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ISO

ISO/TR 15922:2011

(Main)

Metallic and other inorganic coatings — Evaluation of properties of dark-stain phenomenon of chromated coiled or sheet product

Metallic and other inorganic coatings — Evaluation of properties of dark-stain phenomenon of chromated coiled or sheet product

ISO/TR 15922:2011 describes the methods to evaluate the properties of dark-stain phenomenon observed in chromate conversion-coated coiled and sheet products. Chromate conversion coatings, with trivalent or hexavalent chromium ions, are applied to hot-dip metallic zinc and electroplated-zinc steel products to enhance corrosion resistance of the components. When zinc-coated packed coiled and sheet products with conversion coatings are unpacked after long-term storage at elevated temperature and high relative humidity, the surface of the sheet products appears tarnished. This discolouration appears as dark or black stain and influences the appearance and corrosion resistance, when parts are produced using these affected sheets.

Revêtements métalliques et autres revêtements inorganiques — Évaluation des propriétés du phénomène de tache foncée des produits chromés enroulés ou en tôle d'acier

General Information

Status
Published
Publication Date
04-Dec-2011
ICS
25.220.40 - Metallic coatings
Technical Committee
ISO/TC 107/SC 8 - Chemical conversion coatings
Drafting Committee
ISO/TC 107/SC 8 - Chemical conversion coatings
Current Stage
6060 - International Standard published
Start Date
15-Dec-2011
Completion Date
05-Dec-2011
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ISO/TR 15922:2011 - Metallic and other inorganic coatings -- Evaluation of properties of dark-stain phenomenon of chromated coiled or sheet productISO/TR 15922:2011 - Metallic and other inorganic coatings -- Evaluation of properties of dark-stain phenomenon of chromated coiled or sheet product
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ISO/TR 15922:2011 - Metallic and other inorganic coatings -- Evaluation of properties of dark-stain phenomenon of chromated coiled or sheet product
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