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Preparation of steel substrates before application of paints and related products — Collected information on the effect of levels of water-soluble salt contamination
on steel surfaces, before the application of paint or related products to surfaces prepared in accordance with
standard mechanical or blast-cleaning surface preparation methods.
NOTE The tolerance for water-soluble salt contamination may be different for different paint types.
This information may be used when evaluating the adequacy of surface preparation prior to painting.
This document is concerned only with measured levels of salt contamination based upon either laboratory or field
testing. The levels of soluble chloride and sulfate discussed in this document are to be compared using soluble
surface densities of the species as determined after extraction in accordance with ISO 8502-6 (the Bresle method),
or other methods giving equivalent results. Total soluble-salt contamination may be determined by conductometric
testing, but such testing will not determine the nature and concentration of the specific salts present, e.g. whether
chloride or sulfate is present, or its concentration.
This document does not define specific levels of cleanliness or methods of salt removal.
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