The present invention relates to a corrosion-protection system suitable for producing aqueous metal treatment and metal processing fluids, particularly corrosion-protection, cleaning and cooling lubricant emulsions. The corrosion-protection system comprises carbonic and/or phosphonic acids, as well as at least one amine with at least one oxybis(alkylamine) unit. Such corrosion-protection systems effectively protect metal surfaces from corrosion and have a high level of water solubility, which is essential for formulating aqueous concentrates for metal treatment and metal processing fluids. The present invention further relates to an aqueous surface-active and corrosion-protecting preparation containing the corrosion protection system and an emulsifier system, as well as an oil-containing water-miscible emulsion concentrate, which supplies the ready-to-use corrosion-protection, cleaning and cooling lubricant emulsions by dilution with water.