690合金在NaCl溶液中的电化学行为研究

中国腐蚀与防护学报

2012, Vol. 32

Issue (2): 146-150

研究报告

本期目录 | 过刊浏览

690合金在NaCl溶液中的电化学行为研究

乔岩欣,任爱,刘飞华

苏州热工研究院有限公司苏州 215004

ELECTROCHEMICAL BEHAVIOR OF ALLOY 690 IN NaCl SOLUTION

QIAO Yanxin, REN Ai, LIU Feihua

Suzhou Nuclear Power Research Institute, Suzhou 215004

全文: PDF(569 KB)

摘要: 利用动电位极化曲线、电化学阻抗谱和电流-时间响应曲线对690合金在NaCl溶液中的电化学行为进行了研究。结果表明，690合金在不同浓度的NaCl溶液中均表现出阳极钝化现象，腐蚀速率随NaCl浓度的升高而增加。钝化后690合金的耐蚀性提高，在1%NaCl溶液中生成的钝化膜较致密。钝化时间小于1096 s时690合金在0.1%NaCl中的腐蚀电流密度低于其在1%NaCl中的腐蚀电流密度，当钝化时间大于1096 s时690合金在0.1%NaCl中的腐蚀电流密度反而高于其在1%NaCl中的腐蚀电流密度。

关键词 ： 690合金, 腐蚀, 电化学, 钝化膜

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

收稿日期: 2010-12-07

ZTFLH:

TG172.5

基金资助:

江苏省自然科学基金项目（BK2011317）和广东核电集团项目（CGNPC2010S096-09）资助

通讯作者: 乔岩欣 E-mail: qiaoyanxin2009@cgnpc.com.cn

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

作者简介: 乔岩欣，男，1980年生，博士，高级工程师，研究方向为核电站结构材料的腐蚀和应力腐蚀

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引用本文:

乔岩欣,任爱,刘飞华. 690合金在NaCl溶液中的电化学行为研究[J]. 中国腐蚀与防护学报, 2012, 32(2): 146-150.
QIAO Yan-Xin, REN Ai, LIU Fei-Hua, ZHENG Yu-Gui. ELECTROCHEMICAL BEHAVIOR OF ALLOY 690 IN NaCl SOLUTION. J Chin Soc Corr Pro, 2012, 32(2): 146-150.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2012/V32/I2/146

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