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How to validate protective coatings with adhesion and corrosion testing Protective coatings only deliver value if they stay bonded to the substrate and resist the environments they're exposed to. Whether you're coating bridge steel, automotive body panels, marine structures, or industrial components, two families of test give you the evidence you need: adhesion testing and…

Key terms Adhesion: The strength of the bond between a coating and its substrate.  Substrate: The surface a coating is applied to, such as metal, concrete, wood, or plastic.  Pull-off adhesion test: A quantitative test that measures the perpendicular force needed to detach a coating from its substrate, reported in MPa or psi.  Dolly: The…

Coating adhesion and corrosion testing are two complementary coating test and measurement methods used to confirm that a protective coating will perform once a product is in service. Together they answer two questions that matter to quality, R&D, and operations experts: will the coating stay attached to the substrate, and will it protect that substrate…

Key terms Chain scission. The breaking of long polymer molecules into shorter chains, reducing molecular weight. Driven by heat, shear, and oxidation during use and reprocessing.  Post-consumer recyclate (PCR). Material recovered from products that have completed their intended use and been collected from end users.  Post-industrial recyclate (PIR). Material recovered from manufacturing scrap, trim, or…

How to validate the performance of recycled and sustainable plastics Reprocessed polymers inherently differ from virgin materials, so validating their performance calls for a deliberate, standards-led approach. This explainer sets out why recycled plastics need their own testing strategy, which properties to measure, how the core test methods work, and how to build a defensible…

What is recycled and sustainable plastics testing? Recycled and sustainable plastics testing is the structured measurement of the mechanical, flow, and durability properties of polymers that contain recycled content, carried out so manufacturers can confirm the material performs as required for its end use. It is a core part of quality control and R&D for…

Key terms Impact testing  A test method measuring the energy a material absorbs when struck by a sudden, high rate force. Used to determine toughness, brittleness, and shock resistance.  Izod impact test  A pendulum based impact test where the specimen is clamped vertically with the notch facing the striker. Governed by ISO 180 and ASTM…

Overview Pendulum impact testing is the most widely used method for measuring a material's toughness. A weighted hammer is released from a known height, strikes a clamped specimen, and the energy absorbed at fracture is calculated from the height the pendulum rises to after impact. The result, expressed in joules, tells quality, R&D, and operations…

Definition of Impact testing Impact testing measures how much energy a material absorbs when struck by a sudden, high rate force. The energy absorbed at the point of fracture indicates the material's toughness, brittleness, and resistance to shock loading. Impact testing is a core requirement across plastics, polymers, composites, ceramics, and non ferrous metals, and…