Adhesion properties of tartaric sulfuric acid anodic films assessed by a fast and quantitative peel tape adhesion test

The adhesion capabilities of sulfuric acid and tartaric-sulfuric-acid anodic oxide films on cladded AA2024-T3 aluminium substrates have been investigated in a quantitative manner. A relatively simple, versatile industrially applicable test methodology based DIN EN ISO 29862 has used. In addition, the effect anodising process parameters film morphology studied correlated with results. considered are chemistry acidic pickling pre-treatment step, addition tartaric to electrolyte, formation voltage, electrolyte temperature. suggested tape peel is able differentiate among pre-treatments conditions showing good correlation morphological features at ultimate surface. High strengths measured when topographies such as pore mouth widening dissolution-driven roughness take place. These morphologies typically found layers formed elevated temperatures. proposed method can be beneficial for fast assessment adhesion, which special interest industrial optimisation processes.