A fundamental study on high temperature corrosion of boiler tubes in smelting off-gas environments

冶炼废气环境下锅炉管高温腐蚀的基础研究

• 批准号: 379861-2008
• 负责人: Alfantazi, Akram
• 金额: $ 4.37万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=498664
• 关键词: fundamental; study; temperature; corrosion; boiler

The overall objective of the proposed project is to mount a study to develop a better fundamental understanding of the corrosion of alloy 625 and other candidate materials at high temperatures (200-400 C) and specifically under operating conditions prevailing in the KIVCET boiler off-gas at Teck-Cominco Trail, BC, operation. In addition, suitable alloy(s) for the boiler tube overlay or methods relating to corrosion protection which would increase the service life of the boiler tubes will be recommended. It is intended to further the knowledge gap by applying innovative research. Specific objectives of the proposed research are: (1) to carry out a thorough failure analysis of boiler tubes at Tech-Cominco's KIVCET smelter to define root cause of failure and assist in understanding the complex corrosion mechanism, (2) to study the effects salts and the composition of the off-gas on the corrosion performance of Alloy 625 and others potential alloys, (3) to provide a better fundamental understanding of corrosion mechanism of Alloy 625 and other alloy under the boiler conditions, using both thermochemical modeling and experimental approaches and (4) to recommend the best suitable alloy systems for application at as boiler overlay at Teck-Cominco KIVCET smelter. The study will involve a detailed literature review, failure analysis on representative samples of corroded / failed tubing, thorough physical and chemical characterization of representative deposit samples and thermochemical analysis of the system will be undertaken to determine the stability and equilibria in both the gas phase and phase stability in the deposits, using commercial software FactSage and HSC. Also, an extensive experimental testing program on Alloy 625 and selected candidate alloys will be performed. The testwork will be divided into two types, high temperature corrosion testing using a tube furnace, and electrochemical testing using an autoclave, and high temperature furnace. A post doctoral fellow and a Ph.D. student will work on this research project. The anticipated benefits of the work to Canada and to Teck-Cominco are significant and will have a direct impact on the ability of Canadian companies, to compete effectively in the global market.

拟议项目的总体目的是进行一项研究，以对高温（200-400 c）的合金625和其他候选材料的腐蚀有更好的基本了解（200-400 c），特别是在KIVCET锅炉中普遍存在的工作条件下在不列颠哥伦比亚省Teck-Cominco Trail，操作。此外，建议使用适用于锅炉管覆盖的合金或与腐蚀保护有关的合金，这些合金将建议使用锅炉管的使用寿命。它的目的是通过应用创新研究来弥补知识差距。拟议的研究的具体目标是：（1）对技术 - 摩尼科的Kivcet冶炼厂的锅炉管进行彻底的失败分析，以定义失败的根本原因并有助于理解复杂的腐蚀机制，以研究效应盐的效果盐以及加气对合金625和其他潜在合金的腐蚀性能的组成，（3）使用热化学建模和实验方法，在锅炉条件下对合金625和其他合金的腐蚀机制提供更好的基本了解（4）在Teck-Cominco Kivcet冶炼厂推荐最佳适合合金系统，用于AS锅炉覆盖。该研究将涉及详细的文献综述，对腐蚀 /失败管道的代表性样本的失败分析，代表沉积样品的彻底物理和化学表征以及对系统的热化学分析，以确定气相和气相的稳定性和平衡使用商业软件事实和HSC，存款中的相位稳定性。此外，还将执行有关合金625和选定候选合金的广泛的实验测试程序。测试工作将分为两种类型，使用管炉进行高温腐蚀测试，并使用高温炉和高温炉进行电化学测试。博士后博士学位和博士学位学生将从事这个研究项目。这项工作对加拿大和Teck-Cominco的预期收益很大，并将直接影响加拿大公司在全球市场上有效竞争的能力。