EFFECT OF TEMPERATURE ON PITTING AND CREVICE CORROSION OF NICKEL IN NaCl SOLUTIONS.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)361-366
Journal / PublicationTransactions of the Japan Institute of Metals
Volume25
Issue number5
Publication statusPublished - May 1984
Externally publishedYes

Abstract

Rapid scan, slow scan, potentiostatic and scratch techniques have been applied to determine pitting potentials in 0. 1, 1 and 7%NaCl solutions at 294, 323, 353 and 373 K. The lowest and most accurate pitting potentials are given by potentiostatic techniques. Corrosion potentials attained prior to the onset of pitting in immersion tests are close to values determined by the potentiostatic method. Critical pitting temperature (CPT) and critical crevice temperature (CCT) diagrams have been constructed. The CPT diagram shows that there is an upper and lower temperature limit for pitting on the basis of a reversal temperature.