scholarly journals Soluble and Solid Iron Reduction Assays with Desulfitobacterium hafniense

BIO-PROTOCOL ◽  
2018 ◽  
Vol 8 (17) ◽  
Author(s):  
Lucrezia Comensoli ◽  
Julien Maillard ◽  
Wafa Kooli ◽  
Pilar Junier ◽  
Edith Joseph
Keyword(s):  
Iron Reduction ◽  
Solid Iron ◽  
Desulfitobacterium Hafniense

scholarly journals Investigation of Biogenic Passivating Layers on Corroded Iron

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1176
Author(s):  
Lucrezia Comensoli ◽  
Monica Albini ◽  
Wafa Kooli ◽  
Julien Maillard ◽  
Tiziana Lombardo ◽  
...  
Keyword(s):  
Cross Sections ◽  
Alternative Treatment ◽  
Atmospheric Corrosion ◽  
Iron Reduction ◽  
Corrosion Layer ◽  
Corrosion Products ◽  
Mineral Formation ◽  
Iron Phosphates ◽  
Continuous Layer ◽  
Desulfitobacterium Hafniense

This study evaluates mechanisms of biogenic mineral formation induced by bacterial iron reduction for the stabilization of corroded iron. As an example, the Desulfitobacterium hafniense strain TCE1 was employed to treat corroded coupons presenting urban natural atmospheric corrosion, and spectroscopic investigations were performed on the samples’ cross-sections to evaluate the corrosion stratigraphy. The treated samples presented a protective continuous layer of iron phosphates (vivianite Fe2+3(PO4)2·8H2O and barbosalite Fe2+Fe3+2(PO4)2(OH)2), which covered 92% of the surface and was associated with a decrease in the thickness of the original corrosion layer. The results allow us to better understand the conversion of reactive corrosion products into stable biogenic minerals, as well as to identify important criteria for the design of a green alternative treatment for the stabilization of corroded iron.

Direct observation of Fe-Al-Zn ternary intermetallic compound and its transformation during the early stage of hot-dip galvanizing

1993 ◽  
Vol 51 ◽  
pp. 1116-1117
Author(s):  
C. S. Lin ◽  
W. A. Chiou ◽  
M. Meshii
Keyword(s):  
Intermetallic Compound ◽  
Reaction Rate ◽  
Diffusion Rate ◽  
Early Stage ◽  
Zinc Bath ◽  
Steel Sheets ◽  
Direct Observations ◽  
Solid Iron ◽  
Iron And Zinc ◽  
Ternary Intermetallic Compound

The galvannealed steel sheets have received ever increased attention because of their excellent post-painting corrosion resistance and good weldability. However, its powdering and flaking tendency during press forming processes strongly impairs its performance. In order to optimize the properties of galvanneal coatings, it is critical to control the reaction rate between solid iron and molten zinc.In commercial galvannealing line, aluminum is added to zinc bath to retard the diffusion rate between iron and zinc by the formation of a thin layer of Al intermetallic compound on the surface of steel at initial hot-dip galvanizing. However, the form of this compound and its transformation are still speculated. In this paper, we report the direct observations of this compound and its transformation.The specimens were prepared in a hot-dip simulator in which the steel was galvanized in the zinc bath containing 0.14 wt% of Al at a temperature of 480 °C for 5 seconds and was quenched by liquid nitrogen.

PH DEPENDENT INTERACTIONS BETWEEN IRON REDUCTION AND METHANOGENESIS SUGGEST A NEW MODEL FOR METHANOGENESIS

2018 ◽  
Author(s):  
Matthew F. Kirk ◽  
◽  
Qusheng Jin ◽  
Theodore M. Flynn ◽  
Lydia H. Zeglin
Keyword(s):  
Iron Reduction ◽  
New Model ◽  
Ph Dependent

Effects and mechanisms of modified biochars on microbial iron reduction of Geobacter sulfurreducens

Chemosphere ◽  
2021 ◽  
pp. 130983
Author(s):  
Yue Lu ◽  
Yingju Hu ◽  
Lin Tang ◽  
Qingqing Xie ◽  
Qian Liu ◽  
...  
Keyword(s):  
Iron Reduction ◽  
Geobacter Sulfurreducens ◽  
Microbial Iron Reduction
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