Back to Search
Start Over
Tribological Performance of Environmentally Friendly Bio-Degradable Lubricants Based on a Combination of Boric Acid and Bio-Based Oils
- Source :
- Materials, Vol 13, Iss 3892, p 3892 (2020), Materials, Volume 13, Issue 17
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- Finding effective and environmentally friendly lubrication to use in sheet metal forming operations presents a substantial environmental and economic challenge to the automotive industry. This paper examines the effectiveness of different lubricants in the reduction of the coefficient of friction (COF) in the process of sheet metal forming of the low carbon steel sheets. These lubricants are based on a combination of boric acid (H3BO3) and edible vegetable oils, both of which are natural and environmentally friendly. To evaluate the friction characteristics of the lubricants in a forming operation, a strip drawing friction test is used. This test consisted in drawing a specimen in the form of a sheet metal strip between two non-rotating counter-samples with radii of 200 and 10 mm. The effectiveness of environmentally friendly lubricants in reducing the COF was compared to the traditional petroleum-based lubricants which are used in sheet metal-forming operations. The effect of lubricant conditions and tool surface roughness on the value of COFs is studied. It was found that palm oil in both configurations of countersample radius, both as pure oil and with the addition of 5 wt.% of H3BO3, was the most effective in lowering the coefficient of friction. In most of the conditions analysed, the addition of boric acid into vegetable oils leads to an increase in the lubrication efficiency by up to 15% compared to pure oils. The effectiveness of lubrication by olive and rapeseed oils in decreasing the frictional resistances clearly depends on the nominal pressure applied.
- Subjects :
- Materials science
Carbon steel
sheet metal forming
02 engineering and technology
engineering.material
lcsh:Technology
Article
Boric acid
chemistry.chemical_compound
0203 mechanical engineering
General Materials Science
Lubricant
Deep drawing
lcsh:Microscopy
lcsh:QC120-168.85
lcsh:QH201-278.5
lcsh:T
Metallurgy
Tribology
021001 nanoscience & nanotechnology
Environmentally friendly
coefficient of friction
steel sheet
020303 mechanical engineering & transports
chemistry
deep drawing
lcsh:TA1-2040
visual_art
engineering
Lubrication
visual_art.visual_art_medium
mechanical engineering
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
0210 nano-technology
Sheet metal
lcsh:Engineering (General). Civil engineering (General)
lcsh:TK1-9971
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Volume :
- 13
- Issue :
- 3892
- Database :
- OpenAIRE
- Journal :
- Materials
- Accession number :
- edsair.doi.dedup.....89812a7cf25a132833e36eddad539a0d