期刊
JOURNAL OF POLYMER RESEARCH
卷 21, 期 4, 页码 -出版社
SPRINGER
DOI: 10.1007/s10965-014-0416-5
关键词
Polyaniline-montmorrilonite; Coating; 316L stainless steel; Corrosion
资金
- University of Kashan [159194/7]
The synthesis of polyaniline- montmorrilonite (MMT) nanocomposite coatings on 316L stainless steel (316L SS) surface has been investigated by using the galvanostatic method. The synthesized coatings were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), UV-visible absorption spectrometry and Scanning Electron Microscopy (SEM). The anticorrosion performances of polyaniline-MMT nanocomposite coatings were investigated in 0.5 M HCl medium by the potentiodynamic polarization technique and Electrochemical Impedance Spectroscopy (EIS). The corrosion rate of polyaniline-MMT nanocomposite coated 316L SS was found similar to 540 times lower than bare 316L SS and potential corrosion increased from -0.386 V versus Ag/AgCl for uncoated 316L SS to -0.040 V versus Ag/AgCl for polyaniline-MMT nanocomposite coated 316L SS electrodes. Electrochemical measurements indicate that polyaniline-MMT nanocomposite coated have good inhibiting properties with mean efficiency of similar to 99.8 % at 0.75 mA cm(-2) current density applied on 316L SS corrosion in acid media. The results of this study clearly ascertain that the polyaniline-MMT nanocomposite has an outstanding potential to protect 316L SS against corrosion in an acidic environment.
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