| CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER | |
| Wang Jianqiu; Huang Fa; Ke Wei | |
| Corresponding Author | Ke Wei(kewei@imr.ac.cn) |
| 2016-10-01 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 52Issue:10Pages:1333-1344 |
| Abstract | Inconel 690TT and Incoloy 800MA have been widely used as steam generator heat transfer tubes in nuclear power plants (NPPs). The corrosion behaviors of these two alloys in high temperature high pressure water have to be fully addressed. This work systematically studied the microstructures of the as-received Inconel 690TT and Incoloy 800MA steam generator tubes (SGTs) and compared the oxide films formed on the tubing materials in high temperature water using several analytical methods including SEM, EBSD, GIXRD, SAED and STEM. The results show that from outer surface to inner surface of Inconel 690TT SGTs, the deviation degrees from the ideal Sigma 3 misorientation and the average value of Kernel average misorientation (KAM) gradually increase. The outer surface of Inconel 690TT SGTs are weakest. For Incoloy 800MA SGTs, the deviation degrees from the ideal Sigma 3 misorientation are within 0 similar to 1 degrees, and the change of KAM average value is small. Exposed to 325 degrees C pure water containing 0.75x10(-6) O-2 for 720 h, oxide films of both Inconel 690TT SGTs and Incoloy 800MA SGTs have duplex structure. On Inconel 690TT SGTs, the outer layer is Fe-rich spinel and small NiO particles; the inner layer mainly is NiO, porous and less protective with the thickness of 716 nm. On Incoloy 800MA SGTs, the outer layer is big polyhedral spinel; the inner layer is small polyhedral spinel and protective with the average thickness of 150 nm; Cr is enriched at the interface between inner oxide layer and matrix. In high temperature water with dissolved oxygen, due to the preferential dissolution of Cr, Incoloy 800MA is more corrosion resistant than In-conel 690TT. |
| Keyword | Inconel 690TT Incoloy 800MA high temperature high pressure water oxide film |
| Funding Organization | National Funds for Distinguished Young Scholars |
| DOI | 10.11900/0412.1961.2016.00276 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Funds for Distinguished Young Scholars[51025104] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000390080900017 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/123270 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Ke Wei |
| Affiliation | Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Wang Jianqiu,Huang Fa,Ke Wei. CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER[J]. ACTA METALLURGICA SINICA,2016,52(10):1333-1344. |
| APA | Wang Jianqiu,Huang Fa,&Ke Wei.(2016).CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER.ACTA METALLURGICA SINICA,52(10),1333-1344. |
| MLA | Wang Jianqiu,et al."CORROSION BEHAVIORS OF INCONEL 690TT AND INCOLOY 800MA STEAM GENERATOR TUBES IN HIGH TEMPERATURE HIGH PRESSURE WATER".ACTA METALLURGICA SINICA 52.10(2016):1333-1344. |
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