Search
Filters
Close

Save up to 75% off Clearance Books.  No promo code needed.  Shop Now

Interfacial and Corrosion Characterization of Zinc Rich-Epoxy Primers with Carbon Nanotubes Exposed to Marine Bacteria

In this work, a marine environment due to the presence of marine bacteria was exposed to three zinc-rich epoxy coated-steel samples with different carbon nanotube additions. The electrochemical activity was monitored by using open circuit potential and electrochemical impedance spectroscopy.

 

Product Number: 51317--9465-SG
ISBN: 9465 2017 CP
Author: Homero Castaneda-Lopez
Publication Date: 2017
$0.00
$20.00
$20.00

Electrochemical and corrosion characterization of different inorganic coated-steel under influence of marine biofilm formationM. Galicia1 V. Valencia1 M. Aguirre H. Castaneda2*1Departamento de Química Universidad Autónoma de Ciudad Juárez Instituto de Ciencias Biomédicas Juárez CH 32300 México.2Department of Materials Science and Engineering Dwight Look College of Engineering Texas A&M University College Station TX 77843-3003*Corresponding author.E-mail address: hcastaneda@tamu.eduAbstractNowadays it is generally accepted that in aerobic conditions marine electroactive biofilms induce faster oxygen reduction on active passive alloys immersed in seawater. Besides in natural seawater this alloys undergo a shift of open circuit potentials (OCP) towards noble direction after biofilm settlement OCP can be shifted up to ?350 mV vs. SCE. This latter is common for bare steel alloys while for inorganic coatings (with Zinc Aluminum and Magnesium contents) has not been explored in detail. For marine environments the active/passive characteristics relies on kinetic mechanisms as faster electron transfer mediated by biopolymer metal complexes enzymes and manganese oxidizing bacteria metabolism.In this work a biofilm was formed on different inorganic coated-steel samples from a bacteria consortium from marine sediment of Southern Gulf of Mexico obtained at 1500m depth. The setup consisted in a steady system without water renewal. The electrochemical corrosion activity was monitored measuring the OCP signal and electrochemical impedance. Besides current densities were registered when a constant cathodic potential was imposed. Surface analysis by confocal microscopy and scanning electronic microscopy were performed to correlate the corrosion behavior of this inorganic coatings in presence of marine biofilm.

Key words: zinc-rich primer epoxy coatings, CNT, marine bacteria biofilms, OCP, EIS

Electrochemical and corrosion characterization of different inorganic coated-steel under influence of marine biofilm formationM. Galicia1 V. Valencia1 M. Aguirre H. Castaneda2*1Departamento de Química Universidad Autónoma de Ciudad Juárez Instituto de Ciencias Biomédicas Juárez CH 32300 México.2Department of Materials Science and Engineering Dwight Look College of Engineering Texas A&M University College Station TX 77843-3003*Corresponding author.E-mail address: hcastaneda@tamu.eduAbstractNowadays it is generally accepted that in aerobic conditions marine electroactive biofilms induce faster oxygen reduction on active passive alloys immersed in seawater. Besides in natural seawater this alloys undergo a shift of open circuit potentials (OCP) towards noble direction after biofilm settlement OCP can be shifted up to ?350 mV vs. SCE. This latter is common for bare steel alloys while for inorganic coatings (with Zinc Aluminum and Magnesium contents) has not been explored in detail. For marine environments the active/passive characteristics relies on kinetic mechanisms as faster electron transfer mediated by biopolymer metal complexes enzymes and manganese oxidizing bacteria metabolism.In this work a biofilm was formed on different inorganic coated-steel samples from a bacteria consortium from marine sediment of Southern Gulf of Mexico obtained at 1500m depth. The setup consisted in a steady system without water renewal. The electrochemical corrosion activity was monitored measuring the OCP signal and electrochemical impedance. Besides current densities were registered when a constant cathodic potential was imposed. Surface analysis by confocal microscopy and scanning electronic microscopy were performed to correlate the corrosion behavior of this inorganic coatings in presence of marine biofilm.

Key words: zinc-rich primer epoxy coatings, CNT, marine bacteria biofilms, OCP, EIS

Also Purchased
Picture for Investigation of corrosion performance of zinc-rich epoxy primer modified by polyaniline on steel
Available for download

51316-7787-Investigation of corrosion performance of zinc-rich epoxy primer modified by polyaniline on steel

Product Number: 51316-7787-SG
ISBN: 7787 2016 CP
Author: Ximing Li
Publication Date: 2016
$20.00