Plasma electrolytic oxidation of zircaloy-4 in a mixed alkaline electrolyte

Afghani, Fajar Al; Anawati, Anawati

doi:10.1016/j.surfcoat.2021.127786

Cited by 11 publications

(1 citation statement)

References 42 publications

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“…Consequently, the high porosity and the presence of defects will induce the development of more brittle layers, limiting their long-term barrier efficacy. In particular, the incorporation of specific chemical elements, such as certain salts or nanoparticles, into PEO coatings is of great interest to reduce the intrinsic porosity of these layers, thereby providing coatings with a broader range of properties [147,148]. Each additive, depending on the concentration used and how it is combined with the other additives, will provide unique properties to the developed PEO coating, such as higher growth rate, higher thickness and hardness, lower roughness, or enhanced tribological and anti-corrosion performance [86,[149][150][151].…”

Section: Electrolytementioning

confidence: 99%

Plasma Electrolytic Oxidation (PEO) as a Promising Technology for the Development of High-Performance Coatings on Cast Al-Si Alloys: A Review

Fernández-López,

Alves,

San-Jose

et al. 2024

Coatings

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Cast Al-Si alloys, recognized for their excellent mechanical properties, constitute one of the most widely employed non-ferrous substrates in several sectors, and are particularly relevant in the transport industry. Nevertheless, these alloys also display inherent limitations that significantly restrict their use in several applications. Among these limitations, their low hardness, low wear resistance, or limited anti-corrosion properties, which are often not enough when the component is subjected to more severe environments, are particularly relevant. In this context, surface modification and the development of coatings are essential for the application of cast Al-Si alloys. This review focuses on the development of coatings to overcome the complexities associated with improving the performance of cast Al-Si alloys. Against this background, plasma electrolytic oxidation (PEO), an advanced electrochemical treatment that has revolutionized the surface modification of several metallic alloys in recent years, emerges as a promising approach. Despite the growing recognition of PEO technology, the achievement of high-performance coatings on cast Al-Si is still a challenge nowadays, for which reason this review aims to provide an overview of the PEO treatment applied to these alloys. In particular, the impact of the electrolyte chemical composition on the properties of the coatings obtained on different alloys exposed to harsh environments has been analyzed and discussed. By addressing the existing gaps and challenges, this paper contributes to a better understanding of the intricacies associated with the development of robust PEO coatings on cast Al-Si alloys.

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