Definition of parkerized in US English:

parkerized

adjective

  • (of iron or steel) treated for rustproofing by brief immersion in a hot acidic solution of a metal phosphate.

    ‘in the factory, bolts were parkerized’

Origin

1920s: from parkerizing, a proprietary term in the US.

Pronunciation

parkerized

/ˈpärkəˌrīzd//ˈpɑrkəˌraɪzd/