Anti-friction properties of ester additives during hot rolling of aluminum{copyright}
- Alcan International Limited, Ontario (Canada); and others
Heavy esters of polyhydric alcohols, such as glycerol and synthetic polyols, are commonly used as additives in aluminum hot rolling lubricants. The presence of several hydroxyl groups allows a varying degree of esterification leading to the formation of full and partial esters. These esters are rarely separated from the main additive, and thus may be present in the finished rolling lubricant, affecting its anti-friction properties. The objective of this work was to examine the anti-friction properties of these potential ester contaminants during rolling on a laboratory hot rolling mill. Two lubricant application methods were examined; as emulsion and direct (neat oil) application. The anti-friction properties of additives were found to depend on their chemical structure and the lubricant applications method. In emulsified oils, partial esters of glycerol were found to greatly reduce friction in comparison to triglycerides, while the partial esters of synthetic polyols exhibited only a weak anti-friction effect. There was no frictional advantage observed which could be associated with using the partial esters in direct application mode. Moreover, under these conditions, the anti-friction properties of the completely esterified synthetic polyols were significantly lower than those of triglycerides, while in emulsions they were comparable. 11 refs., 7 figs., 3 tabs.
- OSTI ID:
- 111280
- Journal Information:
- Lubrication Engineering, Vol. 51, Issue 8; Other Information: PBD: Aug 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Phase diagrams of a cold rolling emulsion for aluminum{copyright}
Catalytic Upgrading of bio-oil using 1-octene and 1-butanol over sulfonic acid resin catalysts