This document specifies a process for the confirmation of requirements for phosphate coatings which are usually destined for application on ferrous materials, zinc, cadmium and their alloys (see Annex B).rd edition 2017-09 Metallic and other inorganic coatings — Phosphate conversion coating of metals Revêtements métalliques et autres revêtements inorganiques — Couches de conversion au phosphate sur métaux Reference number ISO 9717:2017(E) ？ ISO 2017 ISO 9717:2017(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO 2017, Published in Switzerland All rights reserved