EFFECT OF Cu-ADDITION ON THE CORROSION BEHAVIOR OF Zr-2.5Nb ALLOYS IN 500 ℃/10.3 MPa SUPERHEATED STEAM

doi:10.3724/SP.J.1037.2011.00275

Acta Metall Sin

2011, Vol. 47

Issue (7): 877-881 DOI: 10.3724/SP.J.1037.2011.00275

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EFFECT OF Cu-ADDITION ON THE CORROSION BEHAVIOR OF Zr-2.5Nb ALLOYS IN 500 ℃/10.3 MPa SUPERHEATED STEAM

LI Qiang, LIANG Xue, PENG Jianchao, YU Kang, YAO Meiyi, ZHOU Bangxin

Laboratory for Microstructures, Shanghai University, Shanghai 200444

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LI Qiang LIANG Xue PENG Jianchao YU Kang YAO Meiyi ZHOU Bangxin. EFFECT OF Cu-ADDITION ON THE CORROSION BEHAVIOR OF Zr-2.5Nb ALLOYS IN 500 ℃/10.3 MPa SUPERHEATED STEAM. Acta Metall Sin, 2011, 47(7): 877-881.

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Abstract Zr-2.5Nb-xCu (x=0.2, 0.5, mass fraction, %) specimens were annealed at 580 ℃ for 50 h and 620 ℃ for 2 h after β-quenching and cold rolling, and then corroded in autoclave with 500 ℃/10.3 MPa superheated steam. SEM and TEM equipped with EDS were employed to investigate their corrosion behaviors through analyzing the microstructures of the fracture surface of the oxide layers or of the cross-section of oxide layers. It was found that the addition of copper can improve the corrosion resistance of Zr-2.5Nb alloy, which is closely related to the increases in the fraction and size of columnar grains in the oxide film.

Key words: Zr-2.5Nb alloy copper corrosion oxide film microstructure

Received: 29 April 2011

Fund:

Supported by National Natural Science Foundation of China (Nos.50871064 and 50971084), National High Technology Research and Development Program of China (No.2008AA031701), Natural Science Foundation of Shanghai (No.09ZR1411700) and Shanghai Leading Academic Discipline Project (No.S30107)

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	LI Jiang
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	PENG Jian-Tiao
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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00275 OR https://www.ams.org.cn/EN/Y2011/V47/I7/877

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