Modeling Corrosion of a Metal under an Aerosol Droplet

2010 ◽  
Vol 654-656 ◽  
pp. 1650-1653 ◽  
Author(s):  
Murali Sankar Venkatraman ◽  
Ivan S. Cole ◽  
Dayalan R. Gunasegaram ◽  
Bosco Emmanuel
Keyword(s):  
Metal Surface ◽  
Atmospheric Corrosion ◽  
Three Dimensional ◽  
Spatial Separation ◽  
Temporal Variations ◽  
Transient Model ◽  
Aerosol Droplet ◽  
Current Densities ◽  
Spatio Temporal ◽  
Kinetics Of

On a metal surface covered with a moisture layer of variable thickness and shape, the dissolved oxygen may induce a spatial separation of the anodic and cathodic reactions on space-time scales characteristic of the roughness, droplet size and the local kinetics of the system. This leads to a spatio-temporal variations in species concentrations, current and potential over the metal surface and thus atmospheric corrosion. Here a fully three-dimensional transient model is developed that addresses the corrosion of a metal under an aerosol droplet. The effects of various parameters, such as exchange current densities, initial concentrations, shape and size of the droplet, and diffusivity of oxygen on ionic, potential and current distributions are investigated.

Simulating and Mapping the Variations of Solar Radiation at the Lujiazui Region of Shanghai Using Airborne LiDAR Data

2012 ◽  
Vol 500 ◽  
pp. 511-516 ◽  
Author(s):  
Zhi Ming Hu ◽  
Jian Ping Wu ◽  
Bin Wu ◽  
Song Shu ◽  
Bai Lang Yu
Keyword(s):  
Solar Radiation ◽  
Three Dimensional ◽  
Temporal Variations ◽  
Airborne Lidar ◽  
Lidar Data ◽  
Total Solar Radiation ◽  
Solar Radiation Intensity ◽  
Flux Model ◽  
Spatio Temporal ◽  
Airborne Lidar Data

This study utilizes high resolution airborne LiDAR data and topographic solar radiation model to quantify the impacts of three-dimensional morphology on the spatio-temporal variations of solar radiation at the Lujiazui Region, Shanghai, China. Monthly direct and non-direct (diffuse and reflection) plus seasonal total solar radiation distributions are simulated and mapped by using a radiation flux model. The results show that the crowded buildings at the Lujiazui Region have severely changed the spatial pattern of solar radiation intensity and duration. The derived monthly and seasonal solar radiation maps would benefit the understanding of the impacts of urban 3D morphology on the environmental factors and be the scientific basic for the further research.

scholarly journals Investigation of the inhibitory-bactericidal effect of amidoamine-based inorganic complexes against microbiological and atmospheric corrosion

2020 ◽  
Vol 22 (3) ◽  
pp. 29-37
Author(s):  
Y.J. Aghazada ◽  
V.M. Abbasov ◽  
N.I. Mursalov ◽  
S.E. Abdullayev ◽  
U.J. Yolchuyeva
Keyword(s):  
Metal Surface ◽  
Atmospheric Corrosion ◽  
Isopropyl Alcohol ◽  
Bactericidal Effect ◽  
Corrosion Process ◽  
Inorganic Complexes ◽  
Correlation Constant ◽  
Reducing Bacteria ◽  
Kinetics Of ◽  
Petroleum Acid

AbstractIn the process, inorganic complexes of amidoamines obtained from the interaction of natural petroleum acid and oleic acids with diethylenetriamine have been developed and their effectiveness as inhibitor-bactericides has been investigated. The effect of the synthesized reagents on the kinetics of the corrosion process of steel and the activity of sulphate-reducing bacteria in 3% NaCl solution saturated with CO2 and in the biphasic water–isopropyl alcohol medium with H2S dissolved has been analyzed. The thermodynamic and kinetic parameters of the corrosion process were calculated. The adsorption of the complexes was investigated using the Langmuir isotherm and the correlation constant was determined. State of the metal surface was investigated by SEM method in CO2 and H2S media, with and without inhibitors, and the metal surface contact of complexes was studied by computer molecular simulation.

Spatio-temporal variations of winter wheat water requirement and climatic causes in Huang-Huai-Hai Farming Region

2012 ◽  
Vol 20 (3) ◽  
pp. 356-362 ◽  
Author(s):  
Xiao-Lin YANG ◽  
Zhen-Wei SONG ◽  
Hong WANG ◽  
Quan-Hong SHI ◽  
Fu CHEN ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Temporal Variations ◽  
Water Requirement ◽  
Spatio Temporal

ASSESSMENT OF THE SPATIO-TEMPORAL VARIATIONS IN GROUND WATER STORAGE USING DOWN-SCALED GRACE DATA

2018 ◽  
Author(s):  
Hossein Sahour ◽  
◽  
Mohamed Sultan ◽  
Karem Abdelmohsen ◽  
Sita Karki ◽  
...  
Keyword(s):  
Ground Water ◽  
Water Storage ◽  
Temporal Variations ◽  
Grace Data ◽  
Spatio Temporal
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