BS EN ISO 9717:2017 Metallic and other inorganic coatings. Phosphate conversion coating of metals

BS EN ISO 9717:2017

Metallic and other inorganic coatings. Phosphate conversion coating of metals

Status : Current   Published : November 2017



What is this standard about?

It specifies requirements for how ferrous metals, aluminium, zinc, cadmium and their alloys should be processed to produce coatings that essentially consist of inorganic phosphates. These coatings will be used in conjunction with supplementary finishes to protect the basis metal against corrosion and to provide anti-wear properties to sliding surfaces; adhesion to organic finishes; and ease of cold forming operation.

Who is this standard for?

It’s relevant to anyone using phosphates as a substrate for coating with paints, typically in military and construction applications. The standard is also the basis of many OEM standards used in the automotive industry. 

Why should you use this standard?

It supplies coating weights and types of phosphates for given applications. 

It also provides the requirements for inorganic phosphate use in coatings to prevent corrosion, improve adhesion, modify surface friction and facilitate cold forming.

What’s changed since the last update?

The original standard included only one process although other processes are possible. This revision has removed the specified process. Also Clauses 4 and 5 have been revised, some annexes have been updated and a new annexe added on corrosion resistance. Specifically:

  • The scope has been clarified 
  • The normative references have been updated
  • The terms and definitions have been replaced by a reference to ISO 2080 
  • Clause 4 has been revised
  • The terms in Clause 5 have been revised
  • Requirements for the phosphate layer have been revised
  • Statements on corrosion resistance have been shifted to a new Annex A
  • Annex B on salt spray testing has been revised
  • Annex C to the properties of the phosphate layers has been revised

Standard NumberBS EN ISO 9717:2017
TitleMetallic and other inorganic coatings. Phosphate conversion coating of metals
Publication Date09 November 2017
Normative References(Required to achieve compliance to this standard)ISO 9227:2017, ISO 2080:2008, ISO 3892:2000, ISO 4519
Informative References(Provided for Information)ISO 10289:1999, ISO 2178:2016, ISO 10587:2000, ASTM E527 - 16, ISO 3497:2000, ASTM B117 - 16, ISO 4536:1985 (R11), ISO 27830:2008, ISO 2177:2003
ReplacesBS EN ISO 9717:2013
International RelationshipsEN ISO 9717:2017,ISO 9717:2017
Draft Superseded By16/30321230 DC
DescriptorsThickness, Adhesion, Phosphates, Classification systems, Designations, Aluminium, Corrosion protection, Conversion coating, Corrosion tests, Cadmium, Mass, Coatings, Surface treatment, Embrittlement, Protective coatings, Heat treatment, Zinc, Ferrous metals
Title in FrenchRevêtements métalliques et autres revêtements inorganiques. Couches de conversion au phosphate sur métaux
Title in GermanMetallische und andere anorganische Überzüge. Phosphatüberzüge auf Metallen
ISBN978 0 580 89763 4
File Size621 KB

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