CORROSIVE INFLUENCE OF DIPHENYL ON METALS AND OXIDES (KORROZIONNOE VOZDEISTVIE DIFEENILA NA METALLY I OKISLY)
Abstract
An investigation was made of the transformations which can occur with reactor materials exposed to biphenyl and evaluated the effect of such factors as the presence of admixtures and the degree of pyrolytic decomposition. The hydride mechanism of corrosion was investigated first with respect to uranium and its alloys with molybdenum. The corrosion tests with biphenyl were carried out in containers made of 1Kh18N9T stainless steel. The changes undergone by a variety of metals, alloys and oxides are tabulated. Also investigated was the effect of admixtures of water (0.0004-0.7 wt.%) and sulfur (1-3 wt.%) to biphenyl on its corrosive properties. The results indicate that metals and oxides are subject to the following types of transformations in biphenyl: reduction of oxides and hydroxides to the metal or another oxide; formation of hydrides; formation of carbides; and oxidation. Admixture of water to biphenyl in amounts greater than 0.2% was shown to hasten the corrosive failure of aluminum A-1 and SAP-1 alloy and lead to intercrystalline corrosion, as well as embrittling and lowering the strength of the metals. Corrosion was also accelerated by sulfur. Admixtures of water do not affect SAP-1 alloy as much as aluminum AD-1.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 12, 1967
- Accession Number
- AD0670944
Entities
People
- A. N. Rozanov
- I. D. Laptev
- Yu. F. Bychkov
Organizations
- National Air and Space Intelligence Center