Fabrication of Super-Hydrophobic Surface on Stainless Steel Using Chemical Etching Method

2013 ◽  
Vol 562-565 ◽  
pp. 33-38 ◽  
Author(s):  
Hai Feng Zhang ◽  
Xiao Wei Liu ◽  
Min Zhao ◽  
Dong Bo Wang ◽  
Chang Zhi Shi
Keyword(s):  
Stainless Steel ◽  
Superhydrophobic Surface ◽  
Chemical Etching ◽  
Steel Surface ◽  
Hydrophobic Surface ◽  
Solution Concentration ◽  
Etching Time ◽  
Stainless Steel Surface ◽  
Water Contact ◽  
Steel Disc

Superhydrophobic surface have many applications such as drag reduction in the micro-electromechanical systems. A novel method of fabricating superhydrophobic surface is proposed using the simple wet chemical etching in this paper. Firstly, the surface of steel disc is polished by abrasive paper and then treated with chemical etching. Secondly, the surface of steel is modified with 1H,1H,2H,2H-Perfluorooctyltrimethoxysilane. The superhydrophobic surface was obtained on the stainless steel surface. Finally, the effects of the etching time and etching solution concentration were analyzed to the superhydrophobic performance. The experimentation results show that superhydrophobic performance is the best when the HCl concentration is 2mol/L, the etching time is 20 minute respectively. The water contact angle (CA) of the rotor surface is 152°. The water droplets are hardly able to stick to the steel surface．

Effects of Acid Concentration on the Superhydrophobic Surface on Aluminum Alloy by Etching and PP-Coating

2013 ◽  
Vol 763 ◽  
pp. 49-52 ◽  
Author(s):  
Wen Yong Liu ◽  
Lin Yu Sun ◽  
Ruo Mei Wu ◽  
Yi Chen ◽  
Yue Jun Liu
Keyword(s):  
Contact Angle ◽  
Aluminum Alloy ◽  
Hydrochloric Acid ◽  
Acid Concentration ◽  
Superhydrophobic Surface ◽  
Hydrophobic Surface ◽  
Etching Time ◽  
Hydrochloric Acid Concentration ◽  
Water Contact ◽  
Obvious Effect

We investigated the effect of hydrochloric acid concentration for preparing the superhydrophobic surface on aluminum alloy by etching and PP coating. The superhydrophobicity of the surface was characterized by water contact angle. The morphologies of the surface were observed by SEM. The results showed that the acid concentration had an obvious effect on the hydrophobic surface and a good superhydrophobic surface was achieved by PP coating after etching for suitable time. When the acid concentration is lower, the longer time is necessary for obtaining the superhydrophobic surface. When the concentration of hydrochloric acid was 4 g/L and the etching time was only 8 min, the best superhydrophobic surface with the highest contact angle (CA) of 157° was prepared. The obtained superhydrophobic surface resulted from the rough surface and the material of PP with the low surface energy.

Fabrication of Superhydrophobic Surfaces of Titanium Dioxide and Nickel through Electrochemical Deposition on Stainless Steel Substrate

2010 ◽  
Vol 434-435 ◽  
pp. 496-498 ◽  
Author(s):  
Ya Wei Hu ◽  
Shan Liu ◽  
Si Ya Huang ◽  
Wei Pan
Keyword(s):  
Stainless Steel ◽  
Steel Surface ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Stainless Steel Surface ◽  
Textured Surface ◽  
Water Contact ◽  
Compound Coating ◽  
Surface Superhydrophobicity ◽  
Scanning Electron

Binary microstructures at both micro- and nano-scale are constructed by the electrochemical depositing Ni and TiO2 on the stainless steel surface. Superhydrophobicity is achieved with a water contact angle greater than 150° after modifying the textured surface with fluoroalkylsilane (FAS-17, CF3(CF2)7CH2CH2Si(OCH3)3). The morphology of the Ni-TiO2 compound coating is studied by scanning electron microscopy.

scholarly journals Study on the effect of Weber Number to heat transfer of multiple droplets on hot stainless steel surface

2018 ◽  
Vol 154 ◽  
pp. 01114 ◽  
Author(s):  
Aria Riswanda ◽  
Indro Pranoto ◽  
Deendarlianto ◽  
Indarto ◽  
Teguh Wibowo
Keyword(s):  
Stainless Steel ◽  
Surface Temperature ◽  
Weber Number ◽  
Steel Surface ◽  
Cooling System ◽  
Spray Cooling ◽  
Stainless Steel Surface ◽  
Temperature Decrease ◽  
Evaporation Time ◽  
Decrease Rate

Multiple droplets are drops of water that continuously dropped onto a surface. Spray cooling is an application of the use of droplet on a cooling system. Spray cooling is usually used in a cooling system of electronic devices, and material quenching. In this study, correlations between Weber number and surface temperature decrease rate during multiple droplets impingement are investigated and analyzed. Visualization process is used to help determine the evaporation time of droplets impingement by using high speed camera. Induction stove is used to maintain a stainless steel surface temperature at 120°C, 140°C, and 160°C. The Weber number was varied at 15, and 52.5 to simulate low and medium Weber number. The result of this study shows that increase in Weber number does not increase the temperature decrease rate noticeably. Whereas the Weber number decrease the time required for surface temperature to reach its lowest surface temperature. It was also found that for low and medium Weber number, Weber number affect the evaporation time of multiple droplets after impingement.

Adhesion characteristics of whole milk powder to a stainless steel surface

1998 ◽  
Vol 97 (3) ◽  
pp. 191-199 ◽  
Author(s):  
Paul R. Rennie ◽  
X.D. Chen ◽  
Antony R. Mackereth
Keyword(s):  
Stainless Steel ◽  
Steel Surface ◽  
Milk Powder ◽  
Stainless Steel Surface ◽  
Whole Milk ◽  
Whole Milk Powder
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