This standard specifies several chemical methods of passivation for corrosion resisting steels (austenitic, ferritic, martensitic and precipitation hardenable) and of decontamination for nickel base alloys.
DS/EN 2516:1997 history
1997DS/EN 2516:1997 Aerospace series - Passivation of corrosion resistant steels and decontamination of nickel base alloys