English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Corrosive delamination and ion transport along stretch-formed thin conversion films on galvanized steel

Posner, R., Fink, N., Giza, G., & Grundmeier, G. (2014). Corrosive delamination and ion transport along stretch-formed thin conversion films on galvanized steel. Surface and Coatings Technology, 253, 227-233. doi:10.1016/j.surfcoat.2014.05.041.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-E1DD-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-C472-E
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Posner, Ralf1, Author              
Fink, Nicole1, Author              
Giza, Galina1, Author              
Grundmeier, Guido1, 2, Author              
Affiliations:
1Christian Doppler Laboratory for Metal/Polymer Interfaces, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863353              
2University of Paderborn, Department of Technical and Macromolecular Chemistry, Warburger Str. 100, 33098 Paderborn, Germany, ou_persistent22              

Content

show
hide
Free keywords: Accelerated testing; Cathodic delamination; Conversion chemistry; Reactive electrolyte spreading; Stretch-forming; Zinc galvanized steel
 Abstract: Microdefects on thin conversion film coated Zn hot-dip galvanized steel (HDG) sheets were generated by stretch-forming and verified by cyclic voltammetry, which revealed higher anodic and cathodic current density levels on the pre-damaged samples. The data were compared to the kinetics of electrochemically determined ion transport processes along strained conversion film covered substrate surfaces in humid air and along uniaxially stretched epoxy/conversion layer/zinc interfaces exposed to the same corrosive environment. Analysis with a Scanning Kelvin Probe indicated increased driving forces for ion transport, but verified accelerated kinetics of cathodic delamination only in some areas of the stretch-formed epoxy coated substrates. This finding reflected a rather insignificant macroscopic acceleration of corrosion processes for samples that were strained by up to 15%. Similarly, accelerated oxygen reduction driven electrolyte spreading on bare conversion film covered HDG surfaces was verifiable only on a pm scale during initial process stages. This confirmed that stretching-induced defect formation increased the electrochemical activity of the substrates, but neither effectively nor significantly promoted the kinetics of ion transport along the sample surfaces in the present case. As a result, stable epoxy/conversion layer/zinc interfaces were maintained. (C) 2014 Elsevier B.V. All rights reserved.

Details

show
hide
Language(s): eng - English
 Dates: 2014-08-25
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Surface and Coatings Technology
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Lausanne : Elsevier
Pages: - Volume / Issue: 253 Sequence Number: - Start / End Page: 227 - 233 Identifier: ISSN: 0257-8972
CoNE: https://pure.mpg.de/cone/journals/resource/954925496044