Study On Oxidation Behavior At High Temperature For A Novel Tubing Steel With Higher Aluminum Content

In the 21^st century, the critical challenge of providing abundant, cheap electricity while at the same time preserving environmental values makes it necessary for the development of the Ultra Supercritical Power Plant. The main technology is the development of stronger high-temperature materials capable of operating under high stresses at ever-increasing temperatures. One of the major limited factors in using materials is their susceptibility to oxidation on the steam-side. This is due to the fact that the oxide scales formed on the steam-side growing more quickly with increasing temperature can lead to major failures and consequently to reduce plant availability.A novel tube steel with higher Al content is under development material to improve operating performance and reliability of Ultra-Supercritical Power Plant. This work evaluated the high temperature oxidation resistance of the novel steel compared to some conventional tube steels. The result shows that a protective, slow growing and adherent Al-enriched scale formed at 800 and 900℃in the environments with or without water vapor, which is superior to the chromium scale formed on those conventional tube steels.