Modification of thermoplastic coatings for improved cathodic disbondment performance on a steel substrate : a study on failure mechanisms

Roy, D., Simon, G. P., Forsyth, M. and Mardel, J. 2002, Modification of thermoplastic coatings for improved cathodic disbondment performance on a steel substrate : a study on failure mechanisms, International journal of adhesion and adhesives, vol. 22, no. 5, pp. 395-403.

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Title Modification of thermoplastic coatings for improved cathodic disbondment performance on a steel substrate : a study on failure mechanisms
Author(s) Roy, D.
Simon, G. P.
Forsyth, M.
Mardel, J.
Journal name International journal of adhesion and adhesives
Volume number 22
Issue number 5
Start page 395
End page 403
Publisher Elsevier Science
Place of publication Amsterdam, The Netherlands
Publication date 2002
ISSN 0143-7496
1879-0127
Keyword(s) B. Polyolefins
B. Steel
C. X-ray photoelectron spectroscopy
cathodic disbondment
Summary The effect of blending two different materials with a medium density polyethylene for use as pipe coatings is presented. The influence of such blending on properties such as cathodic disbondment (CD) and wet adhesion on steel is investigated. The components blended include a functionalised polyethylene (PE) containing the polar functionality, maleic anhydride (MAH) and an amorphous elastomer, ethylene-propylene-diene terpolymer (EPDM). It was found that modification of PE with small amount (2.5–3 wt%) of either blended MAH-g-PE or EPDM resulted in a significant improvement in CD performance and wet adhesion strength. The mode of failure and disbondment mechanism was investigated using energy dispersive X-ray spectroscopy (EDXS) and X-ray photoelectron spectroscopy (XPS). The greater resistance of migration of sodium ions increases with the incorporation of the modifiers, and it is proposed that this results in an increase in CD performance.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2002, Elsevier Science Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030249

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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