TS EN 2757

TS EN 2757 is a test-method standard for primers used in aerospace structural adhesive systems, focused on determining drying residue and ignition residue. In practical terms, it addresses how the non-volatile portion of a primer is assessed, including information relevant to solid content and to corrosion-inhibitor content.

What drying residue and ignition residue mean

Drying residue refers to the material left after volatile components have been removed, and it is commonly understood as the solid content of the primer. Ignition residue is the remaining matter after burning the sample; in primer evaluation, this can provide indirect information about non-combustible constituents such as corrosion inhibitors or other inorganic components. The distinction matters because a primer’s performance depends not only on how much material is present, but also on what type of material remains after volatiles are driven off or the sample is ignited.

The method framework covered by this standard

• Method A covers determination of drying residue.
• Method B covers determination of residue after ignition.
• The standard sets general requirements for these determinations rather than defining the overall formulation or performance of a specific primer.

From a broader technical perspective, residue measurements are useful in quality control for coatings and adhesive-related materials. Solid content influences application behaviour, film build, and the amount of material that remains after processing, while ignition residue can help indicate the presence of fillers or corrosion-inhibiting constituents. TS EN 2757 provides a standardised test framework for these checks in aerospace applications.