Early stage of marine biofilm formation on duplex stainless steel

2020 ◽  
Vol 15 (4) ◽  
pp. 041014
Author(s):  
Elise Gardin ◽  
Sandrine Zanna ◽  
Antoine Seyeux ◽  
Dimitri Mercier ◽  
Audrey Allion-Maurer ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Biofilm Formation ◽  
Early Stage ◽  
Marine Biofilm

Interfacial Morphology of Duplex Stainless Steel Joints Brazed with Ni-Cr-Si-B Filler Metal

2004 ◽  
Vol 449-452 ◽  
pp. 889-892
Author(s):  
H.K. Lee ◽  
Chung Yun Kang ◽  
C.S. Woo ◽  
S.H. Kim ◽  
Dae Up Kim
Keyword(s):  
Stainless Steel ◽  
Diffusion Process ◽  
Duplex Stainless Steel ◽  
Base Metal ◽  
Volume Fraction ◽  
Early Stage ◽  
Solidification Process ◽  
Isothermal Solidification ◽  
Vacuum Furnace ◽  
Insert Metal

Microstructures of 0.18wt% nitrogen-contained duplex stainless steel, SUS329J3L brazed in a vacuum furnace of 10-4torr, have been investigated as a function of bonding temperatures (1453-1523K) and holding times (0-1.8ks). An amorphous alloy, MBF50 (Ni-19.5wt%Cr-7.3wt%Si -1.5wt%B), was used as an insert metal. At an early stage at 1453K and 1473k, a morphology change of the insert metal, BN and CrB phase appeared only at the joints. The BN and Cr-Si-N phase were observed at the interface of the joints brazed under other conditions. The volume fraction of BN increased rapidly at an early stage and decreased with increasing holding time. The phase seemed to have been formed by dissolution of the base metal and the diffusion process. BN was formed easily due to the lowest Gibbs free energy. Boron content in liquid insert metal becomes low due to the formation of a large number of BNs at the bonded interlayer by holding for a few minutes at brazing temperature. This caused the rapid isothermal solidification of the liquid insert metal. Thus, it is clear that the isothermal solidification process of this bonding is controlled by the formation of boron nitrides as opposed to the diffusion process of depressant elements(B and Si) in the base metal.

scholarly journals Inhibition of the Early Stage of Salmonella enterica Serovar Enteritidis Biofilm Development on Stainless Steel by Cell-Free Supernatant of a Hafnia alvei Culture

2010 ◽  
Vol 76 (6) ◽  
pp. 2018-2022 ◽  
Author(s):  
Nikos G. Chorianopoulos ◽  
Efstathios D. Giaouris ◽  
Yiannis Kourkoutas ◽  
George-John E. Nychas
Keyword(s):  
Stainless Steel ◽  
Salmonella Enterica ◽  
Biofilm Formation ◽  
Early Stage ◽  
Planktonic Cells ◽  
Salmonella Enterica Serovar Enteritidis ◽  
Hafnia Alvei ◽  
Initial Stage ◽  
Biofilm Development ◽  
Cell Free Culture Supernatant

ABSTRACT Compounds present in Hafnia alvei cell-free culture supernatant cumulatively negatively influence the early stage of biofilm development by Salmonella enterica serovar Enteritidis on stainless steel while they also reduce the overall metabolic activity of S. Enteritidis planktonic cells. Although acylhomoserine lactones (AHLs) were detected among these compounds, the use of several synthetic AHLs was not able to affect the initial stage of biofilm formation by this pathogen.

Identification by Electron Microdiffraction of Intermetallic Phases in a Duplex Stainless Steel

1990 ◽  
Vol 48 (2) ◽  
pp. 494-495
Author(s):  
A. Redjaïmia ◽  
J.P. Morniroli ◽  
G. Metauer ◽  
M. Gantois
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Convergent Beam Electron Diffraction ◽  
Intermetallic Phases ◽  
Small Particles ◽  
Parallel Beam ◽  
Diffraction Patterns ◽  
Average Size ◽  
Convergent Beam ◽  
Electron Microdiffraction

2D and especially 3D symmetry information required to determine the crystal structure of four intermetallic phases present as small particles (average size in the range 100-500nm) in a Fe.22Cr.5Ni.3Mo.0.03C duplex stainless steel is not present in most Convergent Beam Electron Diffraction (CBED) patterns. Nevertheless it is possible to deduce many crystal features and to identify unambiguously these four phases by means of microdiffraction patterns obtained with a nearly parallel beam focused on a very small area (50-100nm).From examinations of the whole pattern reduced (RS) and full (FS) symmetries the 7 crystal systems and the 11 Laue classes are distinguished without ambiguity (1). By considering the shifts and the periodicity differences between the ZOLZ and FOLZ reflection nets on specific Zone Axis Patterns (ZAP) which depend on the crystal system, the centering type of the cell and the glide planes are simultaneously identified (2). This identification is easily done by comparisons with the corresponding simulated diffraction patterns.

DETECTION OF THE SIGMA PHASE IN A DUPLEX STAINLESS STEEL THROUGH MEASUREMENTS OF MAGNETIC PERMEABILITY

2019 ◽  
Author(s):  
Edgard Silva ◽  
Francisco Eduardo Mendes da Silva ◽  
Amanda Medeiros ◽  
Ana Paula Alves Pacheco ◽  
IZAURA VIEGAS ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Magnetic Permeability ◽  
Sigma Phase

Metallurgical investigation of electron beam welded duplex stainless steel X2CrNiMoN22-5-3 with plasma nitrided weld edge surfaces

2018 ◽  
Vol 60 (6) ◽  
pp. 577-582
Author(s):  
Sergii Krasnorutskyi ◽  
Christian Kipp ◽  
Jonas Hensel ◽  
Peter Kaestner ◽  
Sven Hartwig ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Beam ◽  
Duplex Stainless Steel ◽  
Metallurgical Investigation ◽  
Weld Edge

Microstructure characterization and corrosion testing of MAG pulsed duplex stainless steel welds

2017 ◽  
Vol 59 (7-8) ◽  
pp. 642-646 ◽  
Author(s):  
Ion Mitelea ◽  
Ion Dragoş Uţu ◽  
Sorin Dumitru Urlan ◽  
Olimpiu Karancsi
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Microstructure Characterization ◽  
Corrosion Testing ◽  
Steel Welds

ZERON 100

Alloy Digest ◽  
1993 ◽  
Vol 42 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Duplex Stainless Steel ◽  
Heat Treating ◽  
Super Duplex Stainless Steel ◽  
Corrosion Performance ◽  
Temperature Performance ◽  
Offshore Oil

Abstract ZERON 100 is a super duplex stainless steel which is manufactured to give a guaranteed corrosion performance by using an equation to control the chemistry in those elements which will determine the corrosion resistance of the material. Major usages in seawater applications, particularly offshore oil gathering systems. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance as well as heat treating, machining, and joining. Filing Code: SS-555. Producer or source: Weir Material Services Ltd.

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