Role of Fibronectin on Staphylococcal Adherence to Metallic Surfaces Used as Models of Orthopaedic Devices

ABSTRACTThe role of the initial bacterial inoculates on the biocorrosion of API X52 pipeline steel coupons was evaluated by electrochemical noise technique. The experiments were performed under laboratory conditions using an aerobic bacteria identified as Achromobacter xylosoxidans. Inoculations in the interval strain of 1x104 – 1x108 CFU/ml were evaluated. Environmental scanning electron microscopy (ESEM) analysis was carried out to evaluate the corrosive effects induced on the API X52 electrodes. The results show that all corroded surfaces show sites of localized corrosion, however, the density of de sites of localized corrosion have different grades depending of the initial inoculation used during the experiments. The maximum density sites of localized corrosion were obtained in the experiments with 1x105 CFU/ml. From inoculates of 1x106 CFU/ml the density sites of localized corrosion diminished constantly. The results show that with inoculates over 1x106 CFU/ml, the oxygen demand for the bacterial strain limits the presence of oxygen available into the metallic surface to maintain the corrosion reactions. The results were supported by the EDX analysis of the corrosion products formed on the metallic surfaces where the oxygen peaks diminished as the bacterial inoculation increases.

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Transition from the boundary lubrication to scuffing – The role of metallic surfaces morphology

Wear ◽

10.1016/j.wear.2017.09.011 ◽

2017 ◽

Vol 392-393 ◽

pp. 39-49 ◽

Cited By ~ 2

Author(s):

Ł. Wojciechowski ◽

M. Wieczorowski ◽

T.G. Mathia

Keyword(s):

Boundary Lubrication ◽

Metallic Surfaces

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Theory of chemisorption on metallic surfaces: Role of intra-adsorbate Coulomb correlation and surface structure

Physical Review B ◽

10.1103/physrevb.14.4281 ◽

1976 ◽

Vol 14 (10) ◽

pp. 4281-4294 ◽

Cited By ~ 45

Author(s):

Brian Bell ◽

Anupam Madhukar

Keyword(s):

Surface Structure ◽

Coulomb Correlation ◽

Metallic Surfaces

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Atomistic Modeling of Corrosion Events at the Interface between a Metal and Its Environment

International Journal of Corrosion ◽

10.1155/2012/204640 ◽

2012 ◽

Vol 2012 ◽

pp. 1-13 ◽

Cited By ~ 26

Author(s):

Christopher D. Taylor

Keyword(s):

Chemical Reactions ◽

Metallic Surface ◽

Complex Nature ◽

Atomistic Modeling ◽

Metallic Surfaces ◽

Complex Process ◽

Metallic Interfaces ◽

Corrosion Science ◽

Corrosion Mechanisms

Atomistic simulation is a powerful tool for probing the structure and properties of materials and the nature of chemical reactions. Corrosion is a complex process that involves chemical reactions occurring at the interface between a material and its environment and is, therefore, highly suited to study by atomistic modeling techniques. In this paper, the complex nature of corrosion processes and mechanisms is briefly reviewed. Various atomistic methods for exploring corrosion mechanisms are then described, and recent applications in the literature surveyed. Several instances of the application of atomistic modeling to corrosion science are then reviewed in detail, including studies of the metal-water interface, the reaction of water on electrified metallic interfaces, the dissolution of metal atoms from metallic surfaces, and the role of competitive adsorption in controlling the chemical nature and structure of a metallic surface. Some perspectives are then given concerning the future of atomistic modeling in the field of corrosion science.

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