Role of hydrogen in the high-temperature corrosion of zirconium and its alloys. II Oxidation of unalloyed zirconium in steam and in oxygen

2007 ◽  
Vol 10 (12) ◽  
pp. 511-520 ◽  
Author(s):  
D. R. Silvester ◽  
J. N. Wanklyn
Keyword(s):  
High Temperature ◽  
High Temperature Corrosion

A Stochastic Model of Oxidation Mechanism on High Temperature Corrosion of Stainless Steel

2006 ◽  
Author(s):  
Huajun Chen ◽  
Yitung Chen ◽  
Hsuan-Tsung Hsieh
Keyword(s):  
High Temperature ◽  
Oxide Layer ◽  
Present Model ◽  
Oxidation Mechanism ◽  
High Temperature Corrosion ◽  
Iron Species ◽  
Corrosive Liquid ◽  
Model Mapping ◽  
Wagner Theory

To interpret the role of diffusion and reaction process, a cellular automaton model, which combines the surface growth and internal oxidation, was developed to explain the oxidation mechanism of stainless steels in high temperature corrosive liquid metal environment. In this model, three main processes, which include the corrosion of the substrate, the diffusion of iron species across the oxide layer and precipitation of iron on the oxide layer, are simulated. The diffusion process is simulated by random walk model. Mapping between present model and Wagner theory has been created. The gross features concerning the evolution of the involved process were founded.

Influence of Al on the High Temperature Corrosion Behaviour of Inconel 617 in VHTR Primary Coolant Atmosphere

2008 ◽  
Vol 595-598 ◽  
pp. 491-500 ◽  
Author(s):  
Jerome Chapovaloff ◽  
Gouenou Girardin ◽  
Damien Kaczorowski ◽  
Krzysztof Wolski ◽  
Michèle Pijolat
Keyword(s):  
High Temperature ◽  
Elevated Temperatures ◽  
Corrosion Behaviour ◽  
High Temperature Corrosion ◽  
Primary Coolant ◽  
Inconel 617

Due to the specific in service VHTR conditions, the corrosion behaviour of Inconel 617, candidate alloy for the IHX design, has been investigated at elevated temperatures in representative helium containing impurities (CO, H2O, H2 and CH4) in the range of 'bar. The role of Al in the corrosion behaviour of IN617 is investigated using Ni-22Cr-9Mo base model alloys containing different Al levels (from 0 to 2wt.%).

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