学位：博士
职称：教授
所在单位：材料科学与工程学院
长期从事金属材料蠕变、组织演化、损伤及寿命预测工作。主持和参加国家自然科学基金重点和面上项目6项，“863”计划课题2项，省部级及企业项目20余项。获国家发明专利5项，发表学术论文200余篇。出版专著“耐热钢持久性能的统计分析及可靠性预测”1部（科学出版社），译著“高温合金”1部，编著1部。获辽宁省教学名师，宝钢教育奖优秀教师奖。辽宁省教学成果一等奖1项，国家本科一流课程、国家精品在线开放课程负责人。Emerald出版社颁发的学术奖“Literati Club Awards for Excellence”，金属学报2009-2015年度优秀论文奖。省部级科技奖励一等奖、二等奖5项。
Hot corrosion behaviors of Super 304H austenitic stainless steelpre-coated in Na2SO4-25%NaCl mixture salt film
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论文类型：期刊论文
发表时间：2018-11-01
发表刊物：JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
收录刊物：SCIE
卷号：25
期号：11
页面范围：1149-1155
ISSN号：1006-706X
关键字：Ultra supercriticality; Hot corrosion; Sulfidation; Chloridation
摘要：Hot corrosion rates of Super 304H austenitic stainless steelpre-coated inNa(2)SO(4)-25%NaCl mixture salt film in air at 650 degrees C and 750 degrees C have been investigated by corrosion kinetics curves. The corrosion products are examined by means of X-ray diffraction and scanning electron microscopy coupled with energy-dispersive spectrometer, and electron probe micro-analyzer to analyze the scale structure and element distribution of the cross section. The results indicate that the kinetics curves are similar and display parabolic growth, and the mass gain obviously increases with the increasing temperature. A two-layer oxide scale composed of Fe oxides containing CuFe2O4 and Cr2O3 forms on the surface of the alloy and easily exfoliates with extending corrosion time or with improving corrosion temperature. Moreover, a corrosion-affected zone with micropores and micro-cracks appears beneath the oxide scale. It is concluded that the selective oxidation occurs and a protective oxide scale forms at the early corrosion stage. The melt salts destroy the integrity of the oxide scale and accelerate hot corrosion of the alloy by the cyclical oxidation-chlorination during the further corrosion processing. In addition, internal sulfidation also contributes to the corrosion of the alloy.
发表时间：2018-11-01
