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Formation of porous hydrophobic stainless steel surfaces by maskless electrochemical machining

Author:
Wei, H.  Wang, G.  Liu, G.  Guo, Z.  


Journal:
SURFACE ENGINEERING


Issue Date:
2016


Abstract(summary):

Surface topography is an important feature, which directly affects the friction, corrosion and flow characteristics of a workpiece. In this study, a new approach was explored to produce a microporous structure by maskless electrochemical machining (ECM). A rough surface with a microporous structure was created on a stainless steel substrate, and the principle of the micropore formation was investigated. It was found that the microporosity could form, grow and interconnect when the potential of the anodic surface was higher than the pitting potential of the material. The electric field is an important factor, and the surface topography can be altered by changing the electrical parameters. The porous microstructure was observed by laser scanning confocal microscopy. The rough and porous surface, modified with 1-dodecanethiol, exhibits hydrophobic characteristics, with a static contact angle of 137 degrees for water droplets. This is a significant improvement in the wetting properties for stainless steels.


Page:
132---138


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