Theory of core-hole-decay dynamics of adsorbates on metal surfaces: Role of the 2π*level of a chemisorbed CO molecule

1992 ◽  
Vol 45 (7) ◽  
pp. 3755-3768 ◽  
Author(s):  
H. Ueba
Keyword(s):  
Metal Surfaces ◽  
Core Hole

Trends in water-promoted oxygen dissociation on the transition metal surfaces from first principles

2017 ◽  
Vol 19 (3) ◽  
pp. 2364-2371 ◽  
Author(s):  
Ming Yan ◽  
Zheng-Qing Huang ◽  
Yu Zhang ◽  
Chun-Ran Chang
Keyword(s):  
Transition Metal ◽  
First Principles ◽  
Metal Surfaces ◽  
Oxygen Dissociation ◽  
Transition Metal Surfaces

The trend of O2 dissociation on the nine transition metal surfaces and the promotional role of water were systematically investigated.

scholarly journals A review of fungal influenced corrosion of metals

2021 ◽  
Vol 62 (4) ◽  
pp. 333-339
Author(s):  
Imo Okorie ◽  
Romanus Nwokorie
Keyword(s):  
Growth Pattern ◽  
Metal Surfaces ◽  
Structural Integrity ◽  
Great Influence ◽  
Fungal Growth ◽  
Corrosive Media ◽  
Electrochemical Processes ◽  
Single Mechanism ◽  
Growth Of Fungi

The growth of fungi on the surface of metals has great influence on their structural integrity and failure. Their growth on metal surfaces is determined by their secreted metabolites which enable them to adapt to new environmental and nourishment conditions. Although information on the capacity of fungi to adapt to metal surfaces is scarce, most fungi growing on metal surfaces alter the composition of the metals involving it in the process of functional growth and metabolism. Changes in the composition and colour of the metals are some of the evidences confirming that fungus has penetrated the metal surfaces and use it to satisfy its nutritional need with resultant corrosion. In this work we tried to explain different mechanisms of fungal influenced corrosion from different perspectives ranging from the role of biofilms, corrosive media generation by fungal metabolism processes to electrochemical processes generated by fungal growth on metal surfaces. Finally, no single mechanism can conclusively explain all forms of fungal influenced corrosion because every mechanism is unique and applies to individual fungus, its metabolic biproducts or the growth pattern.

Experiments and Molecular Simulations to Study the Role of Coadsorption of Oil in Corrosion Inhibitor Films in Improving Corrosion Mitigation

CORROSION ◽  
10.5006/3606 ◽  
2020 ◽  
Vol 76 (11) ◽  
Author(s):  
Xueying Ko ◽  
Juan Dominguez Olivo ◽  
Bruce Brown ◽  
Srdjan Nešić ◽  
Sumit Sharma
Keyword(s):  
Aqueous Solution ◽  
Corrosion Inhibitor ◽  
Metal Surfaces ◽  
Laboratory Experiments ◽  
Field Experience ◽  
Molecular Simulations ◽  
Self Assembled Monolayer ◽  
Polar Head ◽  
Self Assembled

While both field experience and laboratory experiments have shown that the efficiency of adsorbed corrosion inhibitor films improves upon exposure of the aqueous solution to a hydrocarbon phase, a credible explanation of these results is lacking. Using a combination of experiments and molecular simulations, this study examines how exposure to oil molecules affects the nature of adsorbed corrosion inhibitor films on metal surfaces. It is found that oil molecules get coadsorbed in the corrosion inhibitor films, making them more hydrophobic, structurally more ordered, and well packed. Corrosion inhibitor molecules with a bulky polar head adsorb in nonplanar, cylinder-like morphologies. Coadsorption of oil molecules changes the morphology of these films to a planar self-assembled monolayer.

The role of tunneling in precursor mediated dissociation: Alkanes on metal surfaces

1992 ◽  
Vol 96 (9) ◽  
pp. 7054-7063 ◽  
Author(s):  
A. C. Luntz ◽  
J. Harris
Keyword(s):  
Metal Surfaces
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