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Title: Influence of Clay size on corrosion protection by Clay nanocomposite thin films

Abstract

In this work, the influence of clay platelet size on the corrosion barrier performance of highly-aligned polymer clay nanocomposite (PCN) thin films was examined. Layer-by-layer (LbL) deposition of alternating branched polyethylenimine (PEI) and either laponite (LAP), montromorillonite (MMT) or vermiculite (VMT) clay platelets were assembled on mild steel plates to obtain 20 bilayer (BL) films and cross-linked using glutaraldehyde after deposition. The clay platelets were chosen based on their aspect ratio, approximately 30:1, 400:1, and 2000:1, respectively. Electrochemical impedance spectroscopy of the coated steel plates during immersion showed corrosion rates and coating permeability followed LAP > MMT > VMT for up to 7 days of exposure in 0.6 M NaCl. The PEI/VMT films, ~250 nm thick, slowed corrosion by a factor of >1000 compared to bare steel. The results support the premise that high aspect ratio clay platelets can improve the corrosion barrier efficacy of LbL PCN films by decreasing film permeability and provide exceptional protection to steel in saline environments compared to other thin multilayer coatings and pretreatments.

Authors:
 [1];  [1];  [2];  [3];  [1];  [2];  [1]
  1. The Ohio State Univ., Columbus, OH (United States)
  2. Texas A & M Univ., College Station, TX (United States)
  3. Lehigh Univ., Bethlehem, PA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1595018
Alternate Identifier(s):
OSTI ID: 1698107
Report Number(s):
SAND-2019-15104J
Journal ID: ISSN 0300-9440; 682194
Grant/Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Accepted Manuscript
Journal Name:
Progress in Organic Coatings
Additional Journal Information:
Journal Volume: 140; Journal Issue: C; Journal ID: ISSN 0300-9440
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Coating; Anti-corrosion; Electrochemical impedance; Polymer; Layer-by-layer assembly; Permeability

Citation Formats

Melia, Michael A., Percival, Stephen J., Qin, Shuang, Barrick, Erin, Spoerke, Erik, Grunlan, Jaime, and Schindelholz, Eric J.. Influence of Clay size on corrosion protection by Clay nanocomposite thin films. United States: N. p., 2019. Web. https://doi.org/10.1016/j.porgcoat.2019.105489.
Melia, Michael A., Percival, Stephen J., Qin, Shuang, Barrick, Erin, Spoerke, Erik, Grunlan, Jaime, & Schindelholz, Eric J.. Influence of Clay size on corrosion protection by Clay nanocomposite thin films. United States. https://doi.org/10.1016/j.porgcoat.2019.105489
Melia, Michael A., Percival, Stephen J., Qin, Shuang, Barrick, Erin, Spoerke, Erik, Grunlan, Jaime, and Schindelholz, Eric J.. Fri . "Influence of Clay size on corrosion protection by Clay nanocomposite thin films". United States. https://doi.org/10.1016/j.porgcoat.2019.105489. https://www.osti.gov/servlets/purl/1595018.
@article{osti_1595018,
title = {Influence of Clay size on corrosion protection by Clay nanocomposite thin films},
author = {Melia, Michael A. and Percival, Stephen J. and Qin, Shuang and Barrick, Erin and Spoerke, Erik and Grunlan, Jaime and Schindelholz, Eric J.},
abstractNote = {In this work, the influence of clay platelet size on the corrosion barrier performance of highly-aligned polymer clay nanocomposite (PCN) thin films was examined. Layer-by-layer (LbL) deposition of alternating branched polyethylenimine (PEI) and either laponite (LAP), montromorillonite (MMT) or vermiculite (VMT) clay platelets were assembled on mild steel plates to obtain 20 bilayer (BL) films and cross-linked using glutaraldehyde after deposition. The clay platelets were chosen based on their aspect ratio, approximately 30:1, 400:1, and 2000:1, respectively. Electrochemical impedance spectroscopy of the coated steel plates during immersion showed corrosion rates and coating permeability followed LAP > MMT > VMT for up to 7 days of exposure in 0.6 M NaCl. The PEI/VMT films, ~250 nm thick, slowed corrosion by a factor of >1000 compared to bare steel. The results support the premise that high aspect ratio clay platelets can improve the corrosion barrier efficacy of LbL PCN films by decreasing film permeability and provide exceptional protection to steel in saline environments compared to other thin multilayer coatings and pretreatments.},
doi = {10.1016/j.porgcoat.2019.105489},
journal = {Progress in Organic Coatings},
number = C,
volume = 140,
place = {United States},
year = {2019},
month = {12}
}

Journal Article:

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Cited by: 1 work
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