A Preface
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ISO 9717-2017 Phosphate conversion films for metals – Method for determining requirements

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This document has been prepared by Technical Committee ISO/TC 107, Metallic and other Inorganic Coatings, Subcommittee SC 8, Chemically Transformed Coatings.

The third edition to cancel and replace the technically revised second edition (ISO 9717:2010). The following changes were made:

– scope has clearly;

— Normative references have been updated;

– Terms and definitions have been replaced by references to ISO 2080;

– Article 4 has been amended;

– The terms in clause 5 have been amended;

– The requirements of phosphate layer have been modified;

– The statement on corrosion resistance has been moved to the new Annex A;

– Annex B on salt spray tests has been amended;

— Annex C on properties of phosphate layers has been revised.

ISO 9717-2017 Phosphate conversion films for metals – Method for determining requirements

Introduction
Phosphate conversion coatings are applied to ferrous metals, aluminum, zinc and their alloys (including galvanized and zinc-alloyed steel, cadmium and their alloys) as end faces or as interlayers for other coatings. They are designed to

— Imparts corrosion resistance,

– Improves adhesion to paints and other organic finishes,

– promote cold forming operation, such as drawing, tubing, and extrusion, as well

– Modification of surface friction properties to facilitate sliding.

Phosphate conversion coating is produced by solution treatment, its main composition is proper orthophosphoric acid dihydrogen salt. These coatings are mainly applied to ferrous materials and zinc, and the coating quality and apparent density per unit area vary depending on

– component of building materials and surface condition,

– prior to mechanical and chemical processing of parts, as well

– phosphating treatment conditions.

More or less all phosphate conversion coating is porous, but can be by subsequent sealant for which the material sealing process.

ISO 9717-2017 Phosphate conversion films for metals – Method for determining requirements

Warning requires the use of the file if you don’t take appropriate safety measures may be harmful to the health of the material and/or procedures. This document does not address any health hazards, safety or environmental issues associated with its use. Producers and buyers of this document and/or the user has the responsibility to establish appropriate health, safety and environmental acceptable practices, and to take appropriate action.

1 Scope
This document sets out the process for confirming requirements for phosphate coatings, which are commonly used for ferrous materials, zinc, cadmium and their alloys (see Annex B).

2 Normative references

The following documents are referred to normatively in whole or in part in this document and are required for their application. For dated references, only the cited version applies. For undated references, the new version of the reference (including any revisions) applies.

ISO 2080, Metals and other inorganic coatings — Surface treatments, metals and other inorganic coatings — Vocabulary

ISO 3892, conversion coatings on metallic materials-determination of coating mass per unit area-gravimetric method

ISO 4519, electroplating metal coating and related facing – according to the property inspection sampling procedure

ISO 9227, artificial atmospheric corrosion test, salt fog test

ISO 9717-2017 Phosphate conversion films for metals – Method for determining requirements

3 Terms and definitions
For the purpose of this document, given in the ISO 2080 terms and definitions apply.

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