Accession Number:

AD0668161

Title:

ELECTROCHEMICAL CORROSION STUDIES OF GALVANICALLY COUPLED SNAP-21 MATERIALS

Descriptive Note:

Corporate Author:

NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA

Report Date:

1968-01-15

Pagination or Media Count:

36.0

Abstract:

Electrochemical corrosion rate measurements on materials used in the SNAP-21 radioisotopically-fueled power system have been made in seawater at room temperature. The materials examined included aluminum, copper, Hastelloy C, Hastelloy X, nickel, 3-4 stainless steel, tantalum, titanium-621 alloy and uranium-8 molybdenum alloy. The normal corrosion rate of each material was measured by means of galvanostic polarization techniques. A galvanic series of the materials in seawater was determined and the galvanic currents between galvanically coupled materials were measured with a zero-resistance ammeter circuit. The effect of galvanic coupling of construction materials of the SNAP- 21 system does not materially change the containment time of the Sr-90 fuel in the corrosive seawater environment. Author

Subject Categories:

  • Physical Chemistry
  • Properties of Metals and Alloys
  • SNAP (Systems for Nuclear Auxiliary Power) Technology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE