STABILITY AND TRANSITION OF THE FREE-CONVECTION LAYER ALONG A VERTICAL FLAT PLATE

Abstract

DESCRIPTORS: *Soldering fluxes, Test methods, Sampling, Specifications, Corrosion, Additives, Detection. To establish the necessity of including flux from cored solders in qualification inspections, activated and nonactivated liquid external fluxes and cored solders containing fluxes of the same composition were studied. An effective method for removing flux from the cored solder, the condensation-extraction method, proved effective. Flux extracts from cored solders and equivalent liquid external fluxes were subjected to test methods of the Materials and Perform-ANCE CATEGORIES IN Spec MIL-F-14256b. Evaluation of the results showed that flux extracts performed in the same manner as the liquid external flux in all but 3 test methods: (1) acid number; (2) dryness; and (3) resistivity of water extract. A substitute for the complicated vacuumdeposited-copper corrosion test using electroplated Cu on ferrotype panels was found. Methods for detecting the presence of the flux additives, metallic salts and maleic anhydride, were established.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1961
Accession Number
AD0258750

Entities

People

  • Albin A. Szewczyk

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Boundary Layer Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Froude Number
  • Heat Transfer
  • Prandtl Number
  • Steady State
  • Test Methods
  • Turbulent Flow

Readers

  • Combustion and Flow Dynamics.
  • Superconducting Magnet Technology
  • Surface Engineering/Surface Coating Technology.