ISO 10601-2007 “Paint for mica iron oxide pigments specifications and test methods”

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ISO 10601 was developed by Technical Committee ISO/TC 35, Paints and Varnishes, Subcommittee SC 2, Pigments and Fillers.

The second edition cancelled and replaced the technically revised first edition (ISO 10601:1993).

ISO 10601-2007 “Paint for mica iron oxide pigments specifications and test methods”

The main technological changes are:

a) The grade description has been changed to remove the “non-layered” grade;

b) The requirements for residue on the sieve have been changed.

Mica iron oxide pigments were previously included in ISO 1248 (classified as “gray, metallic luster”), but were explicitly excluded in a revision published in 2006. In the revised version of ISO 10601, the requirements for mica iron oxide pigments are more clearly defined and relate to essentially layered particle shapes.

Mica iron oxide pigments vary in composition, size range and particle shape, depending on whether they are produced synthetically or refined as natural oxides, depending on where the ore is mined.

The main use of mica iron oxide is the protective coating of steel structure, in order to obtain better performance, the pigment should have a high content of thin flake particles. Protection is attributed to the tight packing of pigment flakes within the paint film, forming overlapping layers roughly parallel to the substrate. This prevents penetration of the corrosion promoter, reduces UV degradation of the adhesive, and improves film strength. For less important requirements, mica iron oxide pigments with lower flake content may be acceptable. Therefore, in this standard, mica ferric oxide pigments are divided into two groups based on sheet content determined by microscopic examination (see Table 1).

For the purposes of this standard, pigments containing less than 50% lamellar particles are not considered “mica” or classified as “lamellar”.

1 range
This standard specifies the requirements and corresponding test methods for dry artificial and natural mica ferric oxide (MIO) pigments used primarily as protective coatings for steel structures.

In accordance with current practice, the general requirements for mica iron oxide pigments have been subdivided

a) Those required requirements (see Table 2)

b) Requirements conditional on prior agreement between interested parties (see Table 3).

In some cases, agreed reference pigments may be used.

2 Normative references
The following references are required for the use of this document. For dated references, citation-only versions apply. For undated references, the new version of the reference (including any revisions) applies.

ISO 150, raw, refined and cooked flaxseed oils for paints and varnishes — Specification and test methods

ISO 787-2, General test methods for pigments and fillers – Part 2: Determination of volatiles at 105°C

ISO 787-3, General test methods for pigments and fillers – Part 3: Determination of water-soluble substances – Thermal extraction method

ISO 787-5, General test methods for pigments and fillers – Part 5: Determination of oil absorption values

ISO 787-9, General test methods for pigments and fillers – Part 9: Determination of the pH value of aqueous suspensions

– ISO 1248, iron oxide pigments – Specifications and test methods

– ISO 3549, zinc powder pigments for paints – Specifications and test methods

ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling

ISO 10601-2007 “Paint for mica iron oxide pigments specifications and test methods”

3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.

3.1 Mica iron oxide pigment

Refined mineral (also known as specular hematite) or a finished product consisting primarily of iron oxide (III) Fe2O3, having a gray, metallic luster and consisting primarily of particles having a layered form

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