Adhesion and durability of metal-polymer bonds

The effects of surface pretreatment on the cyclic-fatigue characteristics of bonded aluminium-alloy joints

“…This indicates that the phenomenon is not merely a result of the hydration of a pre-existing oxide layer, occurring post-failure of the joint. Thus, the available evidence suggests that failure occurred within a predominantly hydroxide layer, which is known to be weaker than the initial oxide [20,21]. Therefore, oxide weakening arising from hydration of the oxide in-situ by the ingressing moisture appears to have initiated joint failure, as has previously [11] been demonstrated to occur via transmission electron microscopy studies.…”

“…Figure 8 shows a positive ToF-SIMS spectrum in the mass range of m/z = 400 to 1000 Da. for the 'adhesive' side of the fracture surface taken from the apparently interfacial failure region, near the fatigue 20 threshold, for the GBD-and GPS-pretreated joints. Characteristic clusters of peaks associated with the various forms of aluminium oxide and hydroxide were detected at high masses on both fracture surfaces of the GPS-pretreated joints and in both positive and negative ToF-SIMS.…”

The influence of substrate chemistry on the adhesion of electrolessly deposited Ni(P) on metal oxide coated ceramics

“…The Ni(P) films generally follow the surface topography of the substrate on this scale [1,4,5]. This type of roughness was termed microroughness by Venables [17], who observed an improvement of adhesion of polymer layers to phosphoric acid anodized aluminium due to roughness structures of 5-10 nm.…”

Interfacial phenomena in metallic z-reinforced CFRP joints after hygrothermal ageing

“…Alternative physical techniques like laser or plasma pretreatment are developed, incentivated by major drawbacks such as environmental issues and unique bath setups for different metals and alloys [14,17]. Laser irradiation was proven to modify a titanium surface on a nano-range, resulting in an improved joint strength due to an increased surface area [17][18][19][20][21][22][23]. Chemical activation and contamination removal by the energy input into the substrate material were studied in [24].…”