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Journals / Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi / 2026 / Cilt: 32 Sayı: 6

Comparative performance of Cathodic Electrodeposition, powder, and zinc flake organic coatings on Nano‑Treated AA1050, AA5005, and AA7075 Aluminum Alloys

Nano-Yüzey işlemi uygulanmış AA1050, AA5005 ve AA7075 Alüminyum alaşımları üzerine uygulanan Katodik Elektroforetik, toz ve çinko pul organik kaplamaların karşılaştırmalı performansı

Canberk Minaz, Fatih Apaydın

Pages
1146–1154
Publication Date
2026-10-08
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Abstract

This study presents a comparative assessment of organic coating systems applied to nano-treated 1050, 5005, and 7075 aluminum alloys, aiming to enhance corrosion resistance in high-performance industrial environments. The alloys were subjected to a zirconium oxide-based nano pretreatment with varying activation durations (60–90 s) and coating times (6–8 min). Subsequently, three distinct organic coating methods were applied: cathodic electrodeposition (CED), powder coating, and zinc flake coating. The performance of the coatings was evaluated using cross-cut adhesion tests, cyclic corrosion tests (EN ISO 11997-1 Cycle B, Renault 47-01-000-E), and copper-accelerated acetic acid salt spray (CASS) tests (DIN 50 021). Coating thicknesses were determined via scanning electron microscopy (SEM). The findings revealed that zinc flake coatings failed the adhesion tests, whereas CED and powder coatings demonstrated high performance under optimized pretreatment conditions (90 s activation, 8 min nano coating). Notably, the 7075-alloy exhibited superior compatibility across multiple tests, achieving the highest corrosion resistance with CED coatings. These results offer a practical roadmap for selecting environmentally friendly and high-performance coating strategies for aluminum alloys intended for use in harsh service conditions

Özet

Bu çalışma, yüksek performanslı endüstriyel ortamlarda korozyon direncini artırmayı amaçlayan nano-işlem görmüş 1050, 5005 ve 7075 alüminyum alaşımlarına uygulanan organik kaplama sistemlerinin karşılaştırmalı bir değerlendirmesini sunmaktadır. Alaşımlar, değişken aktivasyon süreleri (60–90 sn) ve kaplama süreleri (6–8 dk) ile zirkonyum oksit bazlı bir nano ön işlem sürecine tabi tutulmuştur. Ardından üç farklı organik kaplama yöntemi uygulanmıştır: katodik elektro biriktirme (CED), toz kaplama ve çinko lamel kaplama. Kaplamaların performansı; cross-cut yapışma testleri, çevrimsel korozyon testleri (EN ISO 11997-1 Döngü B, Renault 47-01-000-E) ve bakır hızlandırmalı asetik asitli tuz püskürtme (CASS) testleri (DIN 50 021) ile değerlendirilmiştir. Kaplama kalınlıkları taramalı elektron mikroskobu (SEM) ile belirlenmiştir. Elde edilen bulgular, çinko lamelli kaplamaların yapışma testlerinde başarısız olduğunu; buna karşılık CED ve toz kaplamaların optimize edilmiş ön işlem koşullarında (90 sn aktivasyon, 8 dk nano kaplama) yüksek performans sergilediğini ortaya koymuştur. Özellikle 7075 alaşımı, çoklu testlerde üstün uyumluluk göstermiş ve CED kaplamalarla en yüksek korozyon direncine ulaşmıştır. Bu sonuçlar, zorlu hizmet koşullarında kullanılacak alüminyum alaşımlar için çevre dostu ve yüksek performanslı kaplama stratejilerinin seçimine yönelik pratik bir yol haritası sunmaktadır.

Keywords
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Cite This Article

Minaz, C., Apaydın, F. (2026). Comparative performance of Cathodic Electrodeposition, powder, and zinc flake organic coatings on Nano‑Treated AA1050, AA5005, and AA7075 Aluminum Alloys. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, Cilt: 32 Sayı: 6, 1146–1154. https://doi.org/10.65206/pajes.41499

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