Importance

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Abstract

The present invention relates to a simplified process for the pretreatment of metallic substrates for cold forming, wherein a metallic substrate is successively 1) preferably cleaned and subsequently rinsed, 2) preferably pickled and subsequently rinsed, 3) brought into contact with a water-based, acidic, reactive lubricant comprising a) oxalic acid, b) at least one accelerator which comprises nitroguanidine and/or at least one iron(III) source and c) at least one film former, at least one wax and/or at least one emulsified lubricating oil and 4) is optionally dried, where the at least one film former is selected from the group consisting of homopolymers and copolymers of ethylene, propylene, styrene, (meth)acrylic acid, (meth)acrylate, vinylamine, vinylformamide, vinylpyrrolidone, vinylcaprolactam, vinyl acetate, vinylimidazole and/or epoxide and salts thereof and polyurethanes, polyamides, polyethylenimines, polyamines and salts thereof, where the at least one wax is selected from the group consisting of nonionic waxes and cationically stabilized waxes, and where the at least one emulsified lubricating oil is selected from the group consisting of synthetic oils, mineral oils, vegetable oils and animal oils, to a corresponding reactive lubricant and to a metallic substrate which has been pretreated by the process and the use thereof.

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First Claim