ISO/DIS 9717-2016 pdf download.Metallic and other inorganic coatings – Phosphate conversion coating of metals.
ISO/DIS 9717 specifies a process for the determination of requirements for phosphate coatings which are basically destined for application on ferrous material, aluminium, zinc, cadmium and there alloys (see Annex A).
2 NormatIve references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2080. Metallic and other inorganic coatings — Surface treatment, metallic and other inorganic coatings — Vocabukuy
ISO 3892. Conversion coatings on metallic materials — Determination of coating mass per unit area — Gravimetric methods
ISO 4519, Electrodeposited metallic coatings and related finishes — Sampling procedures for inspection by attributes
ISO 9227. Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2080 apply.
4 Information to be supplied by the purchaser to the processor
The following information shall be given by the customer:
a) description of coating
b) in case of phosphating steel parts with a strength class 10.9/10, the safety against brittle fracture (hydrogen embnttlement) is of primary importance. The phosphatising process must be carried out in such a manner that that any damage because of hydrogen induced brittleness is excluded. Technical measures to minimise the risk of hydrogen induced brittleness have to be defined by the user respectively by the customer;
c) the sampling procedure, the acceptable quality limit or any other requirement and test whenever they deviate from Iso 4519;
d) the surface treatment or phosphating
e) the appearance of the surface;
1) the corrosion resistance;
g) the quality, appearance and condition of base metal, if any of these properties affect the usability and br appearance of coatings.
Heat treatment in accordance with the recommendations cannot guarantee full freedom from hydrogen embrittlement. Inspection procedures should be set whenever possible.
5 Coating types and their importance
5.1 Coating types
The conversion coating shall be declared according to Table 1.
There are other coating types of zinc phosphate, which are altered because of the build-in of iron and/or nickel and /or manganese. This altered metal is usually present as a double salt, like Zn2ME(P04)2 x 4 H20, whereby ME can be Fe(lI), Ni or Mn. Zinc will continue to be the main metal part of those coatings, which do not have an own marking to avoid confusion. It should also be noted that metal taken from the basic material, is Included in the conversion coating
5.2 Designation of conversion coating
The designation of the conversion coating shall consist of the following information:
a) number of this standard;
b) followed by a hyphen;
c) designation of basic material; by means of the material chemical symbol (or the symbol of the primary alloy components) (see Note 1);
d) followed by a solidus(/);
e) a symbol describing the type of coating.ISO/DIS 9717 pdf download.