Applicable for both on-site inspections and laboratory settings.
| Code | Description | |------|-------------| | A | Adhesive failure – coating/substrate | | B | Cohesive failure – within coating | | C | Glue failure – dolly/adhesive interface | | D | Combined failure |
The standard requires you to look at the face of the dolly and the substrate to determine where the break occurred: Adhesive Failure
Internal failure completely within the first primer coat layer. Adhesion Failure pdf iso -16276-1
Note: Free copies found on open document sharing networks often contain incomplete drafts or formatting errors, which can compromise compliance audits. Always use verified PDF sources containing valid digital rights management (DRM) features.
If the coating fails adhesively at the steel at, say, 8 MPa, it still fails acceptance—even though the numerical value is high. Corrosion will initiate at those bare spots.
A break within a single layer of the coating material itself, or within the steel substrate. Always use verified PDF sources containing valid digital
The PDF format was first introduced in 1993 by Adobe Systems, and since then, it has undergone several revisions and updates. In 2008, Adobe Systems released PDF 1.7, which became the basis for the ISO 16276-1 standard. The ISO 16276-1 standard was published in 2015, providing a formal specification for PDF 1.7, including its compression and encoding methods.
If you specify or perform adhesion testing on structural steel coatings without referencing ISO 16276-1 (or an equivalent like NORSOK M-501’s pull-off criteria), you are missing half the story. The coating that passes at 7 MPa with glue failure is a waste of money. The coating that passes at 4 MPa with cohesive failure in the mid-coat might give 15 years of service.
Testing offshore rigs, pipelines, and storage tanks. A break within a single layer of the
It applies to:
Focuses heavily on on-site, in-situ applications rather than just laboratory environments. The Core Methodology: Pull-Off Testing