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AGGRESSIVE CORROSION OF ADVANCED MATERIALS

先进材料的严重腐蚀

基本信息

批准号：
09044115
负责人：
NARITA Toshio
金额：
$ 2.43万
依托单位：
GRADUATE SCHOOL OF ENGINEERING,HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09044115/
关键词：
High Temperature Corrosion Mixed Oxidants Environmental Degradation Advanced Materials Superalloy Intermetallic Compounds Boiler Tube Turbine Blade 塩化腐食

项目摘要

Heat-resistant alloys used for turbines and boilers had tendency to suffer from severe corrosion at high temperatures. In particular, the energy conversion system is being operated in mixed gas environments containing O, S, and C1 as well as their compounds. In order to make elucidate aggressive corrosion of advanced materials such as intermettallies, super alloy, silicides and aluminide and so on, we made a research group between Hokkaido University and University of New South Wales In Australia. We had four meetings in these two years, and discussed about following topis : oxidation behavior of silicides by Kurokawa, oxidation and sulfidation of TiAl intermetallic compounds by Gleeson, Carburizing of steels and alloys by Young, Chlorination of Ni and Fe-based alloys by Sato, and Sulfidaiton behavior of aluminides by Narita.Through this joint research, we had many fruitful results. One of them is that oxidation or sulfidation in relative simple environments containing oxygen or sulfur is widely accepted to be understandable, however, there are still many unanswered questions of the corrosion behavior in mixed oxidant environments. Therefore, we need to go further investigation in order to make clear in addition to the thermodynamic and kinetic stand points.It is the chief fruit of this joint research that systematic understanding the aggressive corrosion of the advanced materials as suicide, aluminide and super alloy as well as steels and alloys were obtained. In future, the knowldges could be applied to corrosion problems of jet-engines and turbine blade at high temperature, and especially internal corrosions phenomena as oxidation and sulfidatlon will be controlled.

用于汽轮机和锅炉的耐热合金在高温下容易遭受严重的腐蚀。特别地，能量转换系统在包含O、S和Cl以及它们的化合物的混合气体环境中操作。为了阐明金属间化合物、高温合金、硅化物和铝化物等先进材料的侵蚀性腐蚀问题，北海道大学和澳大利亚新南威尔士大学组成了一个研究小组。在这两年中，我们共举行了四次会议，讨论了以下主题：Kurokawa的硅化物的氧化行为，Gleeson的TiAl金属间化合物的氧化和硫化，Young的钢和合金的渗碳，Sato的Ni和Fe基合金的氯化，Narita的铝化物的硫化行为，通过这次联合研究，我们取得了许多丰硕的成果。其中之一是在相对简单的含氧或含硫环境中的氧化或硫化被广泛接受是可以理解的，然而，在混合氧化剂环境中的腐蚀行为仍然存在许多未回答的问题。因此，除了热力学和动力学的观点外，我们还需要进一步的研究，这是本研究的主要成果，对硅化物、铝化物和高温合金等先进材料以及钢和合金的侵蚀腐蚀有了系统的认识。这些知识将来可用于喷气发动机和涡轮机叶片的高温腐蚀问题，特别是氧化和硫化等内腐蚀现象的控制。