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INSPECTION LOGBOOK
Coating Inspections - Inspection of Steel Surface Preparation, Part 6 Massimo Cornago NACE International Certified Coating Inspector, NACE CIP PEER Reviewer
cornago@ipcm.it
A
s mentioned in the previous article, we will now discuss the
to enhance the adhesion of the coating system to the substrate. Profile
surface profile testing methods used to check that a specified
measurement is key to comply with specifications, but also to ensure
surface profile has been attained. In fact, when protective coatings
that the blast cleaning process is controlled and it does not produce
need to be applied on structures, it is important that their surfaces
inadequate or excessive profile heights.
are clean and dry in order to prevent premature failure of the coating
Two ASTM standards dealing with surface profile assessment, namely
itself and guarantee a long service life. In many situations (for both
“D 4417-Standard Test Methods for Field Measurement of Surface
new build and repair of structures), blast cleaning of surfaces is
Profile of Blast Cleaned Steel” and “D 7127-Standard Test Method for
required to remove any contamination and create an anchor pattern
Measurement of Surface Roughness of Abrasive Blast Cleaned Metal
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N. 41 - 2022 APRIL - ipcm® Protective Coatings
