Visualization of early stages of corrosion processes by a chemographic method

Autor:	Mykhailo Yelizarov, Michael Elizarov
Rok vydání:	2006
Předmět:	Hydrogen Moisture Galvanic anode Metallurgy chemistry.chemical_element Surfaces and Interfaces General Chemistry Condensed Matter Physics Surfaces Coatings and Films Corrosion Metal chemistry visual_art Soil water Materials Chemistry Pitting corrosion visual_art.visual_art_medium Duralumin
Zdroj:	Surface and Interface Analysis. 38:263-266
ISSN:	1096-9918 0142-2421
DOI:	10.1002/sia.2276
Popis:	Corrosion of duralumin was studied in sandy soil conditions with different moisture and ion concentrations. The influence of these factors on initial (the first hours) corrosion stages was visualized by a chemographic method in which a film works as an indicator of the volatile products released during the electrode process, which may transform silver to the metallic state. Atomic hydrogen acts as such a product during metal corrosion. As a result, the pattern of optical density in a chemogram maps the corrosion activity of a specimen surface. The soil condition was checked by using its conductance. Two mechanisms of conductance were differentiated and analysed in terms of the percolation theory for low-moisture soil (
Databáze:	OpenAIRE
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