Application of three-electrode electrolytic cell to evaluate thin films of vegetable and mineral oils

被引：16
作者：
Asadauskas, Svajus J. [1 ]
Griguceviciene, Asta [1 ]
Leinartas, Konstantinas [1 ]
Brazinskiene, Dalia [1 ]
机构：
[1] State Res Inst Ctr Phys Sci & Technol, LT-01108 Vilnius, Lithuania
来源：
TRIBOLOGY INTERNATIONAL | 2011年 / 44卷 / 05期
关键词：
Electrochemistry; Oxidation; Test methods; Rust protection; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; BORATE BUFFER SOLUTION; LOW-CARBON STEEL; CORROSION-RESISTANCE; LUBRICANTS; EIS; KINETICS; IRON; MG; APPLICABILITY;
D O I：
10.1016/j.triboint.2010.09.010
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Films (similar to 5 mu m) of rapeseed and mineral oils with or without antioxidants were coated on steel disc electrodes. Initial stages of corrosion and oxidation were monitored by potentiodynamic polarization and impedance spectroscopy in ammonium borate electrolyte at pH 9.0. Fresh films lead to spatial separation of electrochemical reactions without major changes in corrosion mechanism. However, heating in air (4 h, 70 degrees C) reduced current densities by 2 orders and produced dramatic changes in impedance and phase angle patterns. Data fitting was proposed and reasons discussed why mild heating changed the course of corrosion so strongly. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：557 / 564
页数：8
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