A METHOD IN THE MECHANICAL WORKING OF ALUMINIUM AND ALUMINIUM ALLOYS IN THE PRESENCE OF A COOLING LUBRICANT, AND A CONCENTRATE OF THE COOLING LUBRICANT

摘要

Mechanical working of aluminium or aluminium alloys is carried out in the presence of a water-based cooling lubricant, which has the form of a stable solution and contains as lubricating and corrosion inhibiting agents a combination of (a) a carboxyl compound having a hydrophobic group of 7-14 carbon atoms and (b) a tertiary alkyl alkanol amine having a molecular weight of less than 300. The amounts of the carboxyl compound and the tertiary alkyl alkanol amine are chosen so that a base/acid equivalent ratio between the alkanol amine and the carboxyl compound is less than 1.0. A concentrate, which after dilution with water, may be used as a cooling lubricant is also disclosed.