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

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

12-05-2011

Publisher

International Organization for Standardization

Preview

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.

DocumentType	Technical Report
Pages	9
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
NEN NPR ISO/TR 15922 : 2012	Identical

IEC 60068-3-6:2001	Environmental testing - Part 3-6: Supporting documentation and guidance - Confirmation of the performance of temperature/humidity chambers
ISO 2859:1974	Sampling procedures and tables for inspection by attributes
ISO 3892:2000	Conversion coatings on metallic materials Determination of coating mass per unit area Gravimetric methods
ASTM D 2244 : 2016 : REDLINE	Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
IEC 60068-3-5:2001	Environmental testing - Part 3-5: Supporting documentation and guidance - Confirmation of the performance of temperature chambers
ISO 4519:1980	Electrodeposited metallic coatings and related finishes — Sampling procedures for inspection by attributes
ISO 3497:2000	Metallic coatings Measurement of coating thickness X-ray spectrometric methods
ISO 4520:1981	Chromate conversion coatings on electroplated zinc and cadmium coatings
ISO 6789:2003	Assembly tools for screws and nuts Hand torque tools Requirements and test methods for design conformance testing, quality conformance testing and recalibration procedure
ISO 3613:2010	Metallic and other inorganic coatings Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys Test methods
IEC 60068-2-30:2005	Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)