Effect of water chemistry on the oxide film on Alloy 690 during simulated hot functional testing of a pressurised water reactor

被引：40
作者：
Betova, Iva [2 ]
Bojinov, Martin [1 ]
Karastoyanov, Vasil [1 ,3 ]
Kinnunen, Petri [3 ]
Saario, Timo [3 ]
机构：
[1] Univ Chem Technol & Met, Dept Phys Chem, BU-1756 Sofia, Bulgaria
[2] Tech Univ Sofia, Dept Chem, Sofia 1000, Bulgaria
[3] VTT Tech Res Ctr Finland, FIN-02044 Espoo, Finland
来源：
CORROSION SCIENCE | 2012年 / 58卷
关键词：
Nickel; Alloy; EIS; XPS; Modelling studies; Reactor conditions; NI-BASE ALLOYS; HIGH-TEMPERATURE WATER; NICKEL-BASED ALLOYS; MIXED-CONDUCTION MODEL; LAYER CONSTITUENTS; KINETIC-PARAMETERS; STAINLESS-STEEL; PASSIVE FILMS; CORROSION; COOLANT;
D O I：
10.1016/j.corsci.2012.01.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Electrochemical impedance spectroscopic measurements to follow the oxidation of Alloy 690 in high-temperature water environments simulating hot functional test (HFT) chemistries are presented and discussed. The thickness and in-depth composition of the formed oxides is estimated by X-ray photoelectron spectroscopy. Kinetic and transport parameters of the oxidation process are estimated by quantitative comparison of the results with the mixed-conduction model for oxide films. Based on the influence of LiOH and H3BO3 concentrations on the parameter values, conclusions for the relationship between HFT water chemistry and the electrical and electrochemical properties of the passive layer on reactor coolant circuit surfaces are drawn. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：20 / 32
页数：13
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