Corrosion Behavior of 316L Stainless Steel Coated by Chitosan/Gold/Nickel Nanoparticles in Mixed Acid Mixture Containing Inorganic Anions

The electrochemical behavior of 316L stainless steel alloy was performed by open circuit potential, electrochemical impedance spectroscopy, potentiodynamic polarization measurements and surface examination using scanning electron microscope technique in phosphoric and sulphuric acid solution mixture...

Full description

Saved in:
Bibliographic Details
Published in:International journal of electrochemical science 2017-10, Vol.12 (10), p.8991-9006
Main Authors: Tammam, Reham H., Fekry, Amany M.
Format: Article
Language:English
Subjects:
316L stainless steel
coating
EIS, SEM and nanoparticles
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The electrochemical behavior of 316L stainless steel alloy was performed by open circuit potential, electrochemical impedance spectroscopy, potentiodynamic polarization measurements and surface examination using scanning electron microscope technique in phosphoric and sulphuric acid solution mixtures with different percentages. The effects of inorganic additives (fluoride and iodide) on the corrosion of the tested alloy in mixed acidic mixture were also done. It was found that the corrosion rate decreases in the acidic mixture solution containing iodide than fluoride ion. However, electrodeposition of chitosan/Gold nanoparticles (AuNPs)/nickel nanoparticles (NiNPs) protects well the alloy surface in the most corroded solution of 0.005 M NaF. The efficiency increases according to the following order: coating >I- >F- > blank mixed acidic mixture. EIS results are in decent arrangement with polarization and open circuit potential results. All results are confirmed with surface examination.
ISSN:1452-3981
1452-3981
DOI:10.20964/2017.10.74