Plasma Processing of Aluminum Alloys to Promote Adhesion: A Critical Review

Patel, Vinay Kumar; Bhowmik, Shantanu

doi:10.1002/9781119526445.ch3

Cited by 6 publications

(4 citation statements)

References 60 publications

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“…Furthermore, PEO treatment is quite commonly employed in order to create a good keying surface for further surface treatment, such as painting. This is particularly the case for aluminium alloys and a recent review covers the issues in this area [80].…”

Section: Porositymentioning

confidence: 99%

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Clyne

Troughton

2018

International Materials Reviews

414

225

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The review describes recent progress on understanding and quantification of the various phenomena that take place during plasma electrolytic oxidation, which is in increasing industrial use for production of protective coatings and other surface treatment purposes. A general overview of the process and some information about usage of these coatings are provided in the first part of the review. The focus is then on the dielectric breakdown that repeatedly occurs over the surface of the work-piece. These discharges are central to the process, since it is largely via the associated plasmas that oxidation of the substrate takes place and the coating is created. The details are complex, since the discharge characteristics are affected by a number of processing variables. The interrelationships between electrical conditions, electrolyte composition, coating microstructure and rates of growth, which are linked via the characteristics of the discharges, have become clearer over recent years and these improvements in understanding are summarised here. There is considerable scope for more effective process control, with specific objectives in terms of coating performance and energy efficiency, and an attempt is made to identify key points that are likely to assist this.

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Section: Porositymentioning

confidence: 99%

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Clyne

Troughton

2018

International Materials Reviews

414

225

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“…There have been studies to modify the lubricant composition to improve lubricant spreading on the surface, , with some successful results in reducing friction and wear. The surface energy of a metal substrate, on the other hand, can be modified by physical or chemical surface treatments including, for instance, plasma treatment, which lacks industrial scalability; etching procedures using inorganic acids, which can be used for short-term wettability improvement; and treatment with surfactants bearing appropriate chemical functionalities for surface binding. − Moreover, improved bonding performance and durability in the joining step, as well as corrosion inhibition, are typically achieved by employing Ti/Zr-based or silica-based pre-treatments. − …”

Section: Introductionmentioning

confidence: 99%

Multifunctional Aluminum Pre-treatments from End-Functionalized Phosphonic Acid Self-Assembled Monolayers

Yeo,

Bleich,

Guérin

et al. 2024

Langmuir

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Aluminum alloys are used in advanced engineering applications as they possess a combination of favorable properties, including high strength, lightweightness, good corrosion resistance, machineability, and recyclability. Such applications often require forming the sheets into the final components, which is typically aided by an oil-based lubricant, followed by joining them using adhesives, which is hampered by residual lubricant. In this work, aluminum surfaces were modified with different self-assembled monolayers (SAMs), with the goal of significantly reducing the amount of lubricant while simultaneously improving friction properties, forming, and bonding performance. Our results show that SAMs terminated with hydrophilic and nucleophilic end groups give rise to high-energy surfaces with wetting properties that are stable over time. These surfaces showed significantly improved surface wetting by the lubricant, which in turn resulted in an improved forming performance at reduced lubricant coat weights. Moreover, the nucleophilic SAM termination provided outstanding performance in adhesive bonding tests under corrosive conditions.

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“…Pre-cleaning is a vital issue considering the contaminations transferred from the bath to the bath, unsuitable bath impurities, and lubricant residues carried to the surface from machining during the electrolytic coating application process. Under unsuitable conditions, it causes heterogeneity in coating thickness, blistering, delamination, insufficient corrosion life, unsuitable paint and adhesion problems [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effects of Plasma Treatment as a Surface Preparation Step on Copper Plating

Altuncu¹,

Yıldız²,

Koyuncu³

2021

acperpro

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The continuous electrolytic copper plating process traditionally includes degreasing and acid baths before copper plating baths. These baths add difficult-to-control parameters to the process. Besides they contain various alkaline chemicals and acids that are harmful to the environment. The plasma surface treatment is a controllable alternative surface cleaning method which is used in various fields. Also it can be used for surface activation to improve plating performance. Another important aspect of the plasma process is its environmental friendliness. It has a high potential to make plating preparation stages environmentally friendly and efficient. In this study a plasma surface treatment system is attached on a traditional copper plating line which is used for cold rolled low carbon steel sheets. It was determined that plasma surface treatment had a positive effect on the quality of copper plating.

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Plasma Processing of Aluminum Alloys to Promote Adhesion: A Critical Review

Cited by 6 publications

References 60 publications

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

A review of recent work on discharge characteristics during plasma electrolytic oxidation of various metals

Multifunctional Aluminum Pre-treatments from End-Functionalized Phosphonic Acid Self-Assembled Monolayers

Effects of Plasma Treatment as a Surface Preparation Step on Copper Plating

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