ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The mechanism destroying the adhesion between PMMA and mild steel, and the action of water molecules reaching the adhesion interface was investigated. Mild steel and a thin PMMA film were bonded with dental adhesive (4-META resin). After immersion in water, the adhesive layer was peeled from the metal surface. The surface was analysed by ESCA, reflection electron diffraction, and X-ray diffraction to elucidate changes in surface structure. After 2 weeks immersion, there was a very thin brown product and after 2 months a thick black corrosion product composed of Fe3O4 formed at the adhesion interface. The thin brown layer showed no X-ray diffraction pattern but reflection electron diffraction showed it to be FeO(OH). After 3 days immersion, the mild steel surface appeared unchanged through the clear resin layer, and ESCA analysis showed the same chemical state as the surface of the specimen immersed for 2 weeks. Destruction of adhesion between metal and adhesive is caused by destruction of the chemical bond by the water molecules permeating through the resin layer. It is followed by corrosion of mild steel which produced iron oxide hydrate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00353176
Permalink
