Corrosion Behavior of  -Fe and 20kh13 Steel in Contact with Oxygen-Containing Lead Melts

• Published in: Materials science (New York, N.Y.) Vol. 39; no. 4; pp. 539 - 544
• Main Authors: Tsisar, V P, Eliseeva, O I, Fedirko, V M, Lopushans'kyi, V A
• Format: Journal Article
• Language: English
• Published: New York Springer Nature B.V 01.07.2003
• ISSN: 1068-820X; 1573-885X
• DOI: 10.1023/B:MASC.0000010932.50195.1b

We study the structure and chemical composition of the reaction products formed in the process of contact of [alpha]-Fe and 20Kh13 steel with oxygen-containing stagnant lead melts (600-700°C, 3000 h, C ^sub O[Pb]^ [asymptotically =] (1-4) · 10^sup -5^ wt.%). It is shown that a heterogeneous structure is formed in the interaction zone. This structure consists of an external intermediate layer (with low hardness, the same composition as the matrix, and lead accumulated on the grain boundaries) and a thin oxide film (Fe^sub 3^O^sub 4^ for [alpha]-Fe and FeCr^sub 2^O^sub 4^ and Cr^sub 2^O3 for 20Kh13 steel), which separates the intermediate layer from the internal porous suboxide layer of the matrix and blocks the process of penetration of lead into the matrix.