ASTM D1654 Méthode d’essai standard pour l’évaluation des éprouvettes peintes ou revêtues

Qu’est-ce que la norme ASTM D1654 ?  Méthode d’essai normalisée pour l’évaluation d’éprouvettes peintes ou revêtues soumises à des environnements corrosifs1

8. Procedure A—Evaluation of Rust Creepage for Scribed Specimens
8.1 Rinse each specimen after completion of the exposure period, using a gentle stream of water at a temperature up to 45 °C (110 °F). Enlever le revêtement le long de la ligne de traçage avec l’une des méthodes suivantes de manière à ce que toute la corrosion du substrat (c’est-à-dire la rouille, la fuite ou la contre-dépouille) puisse être observée à l’aide de l’une des méthodes suivantes.
8.1.1 Method 1 (Scraping)—Scrape the specimen vigorously with and instrument described in 5.3.1.
8.1.2 Method 2 (Knife)-Pick off the loose or lifted coating with a knife described in 5.3.2.
8.1.3 Method 3 (Paint Stripper)—Soak the panels in paint stripper or suitable solvent as described in 5.3.3 until the coating around the scribe is removed, or can be removed with a spatula.
8.1.4 Method 4 (Air Blow-Of)—Holding the nozzle, as described in 5.3.4, at approximately a 45° angle, blow along the entire scribe line, disturbing the surface adjacent to the scribe adjacent to the scribe mechanically by the air nozzle to ensure an opening for the air blast.
8.1.5 Method 5 (Power Washer)—Using a power washer described in 5.3.5, remove the coating around the scribe.
8.1.6 Other methods can be used to remove loose material around the scribe if agreed upon between purchaser and seller.

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