Barrier Properties of Some New Organic Coatings

被引：0
|
作者：
Vasilescu, Ecaterina [1 ]
Drob, Paula [1 ]
Vasilescu, Cora [1 ]
Hriscu, Mihaela [2 ]
Drob, Silviu Iulian [1 ]
机构：
[1] Inst Phys Chem Ilie Murgulescu, Bucharest 060021, Romania
[2] Mech Engn & Res Inst, Bucharest 041303, Romania
来源：
MATERIALE PLASTICE | 2010年 / 47卷 / 03期
关键词：
protective films; immersion tests; salt spray tests; EIS; cyclic polarisation; CORROSION BEHAVIOR; COATED STEEL; IMPEDANCE; PERFORMANCE; DEGRADATION; RESISTANCE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The new organic coatings were realised from polyurethane resin and alkyd+melamine-formaldehyde resins. The electrochemical techniques of the electrochemical impedance spectroscopy (EIS), cyclic potentiodynamic polarisation and linear polarisation were applied and the tests were carried out in a normal aerated 3% NaCl solution at ambient temperature. Also, open circuit potentials in 3% NaCl solution were monitored for 300 immersion hours. Salt spray tests were carried out according to ASTM B117 Standard. An electric equivalent circuit with two time constants representing the barrier characteristics of the intact organic coating, and the corrosion process occurring at the substrate/paint interface was fitted. The both coatings revealed very good protective properties, assuring a very good resistance for about 8 years in the ambient environment.
引用
收藏
页码：352 / 355
页数：4
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