نتایج جستجو برای: cerium oxide conversion coatings

تعداد نتایج: 308427  

Journal: :Bulletin of The Chemical Society of Ethiopia 2023

ABSTRACT. In this study, zirconium oxide (ZrO)-cerium (CeO) based composite coatings were fabricated using doctor blade method to protect pure magnesium from corrosion. The effects of ZrO and CeO on corrosion resistance investigated Tafel polarization method. Uniform deposition coating without micro-voids was observed scanning electron microscopy (SEM) analysis. results exhibit that the additio...

2015
Vellaisamy Selvaraj Niraj Nepal Steven Rogers Nandini D.P.K. Manne Ravikumar Arvapalli Kevin M. Rice Shinichi Asano Erin Fankenhanel J.Y. Ma Tolou Shokuhfar Mani Maheshwari Eric R. Blough

The life threatening disease of sepsis is associated with high mortality. Septic patient survivability with currently available treatments has failed to improve. The purpose of this study was to evaluate whether lipopolysaccharide (LPS) induced sepsis mortality and associated hepatic dysfunction can be prevented by cerium oxide nanoparticles (CeO2NPs) treatment in male Sprague Dawley rats. Here...

2003
Zhijiang Li Maria Flytzani-Stephanopoulos

A new catalyst comprising cerium and silver ion-exchanged ZSM-5 zeolite is reported in this paper, for the reduction of nitric oxide by methane in the presence of excess oxygen. The bi-cation exchanged Ce-Ag-ZSM-5 catalyst was very active for this reaction, while either Ce-ZSM-5 or Ag-ZSM-5 alone showed low activity. The presence of oxygen in the feed gas mixture enhanced the activity of the ca...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2010
William C Chueh Sossina M Haile

We present a comprehensive thermodynamic and kinetic analysis of the suitability of cerium oxide (ceria) for thermochemical fuel production. Both portions of the two-step cycle, (i) oxygen release from the oxide at 1773 and 1873 K under inert atmosphere, and (ii) hydrogen release upon hydrolysis at 1073 K, are examined theoretically as well as experimentally. We observe gravimetric fuel product...

Journal: :Science 2010
William C Chueh Christoph Falter Mandy Abbott Danien Scipio Philipp Furler Sossina M Haile Aldo Steinfeld

Because solar energy is available in large excess relative to current rates of energy consumption, effective conversion of this renewable yet intermittent resource into a transportable and dispatchable chemical fuel may ensure the goal of a sustainable energy future. However, low conversion efficiencies, particularly with CO(2) reduction, as well as utilization of precious materials have limite...

Journal: :Materials & Design 2021

Abstract The depreciation of assets and safety threats because corrosion has forced to develop eco-friendly smarter protection strategies. In this study, natural Gum Arabic (GA) was used as a inhibitor loaded into cerium oxide nanoparticles (CONPs) an environment-friendly additive for coated steel in the marine environment. This uniformly dispersed epoxy formulation that protect plates. Epoxy c...

Journal: :Metals 2021

The selection of appropriate surface pretreatments is one the pending issues for industrial application cerium-based chemical conversion coatings (CeCC) as an alternative toxic chromate coating (CrCC). A two-step pretreatment based on commercial products has been successfully used here to obtain CeCC AA2024-T3 and AA7075-T6. Specimens processed 1 15 min in solutions containing CeCl3 H2O2 have s...

2005
Heejung Jung David B. Kittelson Michael R. Zachariah

The influence of a cerium additive on the kinetics of oxidation and size distribution of ultrafine diesel particles was studied using a high-temperature oxidation-tandem differential mobility analysis method over the temperature range 300–700 ◦C. The addition of cerium to the diesel fuel was observed to cause significant changes in numberweighted size distributions, light-off temperature, and k...

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