Durability of titanium adhesive bonds with surface pretreatments based on alkaline anodisation

Marín-Sánchez, M.; Conde, A.; García-Rubio, María L.; Lavía, A.; García, Ignacio

doi:10.1016/j.ijadhadh.2016.07.001

Cited by 11 publications

(3 citation statements)

References 44 publications

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“…However, this method often involves the use of environmentally hazardous acidic and alkaline solutions. Moreover, the ASTM standard guide prescribes only a degreasing process for steel, which results in inferior bonding durability when compared to anodized metal substrates, such as aluminum (Al) and titanium (Ti). , Consequently, the molecular modification of adhesives to enhance their aging performance with steel surfaces emerges as a more universally applicable and efficient strategy . Catechol analogues, capable of forming cation–π, − multiple hydrogen bonds, π–π bonds, covalent bonds, and coordination bonds , with the metallic or polymeric substrates, demonstrate robust adsorption on ship hulls, even in turbulent and dynamic environments .…”

Section: Introductionmentioning

confidence: 99%

Interfacial Study of Steel Joints Prepared with a Catechol-Modified Epoxy Adhesive with Enhanced Bonding Performance and Durability

Li,

Wu,

Zhang

et al. 2024

Langmuir

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Bonding is widely used in aircraft and vehicles due to its light weight and simple process, but its strength decreases sharply in hot and humid environments. Anodization treatment, used for enhancing aging performance, is environmentally harmful and unsuitable for steel. In this study, a catechol-modified epoxy adhesive (CMEA) was prepared on a hectogram scale. Comparative analysis with phenol-modified epoxy adhesive (PMEA) and pristine epoxy adhesive (EA) revealed that the underwater bonding of CMEA (13.0 MPa) on stainless steel (SS) significantly outperformed the two control groups. Moreover, after 32 days of hydrothermal aging at 50 °C, CMEA preserved 73.9% of its initial bonding strength, while PMEA and EA retained 59.8 and 11.4%, respectively. Furthermore, X-ray photoelectron spectroscopy (XPS) etching at different times to analyze the interface between adhesives and the SS substrate indicated a marked increase in the O−H/ O 2− value at the interface between CMEA and the SS substrate compared to the two control groups. The above results demonstrated that the catechol-modified adhesive enhanced the bonding and aging properties of the adhesive, possibly due to the formation of a higher density of hydroxyl groups at the interface between the adhesive and the SS substrate. These findings contribute to the understanding of the enhancement mechanism of catechol in improving the bonding and aging properties of adhesives and suggest a feasible direction for designing adhesives with high bonding strength and high durability.

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Section: Introductionmentioning

confidence: 99%

Interfacial Study of Steel Joints Prepared with a Catechol-Modified Epoxy Adhesive with Enhanced Bonding Performance and Durability

Li,

Wu,

Zhang

et al. 2024

Langmuir

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“…In fact, although not always cheaper than other treatments, plasma preparation is of course more automatable. In this regard, consider a comparison with chemical treatments typically used on Ti-6Al-4V, such as SHA or NaTESi processes [9,19,20]. These envisage a series of critical steps, which contemplate use of hazardous materials and, thus, highly qualified personnel.…”

Section: Introductionmentioning

confidence: 99%

Low-pressure plasma treatment of CFRP substrates for epoxy-adhesive bonding: an investigation of the effect of various process gases

Pizzorni

Lertora

Gambaro

et al. 2019

Int J Adv Manuf Technol

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This work reports a systematic and quantitative evaluation of the effects induced on the adhesive properties of Carbon Fiber Reinforced Polymer (CFRP) substrates by various vacuum cold-plasma treatments. In particular, surface activation of the CFRP substrates was performed using several combinations of exposure time, plasma power and processing gas (air, Ar, O2 and N2). By comparing these plasma-treatments with conventional techniques of abrasion and peel-ply, it was possible to substantially increase the performance of the adhesively bonded joints made by overlapping the CFRP substrates with a structural epoxy resin. On each differently treated surface, measurements of roughness and of wettability were performed, allowing to evaluate the increase in surface energy after the plasma treatment. XPS analyses allowed the identification of the chemical state of the substrates and showed an in-depth functionalization of the outer layer of the CFRP material. The experimental results show that an engineered plasma treatment of the CFRP substrates allows one to modify the surface morphology and both wetting and chemical activation properties of the treated surfaces, resulting in an increased mechanical shear strength of the joints.

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“…Su et al [10] concluded that the grit blasted titanium-carbon fibre reinforced PEKK interface outperforms the other interfaces. The most recent works from García et al suggest that the alkaline anodizing process (NaTESi) based in a bath of sodium hydroxide may be an attractive alternative to chromic acid anodizing (CAA) for surface pretreatment of titanium alloys for preparing hybrid adhesive bonds Ti6Al4V/Carbon Fiber Reinforced Composite (CFRC) [11]. However, these methods can only solve the problem of poor wettability, but cannot reduce the residual stress in welding interfacial.…”

Section: Introductionmentioning

confidence: 99%

Design of reinforced interfacial structure in hybrid resistance-welded joints of GF/PEI composite and Ti6Al4V alloy by pre-etching surface treatment combined with in-situ growth of CNTs

et al. 2019

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Resistance-welding glass fabric reinforced polyetherimide (GF/PEI) laminate and Ti6Al4V alloy is often associated with the problem of poor wettability of the PEI on the Ti6Al4V alloy and high residual stress at the bonding interface layer, inducing low joining strength. To overcome these problems, Ti6Al4V alloy modified with surface etching pits and in situ synthesized carbon nanotubes (CNTs) were jointed to GF/PEI laminate by Joule-heat melting PEI resin. Results show that etching pits and CNTs can improve the wettability of PEI resin on Ti6Al4V alloy with the help of the capillary action, and the residual stress can be reduced by low coefficient of thermal expansion (CET) of CNTs. The shear strength of GF/PEI-Ti6Al4V joints with etching pits and CNTs modified is 25.76 MPa, which is 3.7 times higher than that of the joints without etching pits and CNTs modified.

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Durability of titanium adhesive bonds with surface pretreatments based on alkaline anodisation

Cited by 11 publications

References 44 publications

Interfacial Study of Steel Joints Prepared with a Catechol-Modified Epoxy Adhesive with Enhanced Bonding Performance and Durability

Interfacial Study of Steel Joints Prepared with a Catechol-Modified Epoxy Adhesive with Enhanced Bonding Performance and Durability

Low-pressure plasma treatment of CFRP substrates for epoxy-adhesive bonding: an investigation of the effect of various process gases

Design of reinforced interfacial structure in hybrid resistance-welded joints of GF/PEI composite and Ti6Al4V alloy by pre-etching surface treatment combined with in-situ growth of CNTs

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