Tribological Behaviour of Corrosion Inhibitors in Metal Working Fluids under Different Contact Conditions

Abstract:

The use of different process media such as cutting fluids, coolants, honing oil and washing media in typical machining operations exceeds 5,000 m³ per year. These media support critical functions such as lubrication, corrosion protection, cleaning and cooling, and have an enormous effect on the manufacturing performance. The tribological properties of these media are improved by using additive molecules, which are physically or chemically adsorbed on the surface of tools and workpieces. The additive performance is especially important in water lubricated tribosystems, where the environment is highly corrosive. The role of corrosion inhibitors typically applied is to neutralize the pH of contaminants in the fluid. Ethanolamines and ethylamines are known as ligands which can form chelate bonds with metals via their amino, hydroxyl and deprotonated hydroxyl-groups. In tribology they are widely spread, as corrosion inhibitors and detergents especially for water based lubricants. This study inquires the tribological performance of amine-based solutions in two types of tribotesters which apply different contact conditions. The dissimilar behaviour under rolling and sliding contact is explained in terms of the structure of the adsorbed compounds. Understanding the performance of the first chemisorbed layers of additives on the workpiece provides essential information for optimizing lubrication in aqueous solutions.

• Periodical: Advanced Materials Research (Volumes 966-967)
• Pages: 347-356
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.966-967.347
• Online since: June 2014
• Authors: Agnieszka Tomala*, Aldara Naveira Suarez, Manel Rodríguez Ripoll
• Keywords: Additive, Boundary Lubrication, Corrosion Inhibitors, Interaction, Molecular Orientation

References

[1] Rojas-Campanur M., Lara-Romero J., Chinas-Castillo F., Alonso-Nunez G.: Tribological Performance of Rosin Acid Additives in Water Based Lubricants. Tribology Online 2, 9-33 (2007).

DOI: 10.2474/trol.2.29

[2] Cambiella A., Benito J.M., Pazos C.: Interfacial properties of oil-in-water emulsions designed to be used as metalworking fluids. Colloids and Surfaces A: Physicochemical and Engineering Aspects 305, 112-119 (2007).

DOI: 10.1016/j.colsurfa.2007.04.049

[3] Persson K., Gahlin R.: Tribological performance of a DLC coating in combination with water based lubricants. Tribology International 36(11), 851-855 (2003).

DOI: 10.1016/s0301-679x(03)00103-8

[4] Fang L., Gao Y., Zhang Z.: Tribology of Si3N4 with different glassy phase content sliding against grey cast iron lubricated with water. Wear 255-229, 896-904 (1999).

DOI: 10.1016/s0043-1648(98)00408-6

[5] Haibing M., Jing L., Huan Ch., Guangzhi Z., Yi Y., Tianhui R., Yidong Z.: XPS and XANES characteristics of tribofilms and thermal films generated by two P- and/or S- containing additives in water-based lubricant. Tribology International 42(6), 940-945 (2009).

DOI: 10.1016/j.triboint.2009.01.004

[6] Kajdas C.: Additives for metalworking lubricants - a review. Lubrication Science 1, 385-409 (2006).

DOI: 10.1002/ls.3010010406

[7] Takahashia K., Shitaraa Y., Kaimaia T., Kannob A., Mori Sh.: Lubricating properties of TR Gel-lube-Influence of chemical structure and content of gel agent. Tribology International 232, 250-256 (2010).

DOI: 10.1016/j.triboint.2010.01.016

[8] Landolt D., Mischler S., Stemp M.: Electrochemical methods in tribocorrosion: a critical appraisal, Electrochimica acta 46, 3913-3929 (2001).

DOI: 10.1016/s0013-4686(01)00679-x

[9] Tomala A., Karpinska A., Werner W.S.M., Olver A.V., Störi H.: Tribological performance of additives for water-based lubricants. Wear 269 (11-12), 804-810 (2010).

DOI: 10.1016/j.wear.2010.08.008

[10] Tomala A., Werner W.S. M, Gebeshuber I.C., Dörr N. and Störi H., Tribochemistry of monomolecular lubricant films of ethanolamine oligomers. Tribology International, 42, 1513-1518 (2009).

DOI: 10.1016/j.triboint.2009.06.004

[11] Jeyaprabha C., Sathiyanarayanan S., Venkatachari G.: Corrosion inhibition of pure iron in 0. 5 m H2SO4 solutions by ethanolamines. Applied Surface Science, 246 (1-3), 108-116, (2005).

DOI: 10.1016/j.apsusc.2004.10.044

[12] Fouda A.S., Moussa M.N., Taha F.I., Elneanaa A.I.: The role of some thiosemicarbazide derivatives in the corrosion inhibition of aluminium in hydrochloric acid. Corrosion Science 26(9), 719-726, (1986).

DOI: 10.1016/0010-938x(86)90035-1

[13] Ali S. A., Saeed M.T., Rahman S.U.: The isoxazolidines: a new class of corrosion inhibitors of mild steel in acidic medium. Corrosion Science 45 (2), 253-266, (2003).

DOI: 10.1016/s0010-938x(02)00099-9

[14] Arab S.T., Al-Turkustani A.M.: Corrosion Inhibition of Steel in Phosphoric Acid by Phenacyldimethyl Sulfonium Bromide and some of its p-Substituted Derivatives. Port. Electrochim. Acta 24(1), (2006).

DOI: 10.4152/pea.200601053

[15] Sathiyanarayanan S., Marikkannu C., Palaniswamy N.: Corrosion inhibition effect of tetramines for mild steel in 1M HCl. Applied Surface Science, 241 (3-4), 477-484, (2005).

DOI: 10.1016/j.apsusc.2004.07.050

[16] Dubey A.K., Singh G.: Corrosion Inhibition of Mild Steel in Sulphuric Acid Solutionby Using Polyethylene Glycol Methyl Ether (PEGME). Portugaliae Electrochimica Acta 25, 221-235, (2007).

DOI: 10.4152/pea.200702221

[17] Chen-Hung Liao, Meng-Hui Li: Kinetics of absorption of carbon dioxide into aqueous solutions of monoethanolamine + N-methyldiethanolamine,. Chemical Engineering Science 57 (21), 4569-4582 (2002).

DOI: 10.1016/s0009-2509(02)00395-0

[18] Vazquez G., Antorrena G., Navaza J. M., Santos V.: Absorption of CO2 by water and surfactant solutions in the presence of induced Marangoni effect. Chemical Engineering Science 51 (12), (1996).

DOI: 10.1016/0009-2509(96)85979-3