White flux

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An old name for a flux mixture containing 10 parts of Sodium carbonate and 13 parts of Potassium carbonate. It was used to separate Silica from minerals (Schur 1985). Currently, white flux usually refers to a mixture of Sodium nitrate / Sodium nitrite used for high-temperature welding.

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 336
  • Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985