Controlled Release from Core-Shell Nanoporous Silica Particles for Corrosion Inhibition of Aluminum Alloys

被引：4

作者：

Jiang, Xingmao ^{[1
,2
,3
]}

Jiang, Ying-Bing ^{[4
]}

Liu, Nanguo ^{[5
]}

Xu, Huifang ^{[6
]}

Rathod, Shailendra ^{[1
,2
]}

Shah, Pratik ^{[1
,2
]}

Brinker, C. Jeffrey ^{[1
,2
,7
]}

机构：

[1] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87106 USA

[2] Univ New Mexico, Ctr Microengineered Mat, Albuquerque, NM 87106 USA

[3] Lovelace Resp Res Inst, Aerosol & Resp Dosimetry Program, Albuquerque, NM 87108 USA

[4] Univ New Mexico, Transmiss Electron Microscopy Labs, Albuquerque, NM 87131 USA

[5] Dow Corning Corp, SCB Innovat Accelerator, Midland, MI 48686 USA

[6] Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA

[7] Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87185 USA

来源：

JOURNAL OF NANOMATERIALS | 2011年 / 2011卷

基金：

美国国家科学基金会; 美国能源部;

关键词：

COATINGS; CHROMATE; COMPOSITE;

D O I：

10.1155/2011/760237

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Cerium (Ce) corrosion inhibitors were encapsulated into hexagonally ordered nanoporous silica particles via single-step aerosol-assisted self-assembly. The core/shell structured particles are effective for corrosion inhibition of aluminum alloy AA2024-T3. Numerical simulation proved that the core-shell nanostructure delays the release process. The effective diffusion coefficient elucidated from release data for monodisperse particles in water was 1.0x10(-14) m(2)s for Ce3+ compared to 2.5x10 (13) m(2)s for NaCl. The pore size, pore surface chemistry, and the inhibitor solubility are crucial factors for the application. Microporous hydrophobic particles encapsulating a less soluble corrosion inhibitor are desirable for long-term corrosion inhibition.

引用

页数：10

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