POTENTIOSTATIC POLARIZATION STUDIES IN FUSED CARBONATES. PART 2. STAINLESS STEEL

Abstract

Electrochemical studies at 600-700 C are reported for Nb stabilized (347) and Cr stabilized (304) stainless steels in the ternary Li2CO3, Na2CO3 and K2CO3 eutectic mixture by a potentiostatic polarization technique. Results leave little doubt that these stainless steels passivate in fused carbonates. Corrosion potentials for both steels, referred to a Ag/Ag+ reference half cell, are -525+=30 mv (compared to Au and Pt, on the same scale, -470 and -475 mv), and this value is shown to vary qualitatively with environmental effects in accord with the Mass Law controlled equilibrium in fused carbonates. Values of the primary passive potentials at 600 and 700 C are reported. The passivity conferred by anodic electrolysis for these steels makes possible a performance as electrodes quite comparable to that gained when Au-(20%) Pd alloy or Pt are used in the electrolyses of fused carbonates.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1963
Accession Number
AD0426238

Entities

People

  • A. Conte
  • G. J. Janz

Organizations

  • Rensselaer Polytechnic Institute

Tags

Communities of Interest

  • Counter WMD
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Anodic Polarization
  • Anodizing
  • Chemical Synthesis
  • Chemistry
  • Chromium
  • Displacement
  • Government Procurement
  • High Temperature
  • Materials
  • Materials Science
  • Measurement
  • Metals
  • Military Research
  • New York
  • Ordnance Laboratories
  • Polarization
  • Stainless Steel

Fields of Study

  • Materials science

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Surface Engineering/Surface Coating Technology.