Rong-Gui Du

In-Situ Imaging of Chloride Ions at the Metal/Solution Interface by Scanning Combination Microelectrodes

Abstract Combination solid silver-silver chloride (Ag-AgCl) and liquid membrane Cl− ion-selective microelectrodes were designed and constructed. These microelectrodes, which had a micrometer-sized ...

Facile ultrasonic deposition of SnO2 nanoparticles on TiO2 nanotube films for enhanced photoelectrochemical performances

After a self-organized TiO2 nanotube film on a Ti substrate was fabricated through anodic oxidation, SnO2 nanoparticles were deposited on the film by a facile ultrasonic assisted deposition method. The photoelectrochemical performances of the prepared SnO2–TiO2 nanotube composite films were evaluated by measuring their incident photon to current conversion efficiencies, transient photocurrents, and photopotentials. The results demonstrated that the deposited SnO2 nanoparticles could greatly enhance the photoelectrochemical performance of the TiO2 nanotube film. The SnO2–TiO2 nanotube composite films were highly sensitive to white light illumination. A maximum incident photon to current conversion efficiency of 89.98% at 335 nm wavelength and a maximum photocurrent density of 75.4 μA cm−2 were achieved for the composite film prepared by 20 min ultrasonic deposition. The composite film could be applied in photoelectrochemical anticorrosion, and could provide a better photocathodic protection effect on stainless steel in a corrosive NaCl solution than that provided by the pure TiO2 nanotube film.

Study on hydrophobic nano-titanium dioxide coatings for improvement in corrosion resistance of Type 316L stainless steel

Abstract Using ethyl acetoacetate (EAcAc) as a chelating agent, titanium dioxide (TiO2) sol with ultra-fine particles has been prepared and deposited on Type 316L (UNS S31603) stainless steel to form a nano-TiO2 coating by the dip-coating. A hydrothermal posttreatment method has been applied to obtain crack-free coatings and to optimize the surface structure and properties. A self-assembly of fluoroalkylsilane (denoted as FAS-13) has been conducted to enhance the hydrophobic property for the surface of the nano-TiO2 coatings. The particle sizes of TiO2 sol have been analyzed by ζ potential analysis, and the surface morphology, structure, and properties have been characterized by contract angle, x-ray diffraction (XRD), and scanning electron microscopy (SEM) measurements. The results have shown that the surface of coatings is porous, with approximately 375 nm thickness; the diameter of the particles of anatase TiO2 is uniform, in the range from 15 nm to 18 nm. The electrochemical tests have indicated that ...

Electrochemical corrosion behavior of copper clad laminate in NaCl solution

Abstract Comparing with pure copper, the corrosion behavior of copper clad laminate (CCL) in NaCl solution was studied by using linear polarization, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). It was shown that the CCL had a different corrosion behavior and showed a lower corrosion resistance compared with the pure copper. At low polarization potential, CCL dissolves through the formation of CuCl2–, which may be a determined step in the anodic process. And when the polarization potential increased, a porous film containing CuCl formed on the CCL surface, and the transportation of Cl– in the film became the controlling step in the corrosion process. An inductive loop at low frequency was observed in the EIS measurement, which was attributed to the modulation of CuCl film due to the competition between dissolution and growth processes on CCL surface.

Study on a Titanate Film and its Photocathodic Protection Effect for 403 Stainless Steel

Conference Name:Coatings for Corrosion Protection - 220th ECS Meeting. Conference Address: Boston, MA, United states. Time:October 9, 2011 - October 14, 2011.

Study on the corrosion behavior of reinforcing steel by electrochemical techniques and XPS

Conference Name:Corrosion General Poster Session - 220th ECS Meeting. Conference Address: Boston, MA, United states. Time:October 9, 2011 - October 14, 2011.