Corrosion Properties of the Polypyrrole-molybdate Film Electro-polymerized on the AZ31 Mg Alloy

被引：3
作者：
Wang Guixiang [1 ]
Cao Nana [1 ]
Zhang Xiaohong [1 ]
Zhang Lili [1 ]
机构：
[1] Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 06期
基金：
中国国家自然科学基金;
关键词：
polypyrrole-molybdate; cyclic voltammetry; magnesium alloy; corrosion; MAGNESIUM ALLOYS; ELECTROCHEMICAL POLYMERIZATION; PROTECTION; RESISTANCE; PERFORMANCE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The polypyrrole (PPy) coating and polypyrrole-molybdate (PPy-MoO42-) coating were electro-polymerized in sodium salicylate solution by cyclic voltammetry (CV) on the AZ31 Mg alloy surface. Surface morphology of PPy coating and PPy-MoO42- coating on Mg alloy surface before and after being corrupted was observed by scanning electron microscopy (SEM). Attenuated total reflection-infrared (ATR-IR) spectra showed the characteristic ring stretching peaks of the PPy coating and PPy-MoO(4)(2-)coating, and also revealed the influence of MoO42- on the characteristic ring stretching peaks on PPy. The surface resistance was measured by four-point probe method. The open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization analyzed the corrosion resistance performance of PPy coating and PPy-MoO42- coating on the Mg alloy surface in 3.5% NaCI solution immersing for 12 h. The results show that the surface morphology of PPy-MoO42- coating is compact. And the corrosion current density of PPy-MoO42- coating is lower three orders than that of the PPy coating. The PPy-MoO42- coating on the Mg alloy surface has better corrosion resistance and smaller surface resistance than the PPy coating because of the existence of the molybdate ion.
引用
收藏
页码：1480 / 1485
页数：6
相关论文
共 21 条
[1]   Preparation, characterization and performance of conducting polypyrrole composites based on polysulfone [J].
Bhattacharya, A. ;
Mukherjee, D. C. ;
Gohil, J. M. ;
Kumar, Y. ;
Kundu, S. .
DESALINATION, 2008, 225 (1-3) :366-372
[2]   Electrodeposition of polypyrrole onto NiTi and the corrosion behaviour of the coated alloy [J].
Flamini, D. O. ;
Saidman, S. B. .
CORROSION SCIENCE, 2010, 52 (01) :229-234
[3]   Corrosion protection performance of porous strontium hydroxyapatite coating on polypyrrole coated 316L stainless steel [J].
Gopi, D. ;
Ramya, S. ;
Rajeswari, D. ;
Kavitha, L. .
COLLOIDS AND SURFACES B-BIOINTERFACES, 2013, 107 :130-136
[4]   Recent progress in corrosion protection of magnesium alloys by organic coatings [J].
Hu, Rong-Gang ;
Zhang, Su ;
Bu, Jun-Fu ;
Lin, Chang-Jian ;
Song, Guang-Ling .
PROGRESS IN ORGANIC COATINGS, 2012, 73 (2-3) :129-141
[5]   Chemical Oxidative Polymerization of Polypyrrole and Its Corrosion Resistance on the AZ31 Magnesium Alloy [J].
Huang Rong ;
Chen Ming-An ;
Lu Xue-Bin .
ACTA PHYSICO-CHIMICA SINICA, 2011, 27 (01) :113-119
[6]   Corrosion protection of polypyrrole electrodeposited on AZ91 magnesium alloys in alkaline solutions [J].
Jiang, YF ;
Guo, XW ;
Wei, YH ;
Zhai, CQ ;
Ding, WJ .
SYNTHETIC METALS, 2003, 139 (02) :335-339
[7]   Electrosynthesis of polyaniline-molybdate coating on steel and its corrosion protection performance [J].
Karpakam, V. ;
Kamaraj, K. ;
Sathiyanarayanan, S. ;
Venkatachari, G. ;
Ramu, S. .
ELECTROCHIMICA ACTA, 2011, 56 (05) :2165-2173
[8]   Influence of pH on the synthesis and properties of polypyrrole on copper from phytic acid solution for corrosion protection [J].
Lei, YanHua ;
Sheng, Nan ;
Hyono, Atsushi ;
Ueda, Mikito ;
Ohtsuka, Toshiaki .
PROGRESS IN ORGANIC COATINGS, 2014, 77 (04) :774-784
[9]  
Mao LH, 2010, RARE METAL MAT ENG, V39, P2075
[10]   Strategies to improve the corrosion resistance of microarc oxidation (MAO) coated magnesium alloys for degradable implants: Prospects and challenges [J].
Narayanan, T. S. N. Sankara ;
Park, Il Song ;
Lee, Min Ho .
PROGRESS IN MATERIALS SCIENCE, 2014, 60 :1-71
123