ISO 9717-2024 PDF

Full title and description

St ISO 9717-2024 — Metallic and other inorganic coatings — Phosphate conversion coating of metals. This international standard specifies requirements and designation conventions for phosphate (phosphating) conversion coatings typically applied to ferrous materials, aluminium, zinc, cadmium and their alloys, and provides guidance for procurement, production control and conformity assessment of phosphating treatments.

Abstract

This document defines the requirements for phosphate conversion coatings — their designation, appearance, coating mass (area-related mass), post‑treatments and assessment methods — where such coatings are intended to provide adhesion promotion, corrosion protection, friction control or other surface functions. It includes normative and informative guidance on testing (e.g., neutral salt spray) and measures to minimise hydrogen embrittlement on high‑strength steels.

General information

• Status: Published.
• Publication date: 10 July 2024.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.220.20 (Surface treatment; metallic and other inorganic coatings).
• Edition / version: 4 (ISO 9717:2024).
• Number of pages: 13.

Key bibliographic and status details above are taken from the ISO bibliographic record for ISO 9717:2024.

Scope

This standard specifies the requirements for phosphate conversion coatings that are usually destined for application on ferrous materials, aluminium, zinc, cadmium and their alloys (see Annex B of the standard). It is intended to be used when specifying phosphating treatments in procurement documents and for production and conformity assessments of conversion coatings.

Key topics and requirements

• Coating types and designation format (identification of base metal, phosphate type such as iron, manganese, zinc, zinc‑calcium, intended function codes and target area‑related mass).
• Information the purchaser must supply (coating designation, required appearance, corrosion resistance or performance tests, sampling and acceptance criteria).
• Requirements for coating appearance and uniform coverage; measurement of coating mass per unit area (gravimetric methods referenced to ISO 3892).
• Post‑treatments and finishes (seals, oils, varnishes, dyes) and their effect on performance and corrosion resistance.
• Corrosion‑resistance assessment methods (e.g., neutral salt spray testing in accordance with ISO 9227 where specified) and guidance on representative test specimens and procedures.
• Measures to reduce the risk of hydrogen embrittlement on high‑strength steels, and references to post‑coating treatments to mitigate embrittlement (see ISO 9588/ISO 9587 guidance).
• Sampling, inspection and acceptance procedures (sampling by attributes and inspection plans) and references for thickness/mass correlation and measurement methods (magnetic, chemical dissolution, X‑ray techniques per related ISO test methods).

Technical topics and measurement/test references are consistent with the standard's normative references and guidance.

Typical use and users

Used by surface‑treatment processors, pretreatment laboratories, coatings and corrosion engineers, OEM procurement/specification teams, quality and compliance personnel, and industries that require controlled phosphating for adhesion, corrosion protection or functional surface properties (automotive, aerospace, metalworking, construction and fasteners supply chains). It is commonly used to set procurement requirements, production control criteria and acceptance testing procedures.

Related standards

Normative and commonly referenced documents include (examples): ISO 2080 (vocabulary for metallic and other inorganic coatings), ISO 3892 (determination of coating mass per unit area — gravimetric), ISO 4519 (sampling procedures for inspection), ISO 9227 (salt spray tests), ISO 9588 / ISO 9587 (post‑coating and pretreatment measures to reduce hydrogen embrittlement), and measurement/test standards such as ISO 2177, ISO 2178 and ISO 3497 for thickness/measurement correlations. These referenced standards provide terminology, test methods and related controls used alongside ISO 9717.

Keywords

Phosphate conversion coating; phosphating; conversion coating; metallic coatings; surface treatment; coating mass; salt spray; corrosion resistance; hydrogen embrittlement; post‑treatment; ISO 9717.

FAQ

Q: What is this standard?

A: ISO 9717:2024 specifies requirements and designation conventions for phosphate conversion (phosphating) coatings applied to metals to provide adhesion promotion, corrosion protection and other surface functions.

Q: What does it cover?

A: It covers coating types and designation, purchaser information requirements, appearance and coating mass criteria, post‑treatments, test and inspection methods (including corrosion testing where specified), and measures related to hydrogen embrittlement mitigation.

Q: Who typically uses it?

A: Surface‑treatment shops, pretreatment and testing laboratories, coatings and corrosion engineers, OEMs and procurement/specification teams, and quality/compliance staff in industries such as automotive, aerospace, construction and general metal fabrication.

Q: Is it current or superseded?

A: Current — ISO 9717:2024 is the latest published edition (published 10 July 2024) and replaces the previous edition ISO 9717:2017.

Q: Is it part of a series?

A: It is part of the family of ISO standards on metallic and other inorganic coatings maintained by ISO/TC 107/SC 8 and commonly used alongside related test and vocabulary standards (for example ISO 2080, ISO 3892, ISO 9227 and ISO 9588).

Q: What are the key keywords?

A: Phosphate conversion, phosphating, conversion coating, coating mass, corrosion resistance, salt spray, hydrogen embrittlement, surface treatment, ISO 9717.