August 20 - August 26, 2012
How long after blasting can stainless steel be left before painting? If this time is exceeded, what further surface preparation is required?
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Daniel Liu of APC on
February 6, 2013:
No special guideline prescribes such a time window. It can be left there as long as no obvious discoloration is observed. I believe the main purpose for blasting is to obtain the specified profile for the coating application. Thanks.
Ahmed Abd Ellatif of bv on
February 28, 2013:
Painting can br delayed 2 to 4 hours, depending on relative humidity.If it is high, the surface will be affected. We will find shadows, which then require reblasting.
Greg Howe of LPRI, LLC on
February 8, 2013:
Follow the product data sheet for the specified coating. This will give you profile and cleanliness requirements. Typically, SSPC-SP 1, solvent cleaning, is required to remove contaminants prior to coating.
Tom Schwerdt of Texas Department of Transportation on
August 30, 2012:
Stainless steel should typically be re-passivated after blasting. After that, it can be left as long as the surface isn't contaminated.
anthony meglino1 of asap on
August 21, 2012:
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It can be left less than 24 hours.
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