Ni-W alloys were electrochemically deposited from an ammonia-citrate electrolyte on rotating disc electrode with a gold disc, by direct and pulsating current. The corrosion potential and kinetics of cathodic and anodic reaction were investigated on the alloys with molar fraction of tungsten from 0.11 to 0.25 in acid and neutral sulfate solutions of various pH. On the basis of kinetic equations resulting from these data, it was proposed that a barrier lazer of nickel and tungsten oxide was formed on the alloy surface preventing further alloy dissolution.
Prevlake legure Ni-W su elektrohemijski taložene iz amonijačno-citratnog elektrolita, na rotirajuću disk elektrodu od zlata, konstantnom i pulsirajućom strujom. Korozioni potencijal, kinetika katodne i anodne reakcije na elektrohemijski taloženim prevlakama legura Ni-W, sa udelom volframa od 0,11 do 0,25, su ispitivani u kiselim i neutralnim sulfatnim rastvorima, različitih pH vrednosti. Na osnovu dobijenih rezultata izvedene su kinetičke jednačine za katodnu i anodnu reakciju, koje ukazuju na formiranje barijernog sloja oksida volframa i nikla koji sprečava rastvaranje legure i delimično se redukuje pri katodnoj polarizaciji.
Keywords:
electrochemically deposited nickel-tungten alloys / corrosion potential / kinetic catodic and anodic current / elektrohemijsko taloženje / legura nikal-volfram / korozioni potencijal / kinetika katodne i anodne reakcije
Source:
Zaštita materijala, 2006, 47, 2, 3-10
Publisher:
Engineering Society for Corrosion, Belgrade, Serbia
TY - JOUR
AU - Obradović, Maja
AU - Grgur, Branimir
AU - Gojković, Snežana
PY - 2006
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/982
AB - Ni-W alloys were electrochemically deposited from an ammonia-citrate electrolyte on rotating disc electrode with a gold disc, by direct and pulsating current. The corrosion potential and kinetics of cathodic and anodic reaction were investigated on the alloys with molar fraction of tungsten from 0.11 to 0.25 in acid and neutral sulfate solutions of various pH. On the basis of kinetic equations resulting from these data, it was proposed that a barrier lazer of nickel and tungsten oxide was formed on the alloy surface preventing further alloy dissolution.
AB - Prevlake legure Ni-W su elektrohemijski taložene iz amonijačno-citratnog elektrolita, na rotirajuću disk elektrodu od zlata, konstantnom i pulsirajućom strujom. Korozioni potencijal, kinetika katodne i anodne reakcije na elektrohemijski taloženim prevlakama legura Ni-W, sa udelom volframa od 0,11 do 0,25, su ispitivani u kiselim i neutralnim sulfatnim rastvorima, različitih pH vrednosti. Na osnovu dobijenih rezultata izvedene su kinetičke jednačine za katodnu i anodnu reakciju, koje ukazuju na formiranje barijernog sloja oksida volframa i nikla koji sprečava rastvaranje legure i delimično se redukuje pri katodnoj polarizaciji.
PB - Engineering Society for Corrosion, Belgrade, Serbia
T2 - Zaštita materijala
T1 - Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys
T1 - Kinetika korozionih reakcija u kiselim i neutralnim rastvorima na elektrohemijski taloženim legurama Ni-W
EP - 10
IS - 2
SP - 3
VL - 47
UR - https://hdl.handle.net/21.15107/rcub_technorep_982
ER -
@article{
author = "Obradović, Maja and Grgur, Branimir and Gojković, Snežana",
year = "2006",
abstract = "Ni-W alloys were electrochemically deposited from an ammonia-citrate electrolyte on rotating disc electrode with a gold disc, by direct and pulsating current. The corrosion potential and kinetics of cathodic and anodic reaction were investigated on the alloys with molar fraction of tungsten from 0.11 to 0.25 in acid and neutral sulfate solutions of various pH. On the basis of kinetic equations resulting from these data, it was proposed that a barrier lazer of nickel and tungsten oxide was formed on the alloy surface preventing further alloy dissolution., Prevlake legure Ni-W su elektrohemijski taložene iz amonijačno-citratnog elektrolita, na rotirajuću disk elektrodu od zlata, konstantnom i pulsirajućom strujom. Korozioni potencijal, kinetika katodne i anodne reakcije na elektrohemijski taloženim prevlakama legura Ni-W, sa udelom volframa od 0,11 do 0,25, su ispitivani u kiselim i neutralnim sulfatnim rastvorima, različitih pH vrednosti. Na osnovu dobijenih rezultata izvedene su kinetičke jednačine za katodnu i anodnu reakciju, koje ukazuju na formiranje barijernog sloja oksida volframa i nikla koji sprečava rastvaranje legure i delimično se redukuje pri katodnoj polarizaciji.",
publisher = "Engineering Society for Corrosion, Belgrade, Serbia",
journal = "Zaštita materijala",
title = "Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys, Kinetika korozionih reakcija u kiselim i neutralnim rastvorima na elektrohemijski taloženim legurama Ni-W",
pages = "10-3",
number = "2",
volume = "47",
url = "https://hdl.handle.net/21.15107/rcub_technorep_982"
}
Obradović, M., Grgur, B.,& Gojković, S.. (2006). Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys. in Zaštita materijala
Engineering Society for Corrosion, Belgrade, Serbia., 47(2), 3-10.
https://hdl.handle.net/21.15107/rcub_technorep_982
Obradović M, Grgur B, Gojković S. Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys. in Zaštita materijala. 2006;47(2):3-10.
https://hdl.handle.net/21.15107/rcub_technorep_982 .
Obradović, Maja, Grgur, Branimir, Gojković, Snežana, "Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys" in Zaštita materijala, 47, no. 2 (2006):3-10,
https://hdl.handle.net/21.15107/rcub_technorep_982 .
