The Effect of Laser Texturing of Steel Surfaces and Speed-Load Parameters on the Transition of Lubrication Regime from Boundary to Hydrodynamic

The effectiveness of blends consisting of base oil, some secondary zinc dialkyl dithiophosphate (ZDDP), and different detergents to form antiwear tribofilms on steel surfaces sliding in the boundary lubrication regime was investigated in the temperature range of 105–125°C. The efficacy of the tribofilms formed from these blends was evaluated in terms of contact voltage and wear rate measurements. The best antiwear performance was demonstrated by the tribofilm formed from the blend containing sulphonate detergent. The results of this study provide insight into competing effects between ZDDP and different detergents that affect significantly the antiwear performance of the formed tribofilms.

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The Effect of Laser Texturing of Steel Surfaces on Film Lubriction Based on Stribeck Curves

Advanced Tribology ◽

10.1007/978-3-642-03653-8_222 ◽

2009 ◽

pp. 685-687

Author(s):

Hongbin Liu ◽

Rongjun Niu ◽

Yonggang Meng

Keyword(s):

Laser Texturing ◽

Steel Surfaces ◽

Stribeck Curves

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Ultralow Friction of Steel Surfaces Using a 1,3-Diketone Lubricant in the Thin Film Lubrication Regime

Langmuir ◽

10.1021/acs.langmuir.5b02315 ◽

2015 ◽

Vol 31 (40) ◽

pp. 11033-11039 ◽

Cited By ~ 15

Author(s):

Ke Li ◽

Tobias Amann ◽

Mathias List ◽

Michael Walter ◽

Michael Moseler ◽

...

Keyword(s):

Thin Film ◽

Thin Film Lubrication ◽

Ultralow Friction ◽

Lubrication Regime ◽

Steel Surfaces ◽

Film Lubrication

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Formation of Tribofilms from Surfactants with Different Degrees of Ethoxylation on Steel Surfaces in the Boundary Lubrication Regime

Surfactants in Tribology, Volume 5 ◽

10.1201/9781315120829-13 ◽

2017 ◽

pp. 201-237

Author(s):

F. Quintero ◽

J.M. González ◽

J. de Vicente Álvarez ◽

J.E. Arellano ◽

S. Rosales

Keyword(s):

Boundary Lubrication ◽

Lubrication Regime ◽

Steel Surfaces

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In-Liquid Lateral Force Microscopy of Micropatterned Surfaces in a Fatty Acid Solution under Boundary Lubrication

Scientific Reports ◽

10.1038/s41598-019-51687-8 ◽

2019 ◽

Vol 9 (1) ◽

Author(s):

Masaki Tsuchiko ◽

Saiko Aoki

Keyword(s):

Surface Morphology ◽

Acid Solution ◽

Stearic Acid ◽

Boundary Lubrication ◽

Lateral Force ◽

Lateral Force Microscopy ◽

Force Microscopy ◽

Lubrication Regime ◽

Frictional Forces ◽

Steel Surfaces

Abstract This study aims to investigate the influence of surface morphology on boundary-lubricated friction in a stearic acid solution. The surface morphology was controlled by fabricating submicrometer line-and-space patterns on Si(100) surface via photolithography. The boundary-lubricated friction on the patterns was measured by in-liquid lateral force microscopy for both transverse and longitudinal ridges, with respect to the sliding direction; the highest friction was observed on longitudinal ridges and grooves, which is in agreement with the tendency observed in our previous friction studies on steel surfaces. To further investigate this phenomenon, some additional patterns having different submicrometer morphologies were prepared and their friction characteristics were investigated. On the patterns not allowing the fluid to flow along the grooves, the frictional forces were equivalent for transverse and longitudinal grooves and ridges. Therefore, the high friction observed on the longitudinal ridges was caused by flowing out of fluid along the grooves, and it was possible to conclude that the fluidity around the submicrometer ridges and grooves influences the friction-reducing effect of stearic acid in boundary lubrication regime.

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Study of the wettability behavior of stainless steel surfaces after ultrafast laser texturing

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2018.08.030 ◽

2018 ◽

Vol 352 ◽

pp. 370-377 ◽

Cited By ~ 19

Author(s):

C. Sciancalepore ◽

L. Gemini ◽

L. Romoli ◽

F. Bondioli

Keyword(s):

Stainless Steel ◽

Ultrafast Laser ◽

Laser Texturing ◽

Steel Surfaces

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Nanosecond Laser Fabrication of Hydrophobic Stainless Steel Surfaces: The Impact on Microstructure and Corrosion Resistance

Materials ◽

10.3390/ma11091577 ◽

2018 ◽

Vol 11 (9) ◽

pp. 1577 ◽

Cited By ~ 11

Author(s):

Mehran Rafieazad ◽

Jaffer Jaffer ◽

Cong Cui ◽

Xili Duan ◽

Ali Nasiri

Keyword(s):

Stainless Steel ◽

Base Metal ◽

Melting Process ◽

Contact Angles ◽

Laser Surface Texturing ◽

Nanosecond Laser ◽

Textured Surfaces ◽

Laser Texturing ◽

Steel Surfaces ◽

The Impact

Creation of hydrophobic and superhydrophobic surfaces has attracted broad attention as a promising solution for protection of metal surfaces from corrosive environments. This work investigates the capability of nanosecond fiber laser surface texturing followed by a low energy coating in the fabrication of hydrophobic 17-4 PH stainless steel surfaces as an alternative to the ultrashort lasers previously utilized for hydrophobic surfaces production. Laser texturing of the surface followed by applying the hydrophobic coating resulted in steady-state contact angles of up to 145°, while the non-textured coated base metal exhibited the contact angle of 121°. The microstructure and compositional analysis results confirmed that the laser texturing process neither affects the microstructure of the base metal nor causes elemental loss from the melted regions during the ultrafast melting process. However, the electrochemical measurements demonstrated that the water-repelling property of the surface did not contribute to the anticorrosion capability of the substrate. The resultant higher corrosion current density, lower corrosion potential, and higher corrosion rate of the laser textured surfaces were ascribed to the size of fabricated surface micro-grooves, which cannot retain the entrapped air inside the hierarchical structure when fully immersed in a corrosive medium, thus degrading the material’s corrosion performance.

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