Please use this identifier to cite or link to this item:
DC FieldValue
dc.titleA.c. corrosion of nickel in sulphate solutions
dc.contributor.authorTan, T.C.
dc.contributor.authorChin, D.T.
dc.identifier.citationTan, T.C., Chin, D.T. (1988-11). A.c. corrosion of nickel in sulphate solutions. Journal of Applied Electrochemistry 18 (6) : 831-838. ScholarBank@NUS Repository.
dc.description.abstractThe corrosion of nickel under the influence of alternating current (a.c.) in pH 1-7 Na2SO4 solutions has been investigated with an alternating voltage (a.v.) modulation technique. The anodic polarization curves and pitting behaviour of nickel were examined with the superimposition of sinusoidal, square, and triangular a.v. over a range of a.v. magnitudes of 0-5000m V r.m.s., and a.v. frequencies of 20-5000 Hz. It was found that a.v. reduced the passive d.c. potential regime by increasing the critical current density prior to passivation and by shifting the active-passive transitional potential toward the positive direction. In acidic sulphate solutions, a.v. increased the current density in the passive regime in a way similar to the addition of chloride ions. A.v. destroyed the passivity and enhanced the pitting corrosion of nickel at both the passive and transpassive d.c. potentials. The passivity of nickel was destroyed regardless of the a.v. waveforms. Triangular a.v. caused the severest destruction of passivity; this was followed by sinusoidal and square wave a.v. © 1988 Chapman and Hall Ltd.
dc.contributor.departmentCHEMICAL ENGINEERING
dc.description.sourcetitleJournal of Applied Electrochemistry
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.