Highly protective performance of water-based epoxy coating loaded with self-doped nanopolyaniline synthesized under supercritical CO2 condition

被引:7
作者
Bagherzadeh, Mohammad Reza [1 ]
Mousavinejad, Tahereh [2 ]
Akbarinezhad, Esmaiel [1 ]
Ahmadi, Majid [3 ]
机构
[1] Res Inst Petr Ind, Coating Res Ctr, Tehran 1485733111, Iran
[2] Univ Puerto Rico, Dept Chem, San Juan, PR 00931 USA
[3] Univ Puerto Rico, Coll Nat Sci, Dept Phys, San Juan, PR 00936 USA
关键词
Self-doped nano-polyaniline; Supercritical CO2; Water-based epoxy coating; RIPI WBH; Corrosion; EIS; POLYANILINE-MONTMORILLONITE NANOCOMPOSITES; CORROSION PROTECTION; EMULSION POLYMERIZATION; CATHODIC PROTECTION; STEEL; BLEND;
D O I
10.1016/j.porgcoat.2014.07.017
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
In this study corrosion properties of water-based epoxy coating on carbon steel (CS) are improved by adding self-doped nano-polyaniline (SPAni) synthesized under supercritical carbon dioxide (ScCO2) condition. The modified ScCO2-synthesized SPAni using water-based polyamidoamine hardener results in formation of the water-based SPAni composite (5c-WB). To obtain the water-based polyaniline epoxy coating (SP-WBE), the Sc-WB was mixed with epoxy resin in stoichiometric ratio. Applying SP-WBE on CS substrate resulted in high improvement in corrosion properties compared to the similar coating without SPAni. Formation of oxide layers and adhesion properties of SP-WBE at corrosive medium were evaluated using scanning electron microscope (SEM). The transmission electron microscope (TEM) was used to observe the distribution and particles size of nanopolyaniline in the final dried film. The anti-corrosion performance of water-based epoxy coating (blank sample) and SP-WBE coating on CS substrates were studied using salt spray standard test according to ASTM B-117, electrochemical impedance spectroscopy (EIS) and adhesion tests. EIS studies, after 1800 hrs of exposure to corrosive solutions, result in charge transfer resistance of 1.816E9 Q and 8.64E7 Q for 5P-WBE and blank samples, respectively. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:1977 / 1984
页数:8
相关论文
共 29 条
[1]   Synthesis and evaluating corrosion protection effects of emeraldine base PAni/clay nanocomposite as a barrier pigment in zinc-rich ethyl silicate primer [J].
Akbarinezhad, E. ;
Ebrahimi, M. ;
Sharif, F. ;
Attar, M. M. ;
Faridi, H. R. .
PROGRESS IN ORGANIC COATINGS, 2011, 70 (01) :39-44
[2]   Using nanoemeraldine salt-polyaniline for preparation of a new anticorrosive water-based epoxy coating [J].
Bagherzadeh, M. R. ;
Mahdavi, F. ;
Ghasemi, M. ;
Shariatpanahi, H. ;
Faridi, H. R. .
PROGRESS IN ORGANIC COATINGS, 2010, 68 (04) :319-322
[3]  
Bagherzadeh M.R., 2010, European Patent, Patent No. [EP 2,239,293 Al, 2399293]
[4]   Characterization and AC conductivity of polyaniline-montmorillonite nanocomposites synthesized by mechanical/chemical reaction [J].
Bekri-Abbes, Imene ;
Srasra, Ezzeddine .
REACTIVE & FUNCTIONAL POLYMERS, 2010, 70 (01) :11-18
[5]  
Binitha N, 2011, SAINS MALAYS, V40, P215
[6]   Comparative studies on the corrosion protection effect of DBSA-doped polyaniline prepared from in situ emulsion polymerization in the presence of hydrophilic Na+-MMT and organophilic organo-MMT clay platelets [J].
Chang, Kung-Chin ;
Lai, Mei-Chun ;
Peng, Chih-Wei ;
Chen, Yi-Tsen ;
Yeh, Jui-Ming ;
Lin, Ching-Lung ;
Yang, Jen-Chang .
ELECTROCHIMICA ACTA, 2006, 51 (26) :5645-5653
[7]   SYNTHESIS OF WATER-SOLUBLE SELF-ACID-DOPED POLYANILINE [J].
CHEN, SA ;
HWANG, GW .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1994, 116 (17) :7939-7940
[8]   Smart coating based on polyaniline acrylic blend for corrosion protection of different metals [J].
de Souza, Solange .
SURFACE & COATINGS TECHNOLOGY, 2007, 201 (16-17) :7574-7581
[9]   Polyaniline microtubes synthesized via supercritical CO2 and aqueous interfacial polymerization [J].
Du, JM ;
Zhang, JL ;
Han, BX ;
Liu, ZM ;
Wan, MX .
SYNTHETIC METALS, 2005, 155 (03) :523-526
[10]   Influence of nanoparticle surface chemistry and size on supercritical carbon dioxide processed nanocomposite foam morphology [J].
Goren, Kerern ;
Chen, Limeng ;
Schadler, Linda S. ;
Ozisik, Rahmi .
JOURNAL OF SUPERCRITICAL FLUIDS, 2010, 51 (03) :420-427