Pt catalytic effects on the corrosion and hydrogen chemisorption properties of Zircaloy-2

• Zircaloy-2 oxidized in high-temperature water and treated with Pt nanoparticles Deposited showed no major negative impact on the corrosion kinetics Hydrogen uptake not accelerated substantially by Corrosion mechanism proposed to unravel possible influence of catalysts reduced hydrogen absorption liner cladding Noble metals are added boiling reactors (BWRs) mitigate stress cracking structural components made from steels Ni-based alloys this technology is referred as Metal Chemical Addition (NMCA) or NobleChem TM . There a growing concern that NMCA can cause unwanted harmful effects properties fuel cladding. To investigate this, we have subjected claddings out-of-pile BWR conditions custom-built autoclave. These pressurized hot (280 °C, 9 MPa) for 25, 60 150 days, wherein (~10 nm) were simultaneously injected. Cross-sectional focused ion beam cuts at oxide-metal interface reveal oxide growth significantly influenced local loadings (? 1 µg·cm - 2 ). Surprisingly, an inverse correlation was observed between thicknesses metal's contents. Interestingly, led diminished specimens exposed water. Overall, exhibited detrimental rate Zircaloy-2.