Pitting corrosion of thermally aged cast duplex stainless steel for primary coolant pipes of nuclear power plants
Pitting corrosion of thermally aged cast duplex stainless steel for primary coolant pipes of nuclear power plants
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核电站一次冷却剂管道热老化铸造双相不锈钢的点蚀
DOI：
10.1080/1478422x.2017.1325989
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发表时间：
2017-08
期刊：
影响因子：
--
通讯作者：
Hemin Jing
中科院分区：
文献类型：
--
作者：
Yongqiang Wang;D;an Li;Li Sun;Na Li;Mingkai Liu;Wei Shen;Hemin Jing
用动电位极化和交流阻抗谱研究了热时效Z3CN20.09M铸造双相不锈钢的点蚀行为。随着时效时间的延长，热老化样品的点蚀电位和电荷转移电阻值都变小，而钝化电流密度增大，表明热老化导致了耐点蚀性能的下降。热处理后的热时效试件的点蚀电位高于热时效试件，说明退火后试件的抗点蚀性能有所提高。铁素体在热时效过程中的α‘相析出形成富铬和贫铬区组织，主要导致耐点蚀性能下降。在退火过程中，富铬α相的溶解将缓解或消除富铬区和贫铬区的显微偏析。因此，退火后的试件抗点蚀性能得到了提高。
The pitting corrosion of thermally aged Z3CN20.09M cast duplex stainless steel (CDSS) was investigated using potentiodynamic polarisation and electrochemical impedance spectroscopy. Both pitting potential and charge transfer resistance values of thermally aged specimens became less positive with aging time, while passive current density increased, indicating that thermal aging causes degradation in pitting corrosion resistance. The pitting potential of thermally aged specimens after annealed is higher than that of thermally aged specimens revealing that the pitting corrosion resistance of annealed specimens has been improved. The α’ phase precipitation during thermal aging in ferrite brings the Cr-enriched and Cr-depleted zone microstructures which mainly induced the degradation of pitting corrosion resistance. The microsegregation of Cr element or Cr enriched and Cr-depleted zones will be alleviated or even removed due to the Cr-rich α’ phases dissolution during the process of annealing. So, the pitting corrosion resistance of annealed specimens is improved.
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影响因子：
3.1
作者：
Yongsun Yi;T. Shoji
通讯作者：
Yongsun Yi;T. Shoji
DOI：
--
发表时间：
2009
期刊：
--
影响因子：
--
作者：
H. Berg
通讯作者：
H. Berg
影响因子：
1.7
作者：
Xue, Fei;Wang, Zhao-Xi;Ti, Wenxin
通讯作者：
Ti, Wenxin
DOI：
10.1016/j.msea.2012.11.046
发表时间：
2013-03-01
影响因子：
6.4
作者：
Li, S. L.;Zhang, H. L.;Wang, X. T.
通讯作者：
Wang, X. T.
DOI：
--
发表时间：
1987-06
期刊：
--
影响因子：
--
作者：
H. Chung;O. Chopra
通讯作者：
H. Chung;O. Chopra