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Mechanism of delamination of a polyamide coating modified with an aminosilane
Author(s) -
Guichenuy Marianne,
Watts John F.,
Abel MarieLaure,
Audenaert Marc
Publication year - 2006
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2213
Subject(s) - polyamide , silane , coating , materials science , silicon , oxide , composite material , silicon oxide , delamination (geology) , covalent bond , adhesion , chemistry , metallurgy , organic chemistry , silicon nitride , paleontology , subduction , tectonics , biology
Previous articles have reported the progress made in enhancing the durability of a polyamide powder coating through the incorporation of an aminosilane. This work has been extended, and this paper is concerned mainly with the use of high mass resolution ToF‐SIMS to refine the understanding of the role of the aminosilane in enhancing adhesion. After delamination of the coatings in a salt‐spray cabinet, the presence of silane is easily detected on both sides of the failed interface. The silane has cross‐linked; fragments attributed to this polymerisation are observed on the delaminated coatings and the exposed steel. At nominal mass 100, a peak assigned to FeOSi + fragment is readily observed and can be attributed to the formation of a covalent bond between iron and silane and the presence of an iron silicon oxide. The silicon Auger parameter obtained on the steel surface is consistent with this hypothesis. Copyright © 2006 John Wiley & Sons, Ltd.