English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Pretreatment with a β-Cyclodextrin-Corrosion Inhibitor Complex Stops an Initiated Corrosion Process on Zinc

Altin, A., Vimalanandan, A., Sarfraz, A., Rohwerder, M., & Erbe, A. (2019). Pretreatment with a β-Cyclodextrin-Corrosion Inhibitor Complex Stops an Initiated Corrosion Process on Zinc. Langmuir, 35(1), 70-77. doi:10.1021/acs.langmuir.8b03441.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0002-BE82-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-BE83-4
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Altin, Abdulrahman1, Author              
Vimalanandan, Ashokanand2, Author              
Sarfraz, Adnan1, Author              
Rohwerder, Michael2, Author              
Erbe, Andreas1, 3, Author              
Affiliations:
1Interface Spectroscopy, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863358              
2Corrosion, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2074315              
3Department of Materials Science and Engineering, NTNU - Norwegian University of Science and Technology, 7491 Trondheim, Norway, ou_persistent22              

Content

show
hide
Free keywords: Corrosion protection; Cyclodextrins; Defects; Passivation; Plastic coatings; X ray photoelectron spectroscopy; Zinc, 2-mercaptobenzothiazole; Artificial defects; Corrosion protection system; Cyclic oligosaccharides; Electrode potentials; Metal pre treatments; Organic corrosion inhibitors; Scanning Kelvin probes, Corrosion inhibitors
 Abstract: Metal pretreatment is typically the first step in a reliable corrosion protection system. This work explores the incorporation of complexes between the cyclic oligosaccharide β-cyclodextrin (β-CD) and the molecular organic corrosion inhibitor 2-mercaptobenzothiazole (MBT) into an oxide-based pretreatment layer on metallic zinc. The layers were produced by a precorrosion step in the presence of β-CD. The resulting films have a morphology dominated by spherical particles. X-ray photoelectron spectroscopy investigations of the surfaces show the sulfur atoms of MBT to be partially oxidized but mostly intact. Samples pretreated with such a layer were subsequently coated with a model polymer coating, and the delamination of this model coating from an artificial defect was monitored by a scanning Kelvin probe (SKP). The SKP results show a slow down of delamination after several hours of the ongoing corrosion process for surfaces pretreated with the complexes. Finally, an increase in the electrode potential in the defect was observed, with a subsequent complete stop in delamination and repassivation of the defect after ≈10 h. This repassivation is attributed to the release of MBT after the initiation of the corrosion process. Most likely, the increase of pH, combined with the availability of aqueous solution, facilitates the MBT release after the initiation of a corrosion process. Consequently, complexes formed from β-CD and corrosion inhibitors can be effectively incorporated into inorganic pretreatments, and the inhibitor component can be released upon start of the corrosion process. © 2018 American Chemical Society.

Details

show
hide
Language(s): eng - English
 Dates: 2018-12-072019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1021/acs.langmuir.8b03441
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Langmuir
  Abbreviation : Langmuir
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Columbus, OH : American Chemical Society
Pages: - Volume / Issue: 35 (1) Sequence Number: - Start / End Page: 70 - 77 Identifier: ISSN: 0743-7463
CoNE: https://pure.mpg.de/cone/journals/resource/954925541194