I would think all NATO ammo is non-corrosive but I have no source. I'm sure an ammo expert will be along shortly.
I looked at the manual I didn't find anything in there. it's pretty confusing.7.62mm NATO ammunition was standardized amongst all NATO signatory countries. One aspect of that standardization was non-corrosive primers. This facilitated use of any 7.62mm NATO ammo by any country. You can review TM 9-1305-200 for comments about the standardization. All standardized 7.62mm NATO ammo carries the NATO symbol which is not a cross but is actually a compass with four points.
Actually, white tip U.S. 7.62 NATO cartridges are not AP-I. AP-I is designated by a silver tip. The cartridge never progressed beyond the experimental stage and was designated XM101E1. White tip cartridges are Low Recoil cartridges. They too never progressed beyond the experimental stage. The bullet used in the Low Recoil cartridge was the 96 grain front bullet from the M198 Duplex cartridge.here is another interesting site.
So far it seems that the STANAG "circle cross/compass" just means that it will chamber and that it should shoot. however, they may be made from different components. Because of this it seems like they are probably none corrosive because of the times they were produced.
Note: If anyone would like to give me some white tipped surplus ammo I will gladly accept
They are Armor Piercing Incendiary