Liquid metal corrosion of T91 and A316L materials in Pb–Bi eutectic at temperatures 400–600°C

Protection against corrosion of iron alloys by aluminized coatings produced using two different processes

“…Spectrum 1b, in turn, shows that an annealing treatment at 350 • C for 1 h led a significant interdiffusion to occur in the sample, with the following effects: (1) formation of the Fe 3 Al intermetallic compound (sextet η) [6], (2) increase in the amount of Fe-Al solid solutions, as suggested by area measurements of the contributions to the spectra, and (3) disappearance of α-Fe in the form of small particles. In the ordered DO 3 structure of Fe 3 Al, Fe occupies sites in two different sublattices with H hf = 216 kOe and IS = 0.19 mm s −1 and, respectively, H hf = 327 kOe and IS = 0.07 mm s −1 , whose contributions to the Mössbauer spectra are in the ratio 2:1 [6,7].…”

“…In this regard, a new and important field of application is represented by the protection of steels to be used in heavy liquid metal-cooled (HLM) nuclear reactors, where the base alloy in contact with HLM can undergo a considerable damage due to corrosion phenomena [1]. Aluminized coatings are expected to adequately resist the main corrosion processes: iron oxidation by oxygen in the melt, and dissolution into the melt of alloying elements in the steel, as it has been found in the case of austenitic stainless steels which undergo significant losses of Ni and Cr when kept in contact with liquid Pb or Pb-Bi eutectic alloy [2][3][4].…”

Effect of Cr on the mechanical properties and microstructure of Fe–Cr model alloys after n-irradiation

“…Thus, their chemical composition and thermo-mechanical treatments have been optimized over decades of experimental investigations to resist the expected harsh conditions. Indeed, it was found that the steels containing 9 wt% Cr are resistant to swelling [5], less brittle [6] and reasonably immune to erosion corrosion [7] in the temperature range of 300-500°C. The physical understanding of these empirical findings is the aim of this investigation.…”

A study of the neutron irradiation effects on the susceptibility to embrittlement of A316L and T91 steels in lead–bismuth eutectic

“…At this temperature the materials corrode at acceptable rates (e.g. 9Cr-1Mo modified martensitic steel corrodes at a rate of about 45 lm/year and austenitic stainless steel AISI 316L at 2 lm/year [1]). In addition, the use of LBE sets relatively benign stress requirements to the materials (50 MPa) thankful to its high boiling temperature (1670°C).…”