Type 304 Stainless Steel With 0.5% Boron for Storage of Spent Nuclear Fuel

Electrochemical Corrosion Testing of Neutron Absorber Materials

“…This secondary phase (boride) is known to reduce the overall localized corrosion properties due to chromium depletion from the austenite phase adjacent to the boride. 10,13,27 Evidence shows that the gadolinide phase was not fully removed in these tests; thus, the final PS corrosion current values (and calculated corrosion rate) are affected by continued corrosion of the gadolinide phase. It is anticipated that the general corrosion performance would improve after the full removal of this phase and would approach the performance level of Alloy C-4 or Alloy 22, depending on the particular chromium level of the heat being tested.…”

“…10 Reported results for Grade B ingot-metallurgy material identify the borides as a M 2 B type where M is a metal 27 with a chromium level of approximately 50% and iron at about 40%. Analysis performed at Bohler Bleche identifies the borides as (Fe,Cr,Ni,Mn,Mo) 2 (B,C).…”

Computational Modeling for Coarsening of (Fe,Cr)₂B in Borated Stainless Steel

“…The mechanical properties of BSS are known to be mainly influenced by the volume fraction and morphology of the borides. 2,3) Therefore, the mechanical properties need to be improved by controlling the size and morphology of boride through appropriate heat-treatment.…”

Investigation of the Localized Corrosion and Passive Behavior of Type 304 Stainless Steels with 0.2–1.8 wt % B

“…A small addition of B of less than approximately 50 ppm to FeCrNi-based austenitic stainless steels is recognized to be beneficial to the creep resistance, hot workability, and intergranular corrosion resistance [13,14,15,16,17,18]. However, the solubility of B in the austenitic stainless steels is very limited—as low as approximately 100–150 ppm depending on the matrix composition [9,13,19]; thus, the addition of an excessive amount of B inevitably forms M 2 B (M stands for metal; Cr and/or Fe) type phase, which is known to degrade the mechanical and corrosion properties [4,5,6,7,8,13,20]. The corrosion damage of the stainless steel racks can accelerate the fracture of the structure; thus, the corrosion behavior of BSSs has been investigated and well documented.…”

“…The corrosion damage of the stainless steel racks can accelerate the fracture of the structure; thus, the corrosion behavior of BSSs has been investigated and well documented. Loria et al [13] reported the general corrosion behavior and intergranular corrosion susceptibility of type 304 stainless steel with 0.5 wt % B and without B in sulfuric acid solution. He et al [8] investigated the general and localized corrosion behavior of BSSs (UNS S30464 and UNS S30465) in simulated groundwater at 60–90 °C.…”