Effect of Ce(III) and Ce(IV) ions on the structure and active protection of PMMA-silica coatings on AA7075 alloy

被引：22

作者：

Trentin, A. ^{[1
]}

Harb, S., V ^{[1
]}

Uvida, M. C. ^{[1
]}

Marcoen, K. ^{[2
]}

Pulcinelli, S. H. ^{[1
]}

Santilli, C., V ^{[1
]}

Terryn, H. ^{[2
]}

Hauffman, T. ^{[2
]}

Hammer, P. ^{[1
]}

机构：

[1] Sao Paulo State Univ, Inst Chem, BR-14800060 Araraquara, SP, Brazil

[2] Vrije Univ Brussel, Dept Electrochem & Surface Engn, Pl Laan 2, B-1050 Brussels, Belgium

来源：

CORROSION SCIENCE | 2021年 / 189卷

基金：

巴西圣保罗研究基金会;

关键词：

Organic coatings; Inhibition; Aluminium alloy; Intermetallics; EIS; SIMS; SOL-GEL COATINGS; CORROSION PROTECTION; HYBRID COATINGS; ALUMINUM-ALLOYS; CERIUM; INHIBITORS; POLYMERIZATION; AA2024-T3; CHLORIDE; STEEL;

D O I：

10.1016/j.corsci.2021.109581

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work investigates the effect of Ce(III) and Ce(IV) additives on the structure and anti-corrosion properties of poly(methyl methacrylate) (PMMA)-silica coatings on AA7075 aluminium alloy. The results revealed that intermediate Ce(IV) loadings (500 and 1000 ppm) result in a dense hybrid network with a less defective polymeric phase, extending the service time of AA7075 up to 835 days in 3.5% NaCl. Although both additives provide longterm protection, the self-healing ability was observed only for Ce(IV) addition, favoured by the formation of oxides/hydroxides at pH-3. These properties make the 4 mu m-thick PMMA-silica-Ce(IV) coatings very interesting for chromium-free protection technologies.

引用

页数：13

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