The role of neodymium based thin film on the epoxy/steel interfacial adhesion and corrosion protection promotion

被引：62
作者：
Majd, Mehdi Tabatabaei [1 ]
Shahrabi, Taghi [1 ]
Ramezanzadeh, Bahram [2 ]
机构：
[1] Tarbiat Modares Univ, Dept Mat Engn, Fac Engn, POB 14115-143, Tehran, Iran
[2] ICST, Dept Surface Coatings & Corros, PO 16765-654, Tehran, Iran
来源：
APPLIED SURFACE SCIENCE | 2019年 / 464卷
关键词：
Nd-based film; Corrosion; EIS; XPS; AFM; FE-SEM; AZ31 MAGNESIUM ALLOY; CERIUM CONVERSION COATINGS; ZINC PHOSPHATE; ELECTROCHEMICAL IMPEDANCE; CATHODIC DELAMINATION; COATED STEEL; CARBON-STEEL; PERFORMANCE; MECHANISM; DEPOSITION;
D O I：
10.1016/j.apsusc.2018.09.109
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The main aim of this study is to investigate the impact of the steel substrate Nd-based chemical modification on the corrosion protection performance, cathodic delamination and adhesion properties of epoxy coating. The morphology, chemical composition, topography and chemistry of the treated samples were studied by field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and contact angle measurement. The treated samples and also the epoxy coated samples corrosion resistance was examined through electrochemical impedance spectroscopy (EIS). The impact of mild steel surface modification on the epoxy coating protection efficiency, adhesion strength and cathodic disbondment (CD) resistance was surveyed by salt spray, Pull-off and CD tests. Results showed the deposition of Nd oxide/hydroxide, a surface with lower surface free energy and higher roughness compared to the untreated sample. Chemical treatment by Nd-based film remarkably improved the epoxy coating corrosion protection properties, increased the adhesion strength through chemical and hydrogen bonds, and led to an excellent CD resistance.
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页码：516 / 533
页数：18
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