

Yea it seems like including Ni and Co as ‘ferrous’ materials is only done in certain industries/applications. From a pure chemistry point of view, only iron (Fe) is ferrous. [source: got bachelors in chem]. Also, as mentioned elsewhere, some people/industries [incorrectly] use the term ‘ferrous’ to mean magnetic, but the actual term is ‘ferromagnetic’. Lots of the old terminology (lots of latin) is still used even though we now know they are technically incorrect.
No link to a source in the article. I searched for it and found a CNBC article that posts a link to the “report” from the South Korean Data Protection Authority, but its a bad link. I dont read Korean so its difficult to search any further, but I found no evidence that the south korean authority made this claim.