Abstract
A model is developed for description of hydrogen absorption by Zr alloys during high temperature oxidation in steam, based on the detailed experimental results of recent tests on the kinetics of hydrogen absorption by Zr–1Nb cladding during steam oxidation in the temperature range from 900 to 1200°C. The standard consideration of the steam oxidation process in the framework of the coupled anodic/cathodic reactions at the two oxide interfaces (gas/oxide and oxide/metal) is modified, taking into account that hydrogen may intrude into oxide in the form of positively charged protons. For quantitative description of hydrogen behaviour by this mechanism, mass transfer in the three layers, gas, oxide and metal, and at corresponding interfaces, gas/oxide and oxide/metal, is self-consistently considered. Numerical solution of the model generally confirms the main conclusions of simplified analytical treatment and furnishes a satisfactory fitting between measured kinetic curves and calculations.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
