期刊
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
卷 105, 期 1, 页码 222-229出版社
WILEY
DOI: 10.1002/jbm.b.33518
关键词
biocorrosion; sulfate-reducing bacteria; Desulfotomaculum nigrificans; FIB-SEM; aphelion
资金
- National Centre for Research and Development (Poland) [N R15 0117 10/NCBR]
Corrosion processes of metallic biomaterials in the oral cavity pose a significant limitation to the life and reliable functioning of dental materials. In this article, the influence of environment bacteria Desulfotomaculum nigrificans sulfate reducing bacteria on the corrosion processes of 316LV steel was assessed. After 14 and 28 days of contact of the material with the bacterial environment, the surfaces of the tested biomaterial were observed by means of confocal scanning laser microscopy, and their chemical composition was studied using X-Ray Photoelectron Spectrometry and a scanning transmission electron microscopy. Corrosive changes, the presence of sulfur (with atomic concentration of 0.5%) on the surface of the biomaterial and the presence of a thin oxide layer (thickness of approximate to 20 nm) under the surface of the steel were observed. This corrosion layer with significant size reduction of grains was characterized by an increased amount of oxygen (18% mas., p<0.001) in comparison to untreated 316LV steel (where oxygen concentration-10% mas.). Image analysis conducted using APHELION software indicated that corrosion pits took up approximate to 2.8% of the total tested surface. The greatest number of corrosion pits had a surface area within the range of 100-200 m(2). (c) 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 222-229, 2017.
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