search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
Lube-Tech Croda BSA in HDD Engine Oil Fig 13: SAE 40 monograde CF-4 engine oil formulations.


The work carried out so far has been based on full replacement of the Bright Stock, but now we examine partial replacement performance. The formulations in Fig 13 are typical of a fully formulated Group I based mono grade heavy duty engine oil.


As well as viscosity modification, the BSA can improve the viscosity index of the formulation without the addition of viscosity index improvers. The effect can be seen in both gear and automotive formulations; even at lower concentrations there is marked improvement to the VI (Fig 13).


PUBLISHED BY LUBE: THE EUROPEAN LUBRICANTS INDUSTRY MAGAZINE


No.126 page 5


Testing carried out was again on the MTM with the conditions as set out in Fig 14.


Fig 14: Measured initially and after 2 hours rubbing at 0.5 ms-1.


Friction Coefficient vs Log Speed (m/s) Conditions:


In this test we evaluated the capability of the fluid to protect the surface over a period of time through coefficient of friction (Fig 15) and subsequent wear characteristic (Fig 16). We do this by measuring an initial stribeck curve and then after rubbing the surface for 2 hours at a constant load.


This should activate any anti-wear additives in the formulation, such as Zinc dialkyldithiophosphate (ZDDP). It can be clearly seen that on the initial test there is very little difference between the Bright stock and the BSA enhanced formulation, exhibiting almost identical curves. After 2 hours rubbing, significant differences are now demonstrated: Whereas the


Fig 15: Stribeck Curves, initial and after 2 hours.


32


LUBE MAGAZINE NO.155 FEBRUARY 2020


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60