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IJSTR >> Volume 10 - Issue 6, June 2021 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

To Investigate Corrosion Prevention Performance Of AISI 316L Stainless Steel In H2SO4 Acidic Medium Using Polytetrafluoroethylene Coating

[Full Text]



Waseem Akram, Sajjad Ahmad, Nabeel Maqsood, Asim Ahmad Riaz, Naveed Ullah



Teflon (Polytetrafluoroethylene, PTFE), 316L Stainless Steel, Corrosion Resistance, Sulfuric Acid (H2SO4), Electrochemical Testing, SEM Morphology, EDX Composition



AISI 316L Stainless steel (SS) belongs to a sub class of Austenitic Chromium Nickel SS. It has wide range of applications due to its excellent property profile. It exhibits and sustains good mechanical strength even at higher temperature and depicts better corrosion resistance. The corrosion performance of AISI 316L SS degrades when it exposes to acidic environment and gets corroded. The present study attempts to investigate the corrosion prevention performance of Polytetrafluoroethylene (PTFE) coated AISI 316L Stainless Steel exposed to H2SO4 acidic medium. The corrosion performance and corrosion rates are investigated in different concentration of H2SO4 using electrochemical corrosion test and Potentiodynamic polarization graphs. Different concentrations of H2SO4 were considered in this study. Using Scanning Electron Microscope, the morphological details of pre- and post-PTFE coated samples of AISI 316L SS were examined and discussed before and after electrochemical corrosion tests. It is found that in comparison with uncoated AISI 316L SS samples, PTFE coated samples provide a relatively good resistance to corrosion rate in H2SO4 acidic medium.



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