ELECTROCHEMICAL BEHAVIOR OF ALLOY 690 IN NaCl SOLUTION

J Chin Soc Corr Pro

2012, Vol. 32

Issue (2): 146-150 DOI:

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ELECTROCHEMICAL BEHAVIOR OF ALLOY 690 IN NaCl SOLUTION

QIAO Yanxin, REN Ai, LIU Feihua

Suzhou Nuclear Power Research Institute, Suzhou 215004

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Abstract The electrochemical behavior of alloy 690 in NaCl were investigated by means of potentiodynamic polarization curves, electrochemical impendence spectrum and current-time transient curves. Alloy 690 exhibited anodic passivation behavior in tested solution. The corrosion rate of alloy 690 increased with the increase of NaCl concentration in tested solution. The passive film of alloy 690 formed in 1% NaCl was relatively compact compared with that in 0.1% NaCl at applied potential of 0.2 V. The corrosion current density of alloy 690 in 1% NaCl (I_p1) was higher than that in 0.1% NaCl (I_p2) when passivation periods less than 1096 s. The value of I _p1 was lower than I_p2when passivation periods longer than 1096 s.

Key words: alloy 690 corrosion electrochemical passive film

Received: 07 December 2010

ZTFLH:

TG172.5

Corresponding Authors: QIAO Yanxin E-mail: qiaoyanxin2009@cgnpc.com.cn

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Cite this article:

QIAO Yanxin, REN Ai, LIU Feihua. ELECTROCHEMICAL BEHAVIOR OF ALLOY 690 IN NaCl SOLUTION. J Chin Soc Corr Pro, 2012, 32(2): 146-150.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I2/146

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