Antiwear additives adhesion

Adhesion promoters Antifogging agents Antistatic agents Antiwear additives Coupbng agents... 

On the other hand, there are the data for the influence of compounded antiwear additives in ester-type fluids, as shown in Table 14-1, These data show good conformity with the partial elastohydrodynamic wear model and the effect of compounded antiwear additives is what is anticipated in an adhesive wear process. 

An important aspect of the function of compounded lubricants is to increase the load that can be carried by machinery without catastrophic damage to the rubbing components. Since the typical antiwear additives affect the viscosity of the carrier oil very little, it is not a fluid film effect that is responsible for the load-carrying augmentation. Examination of the various basic wear processes leads to the choice of the adhesive mechanism as the one most likely to respond to the action of boundary or extreme-pressure additives. The type of macroscopically observed severe wear which has this mechanistic process as its primary cause is generally designated as icu i ng (c(S. Chapter 13, Sections 13.4 and 13.6), and it is in this sense, as a description rather than a definition, that the term scuffing is used in the discussion to follow. 

The modeling of lubricant antiwear action as a competition at the asperity junctions between metal-to-metal adhesion and additive reaction, as proposed by Dorinson [9] and by Dorinson and Broman [10], was discussed in Chapter 10, Section 10.7 and Chapter 11, Section 11.2.2. The rate of wear depends on the surface concentration of asperity adhesions, denoted here by [M ], the time-dependent relation for which is... 

EINECS 246-614-4 Isooctyl phosphite ((C8H170)3P) Phosphorous acid, triisooctyl ester Triisooctyl phosphite Weston TIOP. Intermediate insecticides lubricant additive specialty solvents stabilizer for acrylics, nylon, unsaturated polyester, PVC improves antiwear and antifriction properties. Stabilizer tor hot-melt adhesives. PU, polyesters used in molding, extrusion, and film applications in PP, HOPE, LDPE, PVC, and polyesters also useful for PP fiber applications and calendering of PVC. Oil d = 0.891. Albright i Wilson Americas Inc. GE Specialities Stave. 

Figure 4.18 Optical micrographs collected on wear traces obtained in the presence of (A) 1 % Sr octanoate in dodecane and (B) 1 % overbased Ca octanoate in dodecane after ultrasonic cleaning in pentane at the end of tests of 2000 cycles. The total elimination of the antiwear film, in the case of Sr additive, shows that adhesion of the Sr antiwear film is weaker than the Ca one. The presence of polishing scratches on the initial surfaces under the film points out the exceptional efficiency of the additives. (C) Ca octanoate antiwear film extraction by the stress applied using the tip of a mechanical profilometer...

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