Pdf Iso -16276-1 ^new^ 🆓

The cohesive failure occurs entirely within the underlying steel substrate (rare). Adhesion Failure

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: If the glue fails before the paint, the test is invalid and must be repeated. Acceptance Criteria

: A specialized adhesive (often cyanoacrylate or epoxy) is used to glue the dolly to the coating. It must cure completely before testing. pdf iso -16276-1

The standard’s approach to pull-off testing references the test method described in , a well-established standard for pull-off adhesion testing. However, unlike ISO 4624 (which focuses solely on the test procedure), ISO 16276-1 includes three crucial additional components:

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ISO 16276-1 is primarily designed for of protective paint coatings on steel structures. The cohesive failure occurs entirely within the underlying

ISO 16276-1:2007 / Pull-off method

This makes ISO 16276-1 and contract compliance verification than ISO 4624 alone, which lacks these acceptance frameworks.

The procedure utilizes a portable, mechanical, or hydraulic pull-off adhesion tester. A metal test dolly (or stub) is glued directly to the surface of the dry cured paint film using a high-strength adhesive (typically a specialized epoxy or cyanoacrylate). Once cured, a tensile load is applied normal (perpendicular) to the test surface. The force is steadily increased at a controlled rate until the coating system detaches, or a pre-specified target force value is reached. 2. Substrate Requirements However, unlike ISO 4624 (which focuses solely on

A break at the interface between two distinct layers. For example, a failure between the steel substrate and the primer (A/B), or between the primer and the topcoat (B/C). This often points to poor surface preparation or incompatibility between paint layers.

The surface of the cured coating and the face of the test dolly must be thoroughly cleaned and degreased. Lightly abrading the dolly face with sandpaper improves mechanical bonding with the adhesive. Step 2: Applying the Adhesive

The longevity of any anti-corrosive coating depends entirely on its mechanical bond with the underlying steel substrate. While the widely recognized ISO 12944 series establishes general guidelines for designing protective paint systems, it lacks comprehensive field testing workflows and precise pass/fail limits for field applications. ISO 16276-1 explicitly supplements ISO 12944 by providing: