Anodic dissolution behaviour of nickel in 3 and 10M H2SO4 solutions in the transpassive region has been investigated. Nickel dissolution current efficiency has been determined by splitting potentiostatic polarisation curves into oxygen evolution and nickel dissolution curves by carrying out solution analysis. Nickel dissolution current efficiency is minimum at 1800 mV(SCE) in 3M H2SO4 and primary passivation is not observed in 10M H2SO4, To study the stability fo the passive film formed on the surface of nickel in 3 and 10M H2SO4 solutions, potential decay curves have been recorded from various anodic potentials.
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References
1.
VetterK. J. and ArnoldK.: Z. Elektrochem., 1960, 64, 244.
2.
SatoN. and OkamatoG.: J. Electrochem. Soc., 1963, 110, 605.
3.
KunzeE. and SchwabeK.: Corros. Sci., 1964, 4, 109.
4.
DaviesD. E. and BarkerW.: Corrosion, 1964, 20, 47t.
5.
MacDOUGALLB. and CohenM.: J. Electrochem. Soc., 1976, 123, 1783.
6.
MacDOUGALLB. and CohenM.: J. Electrochem. Soc., 1976, 123, 191.
7.
MacDOUGALLB. and CohenM.: J. Electrochem. Soc., 1974, 121, 1152.
8.
KeddamM., TakenoutiH., and YUN.: J. Electrochem. Soc., 1985, 132, 2561.
9.
LandoltD.: in ‘Passivity of metals’, (ed. FrankenthalR. P. and KrugerJ.), 486; 1978, Princeton, NJ, The Electrochemical Society Inc.
