Corrosion protection behavior of poly(N-methylpyrrole)/boron nitride composite film on aluminum-1050


Guven N. C. , ÖZKAZANÇ H.

PROGRESS IN ORGANIC COATINGS, vol.164, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 164
  • Publication Date: 2022
  • Doi Number: 10.1016/j.porgcoat.2021.106696
  • Title of Journal : PROGRESS IN ORGANIC COATINGS
  • Keywords: Poly (N-methylpyrrole), Boron nitride, Aluminum, Corrosion, Mixture electrolyte, N-METHYLPYRROLE, MILD-STEEL, PHOTOELECTRON-SPECTROSCOPY, COATINGS, POLYPYRROLE, ELECTRODEPOSITION, SURFACE, DBSA, BN, MICROELECTRODES

Abstract

In this study, the surface of aluminum-1050 (Al-1050), which has industrial importance, was covered with poly (N-methylpyrrole)/boron nitride (PNMPy/BN) composite film in a mixture electrolyte of oxalic acid (OXA) and dodecylbenzene sulfonic acid (DBSA) by the galvanostatic method. Fourier Transform Infrared (FT-IR) Spectroscopy, Thermogravimetry (TG), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) techniques were used for the characterization and morphology of the film. Corrosion analyzes were performed with Tafel polarization and electrochemical impedance spectroscopy (EIS) in 0.1 M H2SO4. The DBSA-OXA mixing electrolyte markedly increased the homogeneity and adhesiveness of the coatings. The corrosion efficiency of PNMPy/BN composite film coated on the Al-1050 surface was 98.6%. BN nanoparticles significantly reduced the size of agglomerate structures on the surface of the polymer film, while reducing the average thickness of the polymer film from 28 mu m to 20 mu m. Besides, the filling process reduced the surface roughness of PNMPy from 121 to 95 nm. EIS analyzes showed that PNMPy and PNMPy/BN composite films increased the charge transfer resistance (R-ct) of Al-1050 around 172 and 238 times, respectively. It was observed that coatings in the corrosive environment did not separate from the Al-1050 surface even at the end of the 6th day, and the PNMPy/BN composite film provided the best protection.