Uniform nucleation of zincate layer through the optimized etching process to prevent failure in electroless plating on 2024 aluminum alloy

Sharifalhoseini, Zahra; Davoodi, Ali

doi:10.1016/j.engfailanal.2021.105326

Cited by 10 publications

(3 citation statements)

References 44 publications

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“…In similar fashion, Sharifalhoseini and Davoodi have recently demonstrated effective Zn deposition onto Al alloys for subsequent EL NiP plating. A preliminary etch of the Al using HF:HNO 3 creates nonuniform etch pits, which adversely affect Zn and EL Ni deposition.…”

Section: Elementsmentioning

confidence: 82%

Electroless Metallization of the Elements: Survey and Progress

Turró

Dressick

2022

ACS Appl. Electron. Mater.

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The electroless plating of metals and their alloys, oxides, and chalcogenides represents a critically important technology for the automotive, aerospace, machine tools, and, especially, the electronics industries. Since the initial efforts involving the plating of industrially important metals, such as Ni, Co, Cu, Ag, and Au, in the mid-20th century, the process has evolved to encompass a growing number of elements. At the same time, this expansion in the palette of accessible metals has enabled progress in these industries and evoked new nonconventional applications. In this review, we collect and survey available electroless processes in aqueous and organic solvent systems for each element organized according to position in the Periodic Table as a resource for the reader. Examples illustrating progress in the field are presented and are described in sufficient detail to be useful and understandable for both the expert and nonexpert. Given the historical importance of electronics as a driver for development of electroless processes, examples are electronics-related where possible. However, we strive to also include examples of applications in nontraditional fields to provide the reader with a sense of generality available for electroless methods. The review closes with an outlook for the field and a challenge to scientists and engineers to adapt electroless processes for new applications to continue the growth of the field.

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Section: Elementsmentioning

confidence: 82%

Electroless Metallization of the Elements: Survey and Progress

Turró

Dressick

2022

ACS Appl. Electron. Mater.

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“…Magnetic stirrers ensured good mixing during all the passages carried out. Thanks to the pre-treatment, a thin layer of zinc was deposited onto the aluminium surface [40][41][42]. Nevertheless, to ensure better adhesion between layers, a double zincate step was preferred despite the fact that the literature is still controversial with regards to this point [41,[43][44][45][46].…”

Section: Zinc Platingmentioning

confidence: 99%

Electroplating on Al6082 Aluminium: A New Green and Sustainable Approach

Comparini

Pace²,

Giurlani

et al. 2022

Coatings

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Aluminium and its alloys are interesting for many applications because they are very light, cheap, and unlimitedly recyclable. Despite being a promising base material for the fashion-jewellery sector, their tendency to form a passivating film makes them difficult to be galvanized, even more when recycled aluminium contains impurities of refractory elements. Indeed, the most common processes for galvanising aluminium are often expensive and not environmentally sustainable because they involve the use of cyanides. In this work we focussed on the pre-treatments and electroplating on Al6082 aluminium which is largely used for fashion-jewellery applications. The objective of the present study was to assess whether Al6082 series aluminium is suitable a as base material for the fashion market; therefore, we investigated the effectiveness of plating pre-treatments and the success of electroless zinc deposition using an innovative alkaline cyanide-free zincate solution. After the electroplating, adhesion between the deposited layers was evaluated both with cross-sectional scanning electron microscope (SEM) analysis as well as with an adhesion evaluation test (ISO2819:2018): no detachments confirmed the positive test outcomes and thereby highlighted that Al6082 can be exploited as base material in the fashion-jewellery market.

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“…Various surface treatment techniques have been developed and implemented to improve the corrosion resistance of alloys. Specifically, surface treatment techniques, such as anodic oxidation [16][17][18][19], electroplating [20,21], conversion treatment [22], and sol gel method [23,24] have been industrially used for different kinds of Al alloys. However, in these surface treatment processes, the waste liquid generated needs to be treated before disposal, and there is a risk of environmental pollution caused by heavy metals [25].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ammonia Addition on the Growth of an AlO(OH) Film during Steam Coating Process

2022

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Al alloys possess excellent physical and mechanical properties, such as low density, high specific strength, and good ductility. However, their low corrosion resistance limits their use in corrosive environments. The steam coating process has attracted considerable attention as a new coating technology that can improve the corrosion resistance of Al alloys. This surface treatment technology uses steam to form a corrosion-resistant film on Al alloys. However, a decrease in the processing time, which can result in a lower cost, is needed for the practical application of the steam coating process. In this study, an Al-Mg-Si alloy is used as the base material, and ammonia is added to the steam source to increase the film formation rate. By adding ammonia (0.5 mol/L) to the steam source, the rate constant, K, for film formation increases 1.82 times compared to that of the pure-water-only treatment. Field emission scanning electron micrographs of the film surface confirms that the crystal morphologies of the crystals change from rectangular to parallelepiped shape with increasing process time by ammonia addition. Furthermore, X-ray diffraction patterns show that AlO(OH) crystals are successfully synthesized without byproducts, even when ammonia is added.

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Uniform nucleation of zincate layer through the optimized etching process to prevent failure in electroless plating on 2024 aluminum alloy

Cited by 10 publications

References 44 publications

Electroless Metallization of the Elements: Survey and Progress

Electroless Metallization of the Elements: Survey and Progress

Electroplating on Al6082 Aluminium: A New Green and Sustainable Approach

Effect of Ammonia Addition on the Growth of an AlO(OH) Film during Steam Coating Process

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