Abstract: A composite material can include a carrier material that is coated, at least over part of the surface, with a corrosion protection layer made of an aluminum alloy. The composite material can provide a defined, effective, durable corrosion protection and simultaneously have a high recycling potential. The aluminum alloy of the corrosion protection layer can have the following composition in % by weight: 0.8 ? Mn ? 1.8 Zn ? 0.05 Cu ? 0.05 Si ? 1.0 Cr ? 0.25 Zr ? 0.25 Mg ? 0.10 remainder aluminum and unavoidable impurities, individually a maximum of 0.05% by weight, in total a maximum of 0.15% by weight.

Abstract: In a method for recovering lubricant or lubricant concentrate from a used mixture containing lubricant, the mixture containing lubricant and which is substantially dewatered is subjected to short path distillation at a temperature of at least 150° C. and a pressure of less than 1.5 mbar, in order to obtain a lubricant concentrate which can be recycled into cooling lubricants and which is free of very finely wear debris, metal soaps and polymers.

Abstract: A method for the production of an absorber plate for solar collectors from a strip of metal, in particular of aluminum or an aluminum alloy, includes coating the strip using a coil coating process with a highly selective coating, which has very good absorptive properties for sunlight and ensures very little heat emission.

Abstract: In a slide valve closure for the casting of a metal melt a slider plate and a stationary closure part are braced against each other by means of spring units or by other means. There is provided a casing framework attachable to a mould or the like, in which is fixed a detachable casing part on which the spring units are held and in which the stationary closure part and the slider plate can be accommodated. This allows safe operation and simple and rapid mounting and dismounting of the slide valve closure.