Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Corrosion behavior of galvanized steel due to typical soil organics
Highlights Organic content should not be treated as a single entity in soil corrosion studies. Corrosion behavior of galvanized steel depends on the composition of soil organics. Citric acid is able to completely dissolve the protective zinc layer. Increasing content of humic and oxalic acids form layers that block corrosion.
Abstract The corrosion behavior of galvanized steel due to organics typically found in soils is addressed in this exploratory study by means of the open circuit potential and the potentiodynamic polarization tests in solutions of humic compounds, carbohydrates, and carboxylic acids. Subsequently, the surface is characterized with Scanning Electron Microscope and Energy Dispersive X-ray Spectroscopy. The data shows that the corrosion effect of organic matter depends on its composition and concentration. Citric acid is the most corrosive organic. Humic acid and oxalic acid produce higher current densities at the lowest concentrations and promote the formation of physical barriers at higher concentrations that reduce exposure to the corrosive environment.
Corrosion behavior of galvanized steel due to typical soil organics
Highlights Organic content should not be treated as a single entity in soil corrosion studies. Corrosion behavior of galvanized steel depends on the composition of soil organics. Citric acid is able to completely dissolve the protective zinc layer. Increasing content of humic and oxalic acids form layers that block corrosion.
Abstract The corrosion behavior of galvanized steel due to organics typically found in soils is addressed in this exploratory study by means of the open circuit potential and the potentiodynamic polarization tests in solutions of humic compounds, carbohydrates, and carboxylic acids. Subsequently, the surface is characterized with Scanning Electron Microscope and Energy Dispersive X-ray Spectroscopy. The data shows that the corrosion effect of organic matter depends on its composition and concentration. Citric acid is the most corrosive organic. Humic acid and oxalic acid produce higher current densities at the lowest concentrations and promote the formation of physical barriers at higher concentrations that reduce exposure to the corrosive environment.
Corrosion behavior of galvanized steel due to typical soil organics
Soriano, Claudia (Autor:in) / Alfantazi, Akram (Autor:in)
Construction and Building Materials ; 102 ; 904-912
01.11.2015
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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