Abstract: Novel aqueous coolants with improved temperature stability contain (A) water; (B) at least one alkylene glycol, alkylene glycol monoalkyl ether, or glycerol; (C) at least one phosphate, carbonate, and/or sulfate in the form of its free acids or its salts; (D) at least one hard water stabilizer; and optionally, further inhibitors and typical coolant constituents. The aqueous coolants are useful, for example, in internal combustion engines.

Abstract: The invention relates to a process for producing a composite component from a plastic structure (1, 25, 31, 37) and a metal body (4, 25, 35, 40) by bringing together joining tools (11, 13). Plastic structure (1, 25, 31, 37) and metal body (4, 25, 35, 40) are joined by penetration, which takes place when contact surfaces (12, 14) of the joining tools (11, 13) are brought together, of tamped edges into the plastic structure (1, 25, 31, 37), in such a manner that a permanent, positive and non-positive connection (34) is formed.

Abstract: The invention relates to a process for producing a composite component from a plastic structure (1, 25, 31, 37) and a metal body (4, 25, 35, 40) by bringing together joining tools (11, 13). Plastic structure (1, 25, 31, 37) and metal body (4, 24, 35, 40) are joined by penetration, which takes place when contact surfaces (12, 14) of the joining tools (11, 13) are brought together, of stamped edges into the plastic structure (1, 25, 31, 37), in such a manner that a permanent, positive and non-positive connection (34) is formed. The composite components obtained have a high strength and rigidity combined with a low weight.

Abstract: The invention relates to a composite component and to a process for its production. The composite component is composed of a hollow-profile base (1), which has a hollow-profile cross section and is advantageously produced by the HF process, and of at least one plastic element (2) which has been securely connected to the hollow-profile base (1). The plastic element (2) has been molded onto the hollow-profile base (1) and its connection to the hollow-profile base (1) takes place at discrete connection sites (3, 6) by partial or complete jacketing of the hollow-profile base (1) at the connection sites (3, 6, 6a, 6b, 10, 12) by the molded-on plastic for the plastic element (2).