95.99 Withdrawal of Standard Jan 10, 2017
ISO
ISO/TC 35/SC 12 Preparation of steel substrates before application of paints and related products
International Standard
25.220.10 Surface preparation
Withdrawn
ISO 8502-2:2005 describes a method for the determination of chloride-containing salts that are readily soluble in water and are present on a steel surface. The method is also applicable to previously coated surfaces. It will normally be used in a laboratory using washings sampled from surfaces on site.
ISO 8502-2:2005 is applicable to the determination of salts that have been deposited on the steel surface before, during or after the cleaning operations.
ISO 8502-2:2005 is not applicable to surfaces treated with chromate, nitrite or amine, which are commonly used as inhibitors in the water when wet blast-cleaning. This is because a chromate concentration of 10 mg/l or greater or a nitrite concentration of 20 mg/l or greater in the wash water interferes with the determination of the chloride. Also the amine inhibitors can form a hydroxide boundary layer (not water soluble) over the substrate and prevent the water from contacting the underlying salt for its removal. An iron(III) ion concentration of 10 mg/l also interferes with the determination, but the iron(III) ions are concentrated in the rust deposits, which are removed from the test solution by filtration.
WITHDRAWN
ISO 8502-2:1992
WITHDRAWN
ISO 8502-2:2005
95.99
Withdrawal of Standard
Jan 10, 2017
PUBLISHED
ISO 8502-2:2017