Superhydrophobicity and corrosion resistance of AISI 4140 mold made through nanosecond laser texturing

2022 ◽  
Author(s):  
Byung-Chan Kim ◽  
Dong-Wook Lim ◽  
Ji-Hun Kim ◽  
Hyun-Taek Lee
Keyword(s):  
Corrosion Resistance ◽  
Nanosecond Laser ◽  
Laser Texturing ◽  
Aisi 4140

scholarly journals Nanosecond laser texturing for high friction applications

2014 ◽  
Vol 62 ◽  
pp. 9-16 ◽  
Author(s):  
Andrew Dunn ◽  
Jesper V. Carstensen ◽  
Krystian L. Wlodarczyk ◽  
Erica B. Hansen ◽  
Jack Gabzdyl ◽  
...  
Keyword(s):  
Nanosecond Laser ◽  
Laser Texturing

Surface functionalization of Zr-based metallic glass by direct nanosecond laser texturing

Vacuum ◽  
2021 ◽  
pp. 110635
Author(s):  
Yongfeng Qian ◽  
Minqiang Jiang ◽  
Zhiyu Zhang ◽  
Hu Huang ◽  
Jiwang Yan
Keyword(s):  
Metallic Glass ◽  
Surface Functionalization ◽  
Nanosecond Laser ◽  
Laser Texturing

scholarly journals Long-Term Influence of Laser-Processing Parameters on (Super)hydrophobicity Development and Stability of Stainless-Steel Surfaces

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2240 ◽  
Author(s):  
Peter Gregorčič ◽  
Marjetka Conradi ◽  
Luka Hribar ◽  
Matej Hočevar
Keyword(s):  
Contact Angle ◽  
Stainless Steel ◽  
Processing Parameters ◽  
Nanosecond Laser ◽  
Stainless Steel Surface ◽  
Textured Surfaces ◽  
Laser Texturing ◽  
Important Challenge ◽  
Faster Development

Controlling the surface wettability represents an important challenge in the field of surface functionalization. Here, the wettability of a stainless-steel surface is modified by 30-ns pulses of a Nd:YAG marking laser (λ = 1064 nm) with peak fluences within the range 3.3–25.1 J cm−2. The short- (40 days), intermediate- (100 days) and long-term (1 year) superhydrophilic-to-(super)hydrophobic transition of the laser-textured surfaces exposed to the atmospheric air is examined by evaluating its wettability in the context of the following parameters: (i) pulse fluence; (ii) scan line separation; (iii) focal position and (iv) wetting period due to contact angle measurements. The results show that using solely a short-term evaluation can lead to wrong conclusions and that the faster development of the hydrophobicity immediately after laser texturing usually leads to lower final contact angle and vice versa, the slower this transition is, the more superhydrophobic the surface is expected to become (possibly even with self-cleaning ability). Depending on laser fluence, the laser-textured surfaces can develop stable or unstable hydrophobicity. Stable hydrophobicity is achieved, if the threshold fluence of 12 J cm−2 is exceeded. We show that by nanosecond-laser texturing a lotus-leaf-like surface with a contact angle above 150° and roll-off angle below 5° can be achieved.

scholarly journals Modification of the copper wettability by nanosecond laser texturing

2021 ◽  
Vol 2119 (1) ◽  
pp. 012126
Author(s):  
M M Vasilev ◽  
Y G Shukhov ◽  
A A Rodionov ◽  
Y P Li ◽  
M K Lei
Keyword(s):  
Contact Angle ◽  
Laser Treatment ◽  
Environmental Exposure ◽  
Nanosecond Laser ◽  
Laser Texturing ◽  
Copper Surfaces ◽  
Over Time

Abstract Nanosecond laser microstructuring of copper surfaces was performed in this work. The contact angle value immediately after laser treatment decreased sharply and all samples were hydrophilic or superhydrophilic. Hydrophobization of the textured samples occurs as a result of environmental exposure over time. Oxidation and adsorption of carbon and its compounds from the atmosphere leads to a change in the wettability of the irradiated surfaces. The acceleration of hydrophobization process with decrease of fluence was found. It is shown that the stable contact angle, reached after one month, does not depend on the value of the fluence and is about 140°.

Mechanical, tribological, and corrosion properties of composite NiP-Al2O3 with different amount of particles

2021 ◽  
pp. 1-32
Author(s):  
Renato Pessoa ◽  
Carlos A H Laurindo ◽  
Michelle S Meruvia ◽  
Ricardo D Torres ◽  
Alexandre Mikowski ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Al2o3 Particle ◽  
Corrosion Properties ◽  
Mechanical Stirring ◽  
Wear And Corrosion ◽  
Sample Orientation ◽  
Aisi 4140 ◽  
Al2o3 Particles ◽  
Wear And Corrosion Resistance ◽  
Number Of Particles

Abstract In this study, the influence of Al2O3 particle amounts on the mechanical, tribological, and corrosion properties of the composite NiP-Al2O3 coating was evaluated. AISI 4140 steel was coated with NiP through an autocatalytic bath with the addition of Al2O3 particles maintained in suspension by mechanical stirring. Following, the coated samples were annealed at 600 °C to increase the hardness and to create an interdiffusion layer, which improves coating adhesion and corrosion resistance. The coating surface was characterized by SEM/EDS, XRD, microhardness, wear resistance, and corrosion tests. The results showed that the coating particles' amount depends on the bath agitation speed, the sample orientation during the deposition, and the volume of Al2O3 particles in the bath composition. Also, the number of particles in the coating affects the deposition kinetics, the thickness of the interdiffusion layer, which affects the wear and corrosion resistance.

scholarly journals The Effect of Pulsed Nanosecond Laser Irradiation on the Corrosion Resistance of Mg–Al–Zn Magnesium Alloy

2020 ◽  
Vol 11 (3) ◽  
pp. 547-551
Author(s):  
S. A. Bozhko ◽  
S. S. Manokhin ◽  
A. Yu. Tokmacheva-Kolobova ◽  
Yu. Yu. Karlagina ◽  
A. E. Ligachev
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Laser Irradiation ◽  
Nanosecond Laser

scholarly journals Influence of laser power in nanosecond laser texturing for a hydrophobic state on SS316L

2021 ◽  
Vol 15 (4) ◽  
pp. 8592-8600
Author(s):  
M.H. Zul ◽  
Mahadzir Ishak@Muhammad ◽  
M. H. Aiman ◽  
M. M. Quazi
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Laser Power ◽  
Surface Engineering ◽  
Hydrophobic Surface ◽  
Morphological Properties ◽  
Nanosecond Laser ◽  
Time Interval ◽  
Beam Diameter ◽  
Laser Texturing

The use of lasers in surface engineering has recently made significant progress. The hydrophobic surface is commonly studied because of the application in various fields, including vehicles, aerospace, biomedicine, etc. Since these laser methods require many combination parameters, such as laser power (P), frequency (ƒ), scan speed (ʋ) and laser beam diameter (D), the effect of the parameters must therefore be investigated to produce the hydrophobic condition. This research tries to relate the laser power with the morphological properties and contact angle of the SS316L surfaces. Samples are subjected to laser texturing with different laser power settings. The surface is then characterised by surface roughness, and the contact angle is measured according to a specific time interval. The laser power output and energy density function on the surface and contact angle were investigated in these contexts experimentally. Surface roughness was defined and validated to show that the laser parameters' effect is effective and controllable. This study shows that the laser output intensity significantly contributes to regulating surface roughness and the substrate's wetting activity. The 18W and 24W laser outputs produce a spiked surface with various peaks that cause the surface to become hydrophobic over time because of the air-trap that happens in the valley.

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