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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?


Selected Answers

From 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.

From Ahmed Abd Ellatif of MOPCO 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. 

From Greg Howe of Retired 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.

From 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.

From anthony meglino1 of asap on August 21, 2012:
It can be left less than 24 hours.

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Tagged categories: Coating Application; Paint application; Stainless steel; Surface preparation


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