In situ Evolution of Trivalent Chromium Process Passive Film on Al in a Corrosive Aqueous Environment

2011 ◽  
Vol 3 (11) ◽  
pp. 4206-4214 ◽  
Author(s):  
Xuecheng Dong ◽  
Sandip Argekar ◽  
Peng Wang ◽  
Dale W. Schaefer
Keyword(s):  
Passive Film ◽  
Trivalent Chromium ◽  
Aqueous Environment

scholarly journals Ex-situ and in-situ spectroscopic studies of the passive film on alkali and alkaline earth metals in nonaqueous solvents. Final report

1992 ◽  
Author(s):  
K. Wang ◽  
G.S. Chottiner ◽  
P. Herrera-Fierro ◽  
D.A. Scherson
Keyword(s):  
Passive Film ◽  
Alkaline Earth ◽  
Spectroscopic Studies ◽  
Nonaqueous Solvents ◽  
Alkaline Earth Metals ◽  
Ex Situ ◽  
Final Report

scholarly journals Hydrogen Peroxide Generation of Copper/Ascorbate Formulations on Cotton: Effect on Antibacterial and Fibroblast Activity for Wound Healing Application

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2399 ◽  
Author(s):  
J. Edwards ◽  
Nicolette Prevost ◽  
Michael Santiago ◽  
Terri von Hoven ◽  
Brian Condon ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Wound Healing ◽  
Cotton Fiber ◽  
Cotton Effect ◽  
Aqueous Environment ◽  
Amplex Red ◽  
Low Levels ◽  
Icp Analysis ◽  
Hydrogen Peroxide Generation

Greige cotton (unbleached cotton) is an intact plant fiber that retains much of the outer cotton fiber layers. These layers contain pectin, peroxidases, and trace metals that are associated with hydrogen peroxide (H2O2) generation during cotton fiber development. When greige cotton is subjected to a nonwoven hydroentanglement process, components of the outer cotton fiber layers are retained. When hydrated, this fabric can generate H2O2 (5–50 micromolar). This range has been characterized as inducing accelerated wound healing associated with enhanced cell signaling and the proliferation of cells vital to wound restoration. On the other hand, H2O2 levels above 50 micromolar have been associated with bacteriostatic activity. Here, we report the preparation and hydrogen peroxide activity of copper/ascorbate formulations, both as adsorbed and in situ synthesized analogs on cotton. The cooper/ascorbate-cotton formulations were designed with the goal of modulating hydrogen peroxide levels within functional ranges beneficial to wound healing. The cotton/copper formulation analogs were prepared on nonwoven unbleached cotton and characterized with cotton impregnation titers of 3–14 mg copper per gram of cotton. The copper/ascorbate cotton analog formulations were characterized spectroscopically, and the copper titer was quantified with ICP analysis and probed for peroxide production through assessment with Amplex Red. All analogs demonstrated antibacterial activity. Notably, the treatment of unbleached cotton with low levels of ascorbate (~2 mg/g cotton) resulted in a 99 percent reduction in Klebsiella pneumoniae and Staphylococcus aureus. In situ synthesized copper/ascorbate nanoparticles retained activity and did not leach out upon prolonged suspension in an aqueous environment. An assessment of H2O2 effects on fibroblast proliferation are discussed in light of the copper/cotton analogs and wound healing.

In Situ X‐Ray Absorption Near Edge Structure Study of the Potential Dependence of the Formation of the Passive Film on Iron in Borate Buffer

1997 ◽  
Vol 144 (7) ◽  
pp. 2398-2404 ◽  
Author(s):  
L. J. Oblonsky ◽  
A. J. Davenport ◽  
M. P. Ryan ◽  
H. S. Isaacs ◽  
R. C. Newman
Keyword(s):  
Passive Film ◽  
Structure Study ◽  
Borate Buffer ◽  
Edge Structure ◽  
X Ray ◽  
Potential Dependence ◽  
X Ray Absorption

In-situ XAFS and SERS study of self-healing of passive film on Ti in Hank's physiological solution

2019 ◽  
Vol 496 ◽  
pp. 143657 ◽  
Author(s):  
Lu Wang ◽  
Hongying Yu ◽  
Shaoyang Wang ◽  
Lei Qiao ◽  
Dongbai Sun
Keyword(s):  
Passive Film ◽  
Physiological Solution ◽  
Self Healing ◽  
In Situ Xafs

scholarly journals In Situ Electrochemical Study of the Growth Kinetics of Passive Film on TC11 Alloy in Sulfate Solution at 300 °C/10 MPa

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1135 ◽  
Author(s):  
Lei Zha ◽  
Heping Li ◽  
Ning Wang
Keyword(s):  
Passive Film ◽  
Growth Kinetics ◽  
Electrochemical Behavior ◽  
Electrochemical Impedance ◽  
Sulfate Solution ◽  
Open Circuit ◽  
Hydrothermal Systems ◽  
Wide Range ◽  
Kinetics Of

TC11 alloy is a promising structural material, and has a wide range of applications in many corrosive and high temperature hydrothermal systems. The passive film has an important influence on its electrochemical behavior. In this study, in-situ electrochemical methods (that is, open circuit potential (OCP), linear polarization (LP) and electrochemical impedance spectroscopy (EIS)) were used to monitor the long period electrochemical behavior of TC11 alloy in 0.01 M Na2SO4 solution at 300 °C/10 MPa. The growth kinetics of the passive film was mainly studied. The correlation between the evolution of the electrochemical behavior and the growth of the oxide film was discussed. The results showed that although the OCP gradually stabilized after twenty thousand seconds, henceforth the polarization resistance (Rp) was still increasing due to the thickening of the passive film. An equivalent circuit was proposed to fit the EIS experimental data, leading to determination of film capacitance and film resistance. Besides, the electrochemical data was interpreted in terms of the point defect model (PDM). The EIS results are consistent with the Rp results.

Electrochemical and in-situ SERS Study of Passive Film Characteristics and Corrosion Performance of 9%Cr Microcomposite Steel in Highly Alkaline Environments

2009 ◽  
Vol 6 (5) ◽  
pp. 101903 ◽  
Author(s):  
M. Mancio ◽  
G. Kusinski ◽  
P. J. M. Monteiro ◽  
T. M. Devine ◽  
Sean Brossia ◽  
...  
Keyword(s):  
Passive Film ◽  
Corrosion Performance ◽  
Alkaline Environments ◽  
Film Characteristics

In-Situ Transmission Electron Microscopy of Liposomes in an Aqueous Environment

Langmuir ◽  
2013 ◽  
Vol 29 (32) ◽  
pp. 9958-9961 ◽  
Author(s):  
Sarah M. Hoppe ◽  
Darryl Y. Sasaki ◽  
Aubrianna N. Kinghorn ◽  
Khalid Hattar
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Aqueous Environment ◽  
Transmission Electron

In Situ STM Study of the Effect of Chloride on Passive Film on Nickel in Alkaline Solution

2006 ◽  
Vol 153 (11) ◽  
pp. B453 ◽  
Author(s):  
A. Seyeux ◽  
V. Maurice ◽  
L. H. Klein ◽  
P. Marcus
Keyword(s):  
Passive Film ◽  
Alkaline Solution ◽  
In Situ Stm

In situ Electron Microscopy Investigation of Fe(III)-doped TiO2Nanoparticles in an Aqueous Environment

2004 ◽  
Vol 6 (1) ◽  
pp. 119-122 ◽  
Author(s):  
Chuan-yi Wang ◽  
Christoph Böttcher ◽  
Detlef W. Bahnemann ◽  
Jürgen K. Dohrmann
Keyword(s):  
Electron Microscopy ◽  
Aqueous Environment ◽  
In Situ Electron Microscopy ◽  
Microscopy Investigation ◽  
Electron Microscopy Investigation
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