Method and solution for coating metal surfaces with a posphating solution containing water peroxide, produced metal object and use of said object

A process for the treatment or pretreatment of surfaces of metallic objects with an acidic, aqueous solution containing zinc and phosphate, wherein the phosphating solution contains

• 0.1 to 10 g/l of zinc,
• 4 to 50 g/l of phosphate, calculated as PO4,
• 0.03 to 3 g/l of at least one guanidine compound which contains at least one nitro group, calculated as nitroguanidine, and
• 0.001 to 0.9 g/l of hydrogen peroxide
• and has a temperature of less than 80° C., wherein in a first step no calcium or magnesium are intenionally added.

An acidic aqueous solution comprising.

• 0.l to 10 g/l of zinc,
• 4 to 50 g/l of phosphate, calculated as PO4,
• 0.03 to 3 g/l of at least one guanidine compound which contains at least one nitro group, calculated as nitroguanidine,
• and 0.001 to 0.9 g/l of hydrogen peroxide.