Abstract
For improved efficiency and reduced emissions, the future
power plants need to operate at high temperatures and
pressures, which however are limited by the durability of
conventional materials such as ferritic steels. Steam
oxidation of a number of coatings (Al slurries, thermal
spraying, chemical vapor deposition siliconizing, and
nickel plating) has demonstrated the feasibility of
coatings to improve oxidation resistance. Al slurry
coatings combine good high-temperature oxidation
resistance through the growth of an Al 2 O 3 Al2O3 layer
and the possibility to apply the coating on an industrial
scale at moderate cost. This work aimed to test the
oxidation performance of coatings and reference alloys in
ultra-supercritical (USC) water. The tested materials
included Al slurry coating on ferritic 9%Cr steel and
nickel-based A263 substrates, and bulk P92, MARBN, and
A263 alloys as reference specimens. Oxidation resistance
was tested by exposure to flowing supercritical water
(SCW) with 125 ppb dissolved oxygen at 650°C
(1202°F)/25??MPa (1202°F)/25??MPa (3625 psi) up to 1000
hr.
Original language | English |
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Number of pages | 8 |
Journal | Journal of Nuclear Engineering and Radiation Science |
Volume | 2 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2016 |
MoE publication type | A1 Journal article-refereed |
Keywords
- coating processes
- coatings
- steel
- slurries
- oxidation
- power stations
- alloys
- nickel
- steam