Localized corrosion of Cu and Al thin films exposed to aqueous NaCl solutions was studied using liquid cell transmission electron microscopy (LCTEM). We demonstrate that potentiostatic control can be used to initiate pitting and that local compositional changes, due to focused ion beam implantation of Au(+) ions, can modify the corrosion susceptibility of Al films.

In this work, the corrosion behaviors of an iron-based amorphous coating produced by high-velocity oxy-fuel (HVOF) spraying were investigated. Potentiodynamic and potentiostatic polarization pin-on-ring (corrosion-wear) tests conducted to evaluate corrosive properties as compared with 316L substrate. The substrate coated sample tested in 3.5 wt.% NaCl, 1 M HCl, 0.5 H2SO4 solutions. NaCl HCl sol...

Iron (III) oxide (Fe2O3) is an excellent material for absorbing visible light from the solar spectrum because of its suitable band gap. However, due to low mobility and high bulk carrier recombination, the photoconversion efficiency of iron (III) oxide has been proven to be very poor. Fabrication of nanostructured iron oxide can potentially compensate for the material’s poor properties. In this...

INTRODUCTION Recently, the popularity of Metal-on-Metal (MoM) hip bearings have diminished due to the concerns with generated wear debris and metal ion release that cause a negative response in the surrounding tissues. MoM bearings are typically manufactured from two types of metal alloys, lowcarbon (LC) and high-carbon (HC) CoCrMo. However, little is known about the in-vivo behavior of the two...

The microstructures of copper (Cu) materials were investigated by electron backscatter diffraction, showing that electrodeposited (ED) Cu has a homogenous polycrystalline microstructure, while cold spray (CS) heterogeneous microstructure with varying grain size, pores, and interfacial splat regions. corrosion rate was examined potential (E CORR ) polarization resistance (R p measurements on spe...

In this paper, potentiostatic and galvanostatic deposition (electrochemical deposition) processes have been used for the obtained of a new composite polymer: N-methylpyrrole-sodium 1-dodecanesulfonate/poly 2-methylthiophene (PNMPY-1SSD/P2MT) coatings over brass electrode corrosion protection. The sodium 1-dodecanesulfonate as dopant ion employed in electropolymerization procedure can meaningful...

Programmed current chronopotentiometry, specifically current reversal and current decrease, is applied to electrode reactions characterized by a chemical reaction coupled between two charge-transfer reactions, the ECE mechanism. The equations for the transition times are derived and solved. Current-reversal results on systems following the ECE mechanism, p-nitrosophenol, p-nitrophenol, and o-ni...

11 We describe a simple method to prepare nanostructured copper electrodes based on 12 electrodeposition of copper through a polystyrene nanosphere template to produce a copper sphere 13 segment void (SSV) structure. We show that the SSV copper electrodes give a large SER 14 enhancement under potentiostatic control and we use the SSV copper electrodes to study the 15 adsorption of aromatic and ...