Corrosion Properties of Polydopamine Coatings Formed in One-Step Immersion Process on Magnesium

被引：104

作者：

Singer, Ferdinand ^{[1
]}

Schlesak, Magdalena ^{[1
]}

Mebert, Caroline ^{[1
]}

Hoehn, Sarah ^{[1
]}

Virtanen, Sannakaisa ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Dept Mat Sci, Chair Surface Sci & Corros, D-91058 Erlangen, Germany

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 48期

关键词：

magnesium; polydopamine; FTIR; corrosion; coating; SURFACE-CHEMISTRY; RESISTANCE; BEHAVIOR; FILMS;

D O I：

10.1021/acsami.5b08760

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Polydopamine layers were polymerized directly from Tris(hydroxymethyl)aminomethane-buffered solution in a one-step immersion process onto magnesium surface. Scanning electron microscopy showed successful formation of a similar to 1 mu m thick layer. ASTM D3359-09 "Tape test" revealed excellent adhesion of the layer. X-ray induced photoelectron spectroscopy and Fourier transform infrared spectroscopy verified the presence of polydopamine on the surface. Corrosion measurements were performed in 0.1 M NaCl solution investigating the influence of coating parameters: dopamine concentration, immersion time, solution pH, and immersion angle. Tafel analysis revealed strong improvement of corrosion behavior compared to bare magnesium. Polydopamine layers prepared with optimized coating procedure showed promising corrosion properties in Dulbecco's modified Eagle medium. In summary, polydopamine coatings offer a simple treatment for magnesium to improve the corrosion behavior and could further act as intermediate layer for further surface functionalization.

引用

页码：26758 / 26766

页数：9

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