Adhesively bonded systems subjected to substitute ocean water
| dc.contributor.author | Aartun, Lars | en |
| dc.contributor.department | Chemistry | en |
| dc.date.accessioned | 2024-03-12T20:23:34Z | en |
| dc.date.available | 2024-03-12T20:23:34Z | en |
| dc.date.issued | 1995 | en |
| dc.description.abstract | Along with the combined use of steel and polymeric materials in offshore oil production applications, there is a joining problem. This work focused on the behavior of adhesively bonded systems subjected to substitute ocean water (SOW). The systems were combinations of two types of stainless steel; 310S and 316, two types of polymeric composites; carbon-fiber reinforced bismaleimide (CBMI) and Kevlar-fiber reinforced epoxy (KE), and two types of adhesives; acrylic and epoxy. The performance of each adhesively bonded system subjected to air (static), to SOW (static), and to air and SOW (cyclic), was monitored during exposure for both 720 and 1440 hours by measurements of the length of a crack induced upon insertion of a wedge. The failure modes were evaluated by visual inspection, electron spectroscopy for chemical analysis and scanning electron microscopy. Steel/CBMI and steel/KE systems bonded with the acrylic and the epoxy adhesive, and stainless steel/stainless steel systems bonded with the acrylic adhesive, experienced sudden and rapid crack extension when subjected to SOW (both static and cyclic exposure). The sudden and rapid crack extension was correlated with a change from the individual initial failure modes, (i) mixed adhesive/cohesive at the composite side in the case of steel/CBMI systems (regardless of the adhesives), (ii) delamination in the upper layer of the composite in the case of stainless steel/KE systems (regardless of the adhesives), and (iii) cohesive in the acrylic adhesive in the case of steel/steel systems, to adhesive at the steel side in all the steel containing systems. The change in failure modes and crack extension in SOW were more extensive for steel/composite systems bonded with the epoxy adhesive than for corresponding systems bonded with the acrylic adhesive. Composite/composite systems experienced no environmental effect on either crack extension or failure modes, regardless of the adhesives. | en |
| dc.description.degree | M.S. | en |
| dc.format.extent | xiii, 195 leaves | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.uri | https://hdl.handle.net/10919/118378 | en |
| dc.language.iso | en | en |
| dc.publisher | Virginia Polytechnic Institute and State University | en |
| dc.relation.isformatof | OCLC# 34299067 | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject.lcc | LD5655.V855 1995.A225 | en |
| dc.title | Adhesively bonded systems subjected to substitute ocean water | en |
| dc.type | Thesis | en |
| dc.type.dcmitype | Text | en |
| thesis.degree.discipline | Chemistry | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | masters | en |
| thesis.degree.name | M.S. | en |
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