中国电机工程学报2011，Vol.31Issue(35)：123-128,6.
溶解氧浓度对低合金钢T24在超临界水中氧化的影响
Influence of Dissolved Oxygen Concentration on Oxidation of Low Alloy ! Steel T24 Exposed to Supercritical Water
摘要
Abstract
Some boiler tubes in supercritical and ultra supercritical power plant work in supercritical water, the oxidation resistance of which affects directly their lifetime. The oxidation of low alloy steel T24 exposed to supercritical water containing different dissolved oxygen concentration of 10-7, 3×10^-7 and 2×10^-6 at 550 ℃ under 25 MPa was investigated. Weight gains were measured by milligram balance. The surface and cross-sectional morphologies as well as elemental depth profiles were observed by scanning electron microscope （SEM） and energy dispersive X-ray spectroscopy （EDS）. The oxide phase structures were analyzed by X-ray diffraction （XRD）. Based on these observations, the influence of dissolved oxygen concentration on oxidation of T24 was also discussed. The results show that weight gain increases With the dissolved oxygen concentration increasing. The oxide layer is a typical dual-layered structure. High dissolved oxygen can lead to a milt-layered structure. Dissolved oxygen concentration plays an important role on oxide scale exfoliation.关键词
T24钢/氧化/超临界水/溶解氧Key words
T24 steel/oxidation/supercritical water/dissolved oxygen分类
能源科技引用本文复制引用
张乃强,徐鸿,白杨,李宝让..溶解氧浓度对低合金钢T24在超临界水中氧化的影响[J].中国电机工程学报,2011,31(35):123-128,6.基金项目
中央高校基本科研业务费专项资金（09MG29) （）
中国华能集团科技项目（HNKJ08-H25). （）
