Surface preparation
We verify the preparation grade to ISO 8501-1, residual salt contamination to ISO 8502 and the anchor profile roughness to ISO 8503. Those three parameters decide whether the coating holds or lets go in two years.
What welding leaves for the paint
Spatter, undercut, sharp edges and slag residue are welding defects that do not show until the part is painted. ISO 8501-3 classifies them into preparation grades P1, P2 and P3, and in EXC3 structural work a rounded edge is not optional. We come from welding, so we catch them before they reach the spray booth.
Application conditions
We record ambient temperature, substrate temperature, relative humidity and dew point before and during application. If the substrate is not at least 3 °C above the dew point, whatever goes on top of it is already doomed.
Film thickness and continuity
We measure wet and dry film thickness to ISO 2808, apply the acceptance criteria of ISO 19840 where relevant, and check the continuity of the coating.
Protection system to ISO 12944
We check that the specified system matches the corrosivity category of the environment and the durability required, and that what was actually applied matches what was specified. In petrochemical and marine environments that usually means C5.