HOT CORROSION OF NICKEL IN ANHYDROUS SODIUM-HYDROXIDE

Authors
KOMATH M
Citation
M. Komath, HOT CORROSION OF NICKEL IN ANHYDROUS SODIUM-HYDROXIDE, Materials chemistry and physics, 45(2), 1996, pp. 171-175
Citations number
19
Categorie Soggetti
Material Science
Journal title
Materials chemistry and physics → ACNP
ISSN journal
02540584
Volume
45
Issue
2
Year of publication
1996
Pages
171 - 175
Database
ISI
SICI code
0254-0584(1996)45:2<171:HCONIA>2.0.ZU;2-E
Abstract
The action of hot NaOH melt on metallic nickel surfaces in the tempera ture range 700-850 degrees C is investigated. It is observed that nick el dissolves in NaOH to form sodium nickelate (NaNiO2) and the melt-me tal interface becomes coated with a film of nickel oxide (NiO). The co rrosion rates of Ni in NaOH under the experimental conditions are nota bly high, 2-3 orders of magnitude higher than those reported at lower temperatures.