 at.-% Ir. This behaviour is paralleled by the decrease of the magnetic moment per Ni atom as determined from bulk magnetization measurements. The hyperfine fields at both Ir and Fe were measured for the ferromagnetic bcc phase of the Ir-Fe system. They turned out to be virtually independent of concentration with values of about -1400 kOe and - 330 kOe, respectively. Linewidths increasing with the Ir concentration indicate a distribution of hyperfine fields. The fee phase of the Ir-Fe system has been found to be paramagnetic at 4.2 K throughout the range of its existence. The dependence of the hyperfine fields on concentration is discussed in terms of a rigid 3d-band model combined with local shielding. A discussion of the concentration dependence of the 193Ir and 57Fe isomer shifts has to take into account lattice expansion as well as band repopulation effects.

Electrochemical deposition and microstructural characterization of AlCrFeMnNi and AlCrCuFeMnNi high entropy alloy thin films

2015 ◽  
Vol 358 ◽  
pp. 533-539 ◽  
Author(s):  
V. Soare ◽  
M. Burada ◽  
I. Constantin ◽  
D. Mitrică ◽  
V. Bădiliţă ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrochemical Deposition ◽  
Microstructural Characterization ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Characterization of interference thin films grown on stainless steel surface by alternate pulse current in a sulphochromic solution

2008 ◽  
Vol 11 (4) ◽  
pp. 421-426 ◽  
Author(s):  
Rosa Maria Rabelo Junqueira ◽  
Célia Regina de Oliveira Loureiro ◽  
Margareth Spangler Andrade ◽  
Vicente Tadeu Lopes Buono
Keyword(s):  
Thin Films ◽  
Stainless Steel ◽  
Steel Surface ◽  
Pulse Current ◽  
Stainless Steel Surface
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