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Optimization of the Anode-Stub Contact: Effect of Casting Temperature, Contact Stress, Temperature and Surface Roughness

Abstract

The electrical contact between the anode and the anode stub is normally facilitated by cast iron. Investigations have been carried out on the effect on the anode stub contact resistance from: Casting temperature of the iron, Temperature of the stub-anode coupling, Uniaxial stress between carbon and cast iron, Surface roughness. Standard grey iron was cast at three temperatures (1430, 1340 and 1250°C) maintaining actual rodding cooling rate, to simulate the tendency of white iron forming during casting. The specimens were subjected to contact resistance measurements with anode carbon at 1 A/cm2 current density, varying the uniaxial stress and temperature. Both stress and temperature increase reduced the contact resistance, while low casting temperature did not affect the resistance significantly. The influence from the surface roughness on the contact resistance was not significant

Category

Academic article

Language

English

Author(s)

  • Bjarte Arne Øye
  • Anne Støre
  • Elin Haugland
  • Jørund Gimmestad Hop

Affiliation

  • SINTEF Industry / Metal Production and Processing
  • Norsk Hydro ASA

Year

2013

Published in

Light Metals

ISSN

0147-0809

Publisher

John Wiley & Sons

Volume

Light Metals Volume

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