超临界水氧化中材料腐蚀问题研究现状及展望.pdf

超临界水氧化中材料腐蚀问题研究现状及 展望 摘 要 ：超临界水氧化是利用水在超临界条件下的对有机物和氧气的良好溶解性的特点，将超临界水作为 有机废水处理 质的一项新兴的污水处理手段。该过程的核心是在高温、高压、高含氧量的反应器中进 行的氧化反应，材料在此严苛的环境中极易发生腐蚀。腐蚀问题已经限制SCWO技术发展的瓶颈之一。 本文综述了国内学者近些年来对SCWO系统中材料腐蚀的三个最主要影响因素，即侵蚀性阴离子、环 境温度以及氧化膜的性质的研究现状，并对当前研究中仍存在的问题进行了讨论。 关键词：超临界水氧化；氧化膜；阴离子；腐蚀 Progress and Forecast in Study on Corrosion Problem of Materials in Supercritical Water Oxidation Yang Jian-Qiao1 Wang Shu-Zhong1 Tang Xing-Ying2 Wang Yu-Zhen3 Zhang Tuo1 Yang Chuang1 (1. Key Laboratory of Thermo-Fluid Science and Engineering of MOE, Xi′an Jiaotong University, Xi′an 710049, China; 2. School of Marine Sciences, GuangXi University, Nanning 530004, China 3. Faculty of Priting and Packaging Engineering, Xi’an University of Technology, Xi’an 710048, China) Abstract: Supercritical water oxidation (SCWO) is an emerging method on waste water treatment using supercritical water, which has excellent solubility of organic matters and oxygen, as the medium of oxidizing reaction on organic wastewater and oxygen. The key reaction of the process acts in a reactor which in high temperature, high pressure and high oxygen concentration environments. As a result, severely corrosion is likely to happen in such environments. Corrosion problem has been one of obstacles on the process of SCWO. In the paper, research progress of three most important factors, namely aggressive anions, environment temperatures and properties of oxidation films are discussed. The main problems existing in current studies and some suggestions on further study were discussed. Key words: Supercritical water oxidation; oxidation film; anion; corrosion 和陶瓷材料。其中镍基合金和不锈钢是SC 0引言 WO系统常用的选材，也是研究最为广泛的 超临界水是指温度和压力超过水的临 材料。镍基合金625 由于其优异的强度性能 界点（374.3