Norm

NPR-ISO/TR 15922:2011 en

Metallieke en andere niet-organische deklagen - Beoordeling ten aanzien van donkere vlekken op gechromateerde band of plaat producten

  • Deze norm is ingetrokken sinds 25-01-2012

52,53

Over deze norm

Status Ingetrokken
Aantal pagina's 9
Commissie Metallieke deklagen
Gepubliceerd op 01-12-2011
Taal Engels
This Technical Report 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 (RH), 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.

Details

ICS-code 25.220.40
Nederlandse titel Metallieke en andere niet-organische deklagen - Beoordeling ten aanzien van donkere vlekken op gechromateerde band of plaat producten
Engelse titel Metallic and other inorganic coatings - Evaluation of properties of dark-stain phenomenon of chromated coiled or sheet product

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