Etching characteristics of high-purity aluminum in hydrochloric acid solutions

Oh, Han-Jun; Lee, Jong-Ho; Ahn, Hong-Joo; Jeong, Yongsoo; Park, No-Jin; Kim, Seong-Su; Chi, Choong-Soo

doi:10.1016/j.msea.2006.01.159

Cited by 28 publications

(17 citation statements)

References 9 publications

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“…This result was expected: the acetone degreasing does not increase the adherence but only prevent the formation in the joint of weak boundary layers. The HCl chemical etching lead to the formation of a new passivation layer [20], increasing the mechanical anchoring. Finally, the silane leads to the formation of chemical bonds [21,22].…”

Section: Failure Loads Resultsmentioning

confidence: 99%

“…Acetone, hydrochloric acid and aminopropyltriethoxysilane were used to pre-treat the substrates. Acid attack can be used to create a new layer of oxide on the aluminum substrate surface [20], whereas silane grafting can be used to create covalent interfacial links to promote the adhesion [21,22].…”

Section: Markmentioning

confidence: 99%

“…These treatments were selected based on their quality: acetone degreasing was applied to clean the surface, removing a part of the surface organic pollution, whereas the stripping with hydrochloric acid attacked the oxide surface, creating a new passivation layer [20] and eliminating surface pollution. Finally, silane treatments, which are known for their adhesion promoting qualities, were used to establish genuine covalent bridging between the substrate surface, constituting a hydroxyl group, and the polyepoxides [21,22].…”

Section: Samples and Preparationmentioning

confidence: 99%

See 2 more Smart Citations

Using the 3-point bending method to study failure initiation in epoxide-aluminum joints

Sauvage

Aufray

Jeandrau

et al. 2017

International Journal of Adhesion and Adhesives

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 17849 A B S T R A C TThe increasing use of adhesives in industry has boosted the search for tests which allow the adherence level to be defined. These tests, depending on the type of load, examine different stresses, failure modes and mixed modes. Furthermore, these tests can be focused either on initiation or propagation of adhesive failure. The subject of this study is the initiation of adhesive failure. The initiation of failure can be determined with the 3-point bending test. Trials of 3-point bending tests were conducted on an aluminum 2024 substrate, with two different thicknesses, in order to understand the impact of the adherend thickness. The aluminum substrate received different types of surface pre-treatment: acetone cleaning, hydrochloric acid etching or aminopropyltriethoxysilane coating. Two adhesives were used: the first one was a mixture of epoxy pre-polymer DGEBA and DETA amine, whereas the second was a commercially formulated adhesive, ELECOLIT 6604. The initiation of adhesive failure was obtained by 3-point bending test and verified with SEM analysis. The failure loads measured enabled the effect of surface treatment on adhesive failure to be revealed: the results indicate that the surface treatment with silane is the most efficient in comparison to hydrochloric acid etching and of course to the simple acetone degreasing. It was assumed that the scatter of the results obtained for each series is due to the variation of the "intrinsic" adherence between the adhesive and the substrate. Furthermore, it was noted that the failure loads for different substrate thicknesses cannot be compared due to the effect of the thickness: it was therefore not possible to simply compare results obtained for different thicknesses of the same substrate for a given substrateadhesive system. The energy approach proposed in this study makes it possible. The energy requested to initiate the adhesive failure for a given system can then be known, whatever the initial geometry of the 3-point bending test is. However, it was also shown that the thickness of the substrate must be correctly chosen. A thick substrate increases the dispersion and a thin substrate may induce local unwelcome plastic strain. In conclusion, this study allows to define an energy criteria for adhesives failure initiation.

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Section: Failure Loads Resultsmentioning

confidence: 99%

Section: Markmentioning

confidence: 99%

Section: Samples and Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Using the 3-point bending method to study failure initiation in epoxide-aluminum joints

Sauvage

Aufray

Jeandrau

et al. 2017

International Journal of Adhesion and Adhesives

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“…The composition of etchants for aluminum-alloy etching has been intensively studied [3,13,14,15,16,17,18,19,20,21]. The following chemicals are among those used: a hot sodium hydroxide solution with subsequent nitric acid application [3], phosphoric acid [13], acids with the addition of surfactants [19], salts [20], ferrous ions [14], mixtures of phosphoric and nitric acid with copper or ammonia ions [15], a mixture of hydrochloric acid with sulfuric acid or ethylene glycol [16], and hydrochloric acid alone [12,21].…”

Section: Introductionmentioning

confidence: 99%

“…The etching rate can be controlled by temperature [3], and current density in the case of electrochemical etching [16,22,23]. …”

Section: Introductionmentioning

confidence: 99%

Preparation of Textured Surfaces on Aluminum-Alloy Substrates

et al. 2018

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The ways of producing porous-like textured surfaces with chemical etching on aluminum-alloy substrates were studied. The most appropriate etchants, their combination, temperature, and etching time period were explored. The influence of a specifically textured surface on adhesive joints’ strength or superhydrophobic properties was evaluated. The samples were examined with scanning electron microscopy, profilometry, atomic force microscopy, goniometry, and tensile testing. It was found that, with the multistep etching process, the substrate can be effectively modified and textured to the same morphology, regardless of the initial surface roughness. By selecting proper etchants and their sequence one can prepare new types of highly adhesive or even superhydrophobic surfaces.

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Aerophilic Surfaces for Sustained Corrosion Protection of Metals Underwater

Prado,

Hayek,

Mazare

et al. 2024

Adv Funct Materials

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Corrosion and biofouling are wetting‐related phenomena that limit the effective use of metals in aqueous media. Nonwettable surfaces can mitigate the adverse effects of wetting by minimizing contact with water. However, current achievements in this field fall short of meeting industrial requirements due to the short lifetime of plastrons. This study proposes a method to measure the protective sustainability of plastron. Superhydrophobic (SHS) and aerophilic (APhS) surfaces are constructed on lightweight aluminum and are initially analyzed by conventional goniometry, which show comparable values. However, the plastron that develops underwater is substantially different. While SHS exhibit unevenly broken plastron, APhS show uniform, continuous plastron. As an example of the sustained protective performance of plastron, the corrosion resistance of SHS and APhS is presented. Potentiodynamic polarization, impedance spectroscopy, and long‐term immersion in seawater show a drastic enhancement in corrosion resistance, exclusively for APhS. In fact, almost no electrochemical signals are measurable, and no pitting corrosion is observed after 415 days of immersion in seawater. Conversely, SHS show no noticeable improvement and corrode faster than bare Al due to plastron loss. Since goniometric measurements do not provide information on plastron, it is essential to analyze the plastron for any non‐wettable surface utilized underwater.

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Etching characteristics of high-purity aluminum in hydrochloric acid solutions

Cited by 28 publications

References 9 publications

Using the 3-point bending method to study failure initiation in epoxide-aluminum joints

Using the 3-point bending method to study failure initiation in epoxide-aluminum joints

Preparation of Textured Surfaces on Aluminum-Alloy Substrates

Aerophilic Surfaces for Sustained Corrosion Protection of Metals Underwater

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