Presentation on theme: "Bench Screening of Novel Anti-Wear Alternatives"— Presentation transcript:
1 Bench Screening of Novel Anti-Wear Alternatives to ZDDPThis presentation compares a number of different antioxidants in several base oils, formulations, and test methods.This study provides a benchmark for comparing different formulation technologies, competitive materials, as well as our own experimental developments.Victor Bakunin, Trade and Technical representative, CISMoscow, RussiaCyril Migdal, Director, Petrochemical AdditivesMiddlebury, CT, USA
2 CHEMTURA – a new brand at the Oils and Additives market The chemicalcompanyof the future
4 Our Additives Trademarks Naugalube® and Naugard® antioxidants;Calcinate™, Hystrene® and Industrene® anti-wear agents;Lobase®, Hybase® and Petronate® sulfonate detergents;Synton® high-viscosity polyalphaolefins (PAO);G-2000™ high-quality lubricants;Durad® additives based on organic phosphates;Reolube® non-combustible lubricants and fluids (phosphates);Reomol® and KP-140® special additives (phosphates);ANDEROL®, AOSyn®, PQ® special lubricants;Hatcol® esters and ester lubricants (ready-to-use and basestocks);Royco® aircraft lubricants.
5 EUROPE RUSSIA Standard Approval Date Euro 1 October 1993 Euro 2
6 Zinc dialkyldithiophosphate (ZDDP) - more than simply anti-wear protectionWillermet et al, Trib. Inter., 5/95Zinc is the base for the formation of tribolayers (Zinc Polyphosphate)ZDDP is an antioxidantZDDP is a synergist for Mo-containing additives
8 Effect of CHP on anti-wear properties of engine lubricants (four-ball test machine) Ди, ммThis side shows that as more cumene hydroperoxide (CHP) is added to the oil the wear scar increases. It increases only modestly in oils containing a good antiwear such as ZDDP. When no antiwear is present, the wear increases dramatically with addition of CHP. The maximum separation in wear scar in oils with and without antiwear is when the CHP is at 1wt% in the oil.ASTM D 4172
9 Effect of CHP on anti-wear properties of engine lubricants (Cameron-Plint)Ди, ммThis side shows that as more cumene hydroperoxide (CHP) is added to the oil the wear scar increases. It increases only modestly in oils containing a good antiwear such as ZDDP until 2 wt% CHP is added. When no antiwear is present, the wear in the HDD oil increases dramatically with and without CHP present. When no antiwear is present, the wear in the PCMO oil increases dramatically with increasing amount of CHP present. The maximum separation in wear scar in oils with and without antiwear is when the CHP is at 1wt% in the oil.
14 Anti-wear properties of engine lubricants containing silanes (Cameron-Plint) Silanes & ZDDP synergy!Max. fin wear depth (uм)The results are discussed below going from left to right on the slide:The oil used as a base fluid is a prototype ILSAC GF-3, SAE 5W-200.1 wt% P (Phosphorus) from ZDDP (Good Reference).0.05 wt% P (Phosphorus) from ZDDP, note that results are worse than the fully formulated oilLA-2539 is the cyclic thiourea and when substituted into the formula for ZDDP, it performs as well as ZDDP.LA-2607 is the phenolic borate and when substituted into the formula for ZDDP, it performs as well as ZDDP.No AW is the formula without any anti-wear, either ashless or ZDDP (Poor Reference).
15 Anti-wear additives based on esters MLA-2837Ashless, no S & PSynergism with ZDDPFree-flowing clear liquidNon-corrosive
19 Selection criteria Use conditions Price/Quality Corrosive power Activation temperature/ pressurePrice/QualityCorrosive powerVolatilityColorSolubilityCompatibility with sealantsSmellPhysical conditionToxicityCompatibility with packagingDuration of actionMultifunctionalityAO; AF; contribution to EP
20 ConclusionsAs an anti-wear catalytic agent, CHP reliably distinguishes among lubricants with respect to anti-wear qualities in tests on a four-ball friction machine and the Cameron-Plint tribometer.By screening various compounds, it was possible to identify several quality classes of potential anti-wear additives for engine lubricants as replacements for zinc dialkyldithiophosphate:Heterocycles with Sulfur/Nitrogen atomsEsters with Nitrogen atoms (CHON)Silanes/Siloxanes