Adsorption characteristics and lubricating performance of coolant components in cold rolling of aluminum

In the cold rolling of aluminum foil, coolants made with nonaromatic base oils provide poor lubricity compared with coolants made with conventional base oils. But there is no clear difference in lubricity between nonaromatic and conventional base oils in the case of the rolling of aluminum sheet. In evaluations of the adsorption activity of model base oil components, alkylbenzene with a longer alkyl chain shows the potential to enhance the adsorption activity of alcohol onto the nascent aluminum surface. In experimental rolling, furthermore, the lubrication performance of coolants using nonaromatic base oils can be improved with the addition of dodecylbenzene. The addition of 10 mass% of dodecylbenzene into a nonaromatic coolant is sufficient for practical lubrication performance in the cold rolling of aluminum.