ELECTROCHEMICAL CORROSION STUDIES OF GALVANICALLY COUPLED SNAP-21 MATERIALS
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 1968
- Accession Number
- AD0668161
Entities
People
- Donald A. Kubose
- Herman I. Cordova
Organizations
- Naval Radiological Defense Laboratory