Ag/Zn Galvanic Couple Cotton Nonwovens with Breath-Activated Electroactivity: A Possible Antibacterial Layer for Personal Protective Face Masks

2021 ◽  
Author(s):  
Yujie Feng ◽  
Na Wang ◽  
Tian He ◽  
Ruidong He ◽  
Meng Chen ◽  
...  
Keyword(s):  
Galvanic Couple

A Combined Experiment and Modeling Analysis of ASTM G85 WB Accelerated Corrosion Testing of Galvanically Coupled Sensitized AA5456-H116 and CDA 706 Cupronickel

CORROSION ◽  
10.5006/3852 ◽  
2021 ◽  
Author(s):  
Lindsey Blohm ◽  
Chao Liu ◽  
Robert Kelly
Keyword(s):  
Water Layer ◽  
High Water ◽  
Product Formation ◽  
Localized Corrosion ◽  
Accelerated Corrosion ◽  
Galvanic Couple ◽  
Modeling Analysis ◽  
Accelerated Corrosion Testing ◽  
Water Layers ◽  
Best Fit

AA5456-H116 undergoes accelerated localized corrosion when in a galvanic couple with cupronickel alloy C70600 during ASTM G85 Appendix 2 Wet Bottom (G85 WB) testing. Surface and subsurface damage of AA5456-H116 was investigated and quantified. These results were compared to Finite Element Modeling results investigating relative humidity (RH) and water layer (WL) thickness. The best fit between experimental results and the modeling results was found when modeling assumed that a 3,000 µm water layer was formed during the spray portion of the G85 cycle with thinner water layers present during the decreasing RH portion of the cycle, which led IGC attack that was focused in the proximity of the CDA/AA5456-H116 interface. The high-water layer thickness is likely the result of the corrosion product formation that traps additional electrolyte than would be present on a clean surface.

scholarly journals Documentation of the Corrosion of Composite-Extruded Aluminium Matrix Extrusions Using the Push-Out Test

2008 ◽  
Vol 43 ◽  
pp. 17-22 ◽  
Author(s):  
Matthias Merzkirch ◽  
Kay André Weidenmann ◽  
Eberhard Kerscher ◽  
Detlef Löhe
Keyword(s):  
Shear Strength ◽  
High Strength ◽  
Spring Steel ◽  
Aluminium Matrix ◽  
Corrosive Media ◽  
Corrosive Attack ◽  
Galvanic Couple ◽  
Space Frames ◽  
Push Out

A possibility to increase both stiffness and strength of aluminium-based structures for the application in lightweight profiles for vehicle space frames is the use of composite extrusions in which high-strength metallic reinforcements are incorporated. Within the scope of the present investigations, composite-extruded profiles with wire-reinforcements made of austenitic spring steel 1.4310 (X10CrNi18-8), in an aluminium matrix AA6060 (AlMgSi0.5), which were exposed to different corrosive media for different times, were characterised in terms of the debonding shear strength using the push-out-technique. The formation of a galvanic couple could be conceived mathematically in regard of terms describing the formation of a shear-impeding layer and the corrosive attack. Thereby the parameters for the different media could be determined.

scholarly journals Hydrothermal–galvanic couple synthesis of directionally oriented BaTiO3 thin films on TiN-coated substrates

2013 ◽  
Vol 542 ◽  
pp. 108-113 ◽  
Author(s):  
Chia-Jung Yang ◽  
Di-You Tsai ◽  
Pei-Hsuan Chan ◽  
Chu-Tsun Wu ◽  
Fu-Hsing Lu
Keyword(s):  
Thin Films ◽  
Galvanic Couple

EIS Characteristics of Galvanic Couple of Aluminum Alloy and High-strength Steel under Thin Solution Films

2020 ◽  
Vol 167 (13) ◽  
pp. 131507
Author(s):  
Van Nam Tran ◽  
Azusa Ooi ◽  
Eiji Tada ◽  
Atsushi Nishikata
Keyword(s):  
Aluminum Alloy ◽  
High Strength Steel ◽  
High Strength ◽  
Galvanic Couple

Corrosion Inhibition of Steel by Lead Pigments: The Steel–Lead Galvanic Couple in Acetate Solutions

CORROSION ◽  
1989 ◽  
Vol 45 (8) ◽  
pp. 631-636 ◽  
Author(s):  
J. I. Mickalonis ◽  
H. Leidheiser
Keyword(s):  
Corrosion Inhibition ◽  
Galvanic Couple

Degradation of Al/SiCp Composites Processed with Fly Ash via Reactive Infiltration

2007 ◽  
Vol 560 ◽  
pp. 139-144
Author(s):  
Rodrigo Escalera-Lozano ◽  
Carlos A. Gutiérrez-Chavarría ◽  
Max A. Pech-Canul ◽  
Martin I. Pech-Canul
Keyword(s):  
Fly Ash ◽  
Degradation Products ◽  
Galvanic Corrosion ◽  
Argon Atmosphere ◽  
Ambient Atmosphere ◽  
Ir Absorption ◽  
Atmospheric Moisture ◽  
Reactive Infiltration ◽  
Galvanic Couple ◽  
Second Phases

The degradation in ambient atmosphere of Al/SiCp composites prepared by the reactive infiltration of SiCp preforms containing fly ash has been investigated. SiCp/fly-ash preforms in the form of plates (3 cm x 4 cm x 0.5 cm) with 50 % porosity are infiltrated by an Al- 8 Si-15 Mg (wt. %) alloy under argon atmosphere at 1050, 1100 and 1150 °C, for 50, 60 and 70 min. Characterization by XRD, SEM and EDX of composite specimens shortly after processing do not reveal the presence of the unwanted Al4C3 phase. However, in addition to Al, Si and SiC, MgAl2O4 and Mg2Si phases are detected. One month after the infiltration trials, white and gray powders are present on the composite specimens, accompanied by pitting corrosion and cracks which propagate with time. Although analysis by XRD of the degradation products reveals only Al4C3 in addition to the above mentioned phases, results from SEM, IR absorption and ICP also suggest the presence of Al(OH)3 and Mg(OH)2, probably from the interaction of Al4C3 and Mg2Si with water. It is considered that Mg2Si in the powders acts as an anode in a galvanic couple with atmospheric moisture as the electrolyte. The crack pathway through SiC, intermetallic AlFeMnSi and Si rich zones implies that one or more of these phases worked as the cathode. In summary, degradation of the composites is explained by the combined effect of galvanic corrosion caused by second phases and the interaction of Al4C3 with atmospheric moisture.

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