Corrosion inhibition using superhydrophobic films

被引:148
作者
Barkhudarov, Philip M. [1 ,4 ]
Shah, Pratik B. [2 ]
Watkins, Erik B. [1 ,5 ]
Doshi, Dhaval A. [1 ]
Brinker, C. Jeffrey [2 ,3 ]
Majewski, Jaroslaw [1 ]
机构
[1] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA
[2] Univ New Mexico, Ctr Microengineered Mat, Albuquerque, NM 87106 USA
[3] Sandia Natl Labs, Albuquerque, NM 87106 USA
[4] Univ Utrecht, NL-3508 TC Utrecht, Netherlands
[5] Univ Calif Davis, Davis, CA 95616 USA
关键词
aluminium; sputtered films; organic coatings; neutron reflectivity; saltwater corrosion;
D O I
10.1016/j.corsci.2007.10.005
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Neutron reflectivity (NR) was used to study the effectiveness of superhydrophobic (SH) films as corrosion inhibitors. A low-temperature, low-pressure technique was used to prepare a rough, highly porous organosilica aerogel-like film. UV/ozone treatments were used to control the surface coverage of hydrophobic organic ligands on the silica framework, allowing the contact angle with water to be continuously varied over the range of 160 degrees (SH) to <10 degrees (hydrophilic). Thin (similar to 5000 angstrom) nano-porous films were layered onto aluminium surfaces and submerged in 5 wt% NaCl in D2O. NR measurements were taken over time to observe interfacial changes in thickness, density, and roughness, and therefore monitor the corrosion of the metal. NR shows that the SH nature of the surface prevents infiltration of water into the porous SH film and thus limits the exposure of corrosive elements to the metal surface. Published by Elsevier Ltd.
引用
收藏
页码:897 / 902
页数:6
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