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Title: Nanoscale thin film corrosion barriers enabled by multilayer polymer clay nanocomposites

Abstract

In this paper, we describe the immersion corrosion resistance of multilayer polymer-clay nanocomposite (PCN) barrier thin films coated on low carbon steel. Deposited using a Layer-by-Layer (LbL) self-assembly process and only a few hundred nanometers thick, the thin film polymer clay nanocomposites (PCN) exhibited excellent corrosion barrier properties, comparable to coatings that are orders of magnitude thicker. PCN barrier thin films comprising up to 60 “bilayers” of polyethyleneimine and exfoliated montmorillonite were coated onto steel coupons and immersed in high salinity water for up to 7 days to evaluate barrier film corrosion resistance. PCN film performance is shown to be influenced by the number of coated bilayers and, critically, a post-coating crosslinking treatment. Covalently crosslinking the polyethyleneimine components of the films resulted in a significant improvement in corrosion resistance. PCN films that were not crosslinked showed nearly identical electrochemical impedance compared to bare steel, failing rapidly and leading to large areas of visible corrosion. Impedance behavior of the corroding samples was analyzed with a precise model, which allowed the determination of the PCN film properties separate from the substrate and solution. The resistivity through the PCN thin films was very high, even after 7 days of immersion. Though increasing PCNmore » thickness led to increased charge transfer resistance, chemical crosslinking most significantly increased charge transfer resistance by several orders of magnitude. The combined influences of PCN film resistivity and very high charge transfer resistances led to the outstanding corrosion barrier properties. These PCN films show promise toward a new class of low-cost highly applicable anticorrosion coatings.« less

Authors:
 [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1670771
Alternate Identifier(s):
OSTI ID: 1702635
Report Number(s):
SAND-2020-10520J
Journal ID: ISSN 0257-8972; 691055
Grant/Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Surface and Coatings Technology
Additional Journal Information:
Journal Volume: 383; Journal ID: ISSN 0257-8972
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Layer-by-layer; Anticorrosion; Coatings; Immersion; Steel

Citation Formats

Percival, Stephen J., Melia, Michael Anthony, Alexander, Christopher L., Nelson, Derek W., Schindelholz, Eric J., and Spoerke, Erik David. Nanoscale thin film corrosion barriers enabled by multilayer polymer clay nanocomposites. United States: N. p., 2019. Web. doi:10.1016/j.surfcoat.2019.125228.
Percival, Stephen J., Melia, Michael Anthony, Alexander, Christopher L., Nelson, Derek W., Schindelholz, Eric J., & Spoerke, Erik David. Nanoscale thin film corrosion barriers enabled by multilayer polymer clay nanocomposites. United States. https://doi.org/10.1016/j.surfcoat.2019.125228
Percival, Stephen J., Melia, Michael Anthony, Alexander, Christopher L., Nelson, Derek W., Schindelholz, Eric J., and Spoerke, Erik David. Thu . "Nanoscale thin film corrosion barriers enabled by multilayer polymer clay nanocomposites". United States. https://doi.org/10.1016/j.surfcoat.2019.125228. https://www.osti.gov/servlets/purl/1670771.
@article{osti_1670771,
title = {Nanoscale thin film corrosion barriers enabled by multilayer polymer clay nanocomposites},
author = {Percival, Stephen J. and Melia, Michael Anthony and Alexander, Christopher L. and Nelson, Derek W. and Schindelholz, Eric J. and Spoerke, Erik David},
abstractNote = {In this paper, we describe the immersion corrosion resistance of multilayer polymer-clay nanocomposite (PCN) barrier thin films coated on low carbon steel. Deposited using a Layer-by-Layer (LbL) self-assembly process and only a few hundred nanometers thick, the thin film polymer clay nanocomposites (PCN) exhibited excellent corrosion barrier properties, comparable to coatings that are orders of magnitude thicker. PCN barrier thin films comprising up to 60 “bilayers” of polyethyleneimine and exfoliated montmorillonite were coated onto steel coupons and immersed in high salinity water for up to 7 days to evaluate barrier film corrosion resistance. PCN film performance is shown to be influenced by the number of coated bilayers and, critically, a post-coating crosslinking treatment. Covalently crosslinking the polyethyleneimine components of the films resulted in a significant improvement in corrosion resistance. PCN films that were not crosslinked showed nearly identical electrochemical impedance compared to bare steel, failing rapidly and leading to large areas of visible corrosion. Impedance behavior of the corroding samples was analyzed with a precise model, which allowed the determination of the PCN film properties separate from the substrate and solution. The resistivity through the PCN thin films was very high, even after 7 days of immersion. Though increasing PCN thickness led to increased charge transfer resistance, chemical crosslinking most significantly increased charge transfer resistance by several orders of magnitude. The combined influences of PCN film resistivity and very high charge transfer resistances led to the outstanding corrosion barrier properties. These PCN films show promise toward a new class of low-cost highly applicable anticorrosion coatings.},
doi = {10.1016/j.surfcoat.2019.125228},
url = {https://www.osti.gov/biblio/1670771}, journal = {Surface and Coatings Technology},
issn = {0257-8972},
number = ,
volume = 383,
place = {United States},
year = {2019},
month = {12}
}

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