Corrosion protection of surfaces by nanocomposite and urethane top coatings

被引：4

作者：

Asmatulu, R ^{[1
]}

Claus, RO ^{[1
]}

Mecham, JB ^{[1
]}

Corcoran, SG ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Fiber & Electro Opt Res Ctr, Blacksburg, VA 24061 USA

来源：

Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics | 2005年 / 5761卷

关键词：

nanocomposite coating; urethane top layer; EIS; salt spray and corrosion;

D O I：

10.1117/12.601241

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In the present study, nanosized silica particles (similar to 100 nm) were incorporated into epoxy polymers, and then sprayed on molybdenum treated Al coupons (2024-T3) by a nozzle spray unit at different thicknesses. A urethane top coating (1 mil) was also applied on some of the initially coated surfaces. The main purpose of the SiO2 and urethane was to absorb/block unwanted ions/molecules (i.e., Cl-, O, OH-, H2O, etc.) and increase the coating performance. Several corrosion tests including electrochemical impedance spectroscopy (EIS), salt spray and salt soaking were conducted on the prepared samples using a 0.5 M NaCl solution. The Al coupons coated with such nanocomposites and a urethane top coating showed excellent coating resistances (8x10(9) Omega-cm(2)) against corrosion attack. As a result, it is assumed that this novel coating system will allow coating industry to effectively protect the surface of materials.

引用

页码：40 / 51

页数：12

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