The terminology used in ISO 16276-1 to cover both failure types. 2. Key Aspects of the ISO 16276-1 Standard Equipment Requirements
Requires a with specified calibration.
: Tensile fracture strength of protective paint systems.
ISO 16276-1:2007 (and the updated 2025 version) specifies procedures for assessing the (adhesion and cohesion) of protective paint coatings on steel structures using the pull-off testing method . 🛠️ Scope and Application Material : Protective paint coatings on steel substrates . pdf iso -16276-1
Cut down through the coating around the circumference of the dolly using the specialized cutting tool. This step is critical as it isolates the specific test area from the surrounding paint matrix. 5. Applying Tensile Force
The most critical change is the reduction of the minimum steel substrate thickness from 10 mm to 3 mm, which greatly expands the standard's applicability to modern lightweight steel structures in the automotive, architectural, and renewable energy sectors.
: A circular cutter used to isolate the dolly by cutting through the paint down to the substrate. Step-by-Step Test Procedure The terminology used in ISO 16276-1 to cover
The standard emphasises that test locations must be representative of conditions—e.g., near cut edges, where thickness is lowest, or areas with suspected over-coating of contaminants.
Many novices skip this step. This isolates the test area so you are not pulling a larger area than the dolly diameter.
ISO 16276-1:2025 is the authoritative, globally recognized standard for the pull-off adhesion testing of protective coatings on steel, essential for quality assurance, acceptance testing, and in-service inspections. The latest 2025 edition is a major step forward, expanding the standard's applicability to a much wider range of modern steel structures by reducing the minimum substrate thickness to 3 mm. : Tensile fracture strength of protective paint systems
: Minimum of 10 mm (thinner substrates require reinforcement using the "sandwich technique" per ISO 4624).
Because of these copyright restrictions, the full text cannot be legally provided here. However, you can access the standard through the following official channels: Official Access Points
The inspector notes the maximum force (in Megapascals, MPa, or Pounds per Square Inch, PSI) at which the failure occurred. Interpreting Failure Modes
You might also find a (Paints and varnishes — Pull-off test). This causes confusion.