With this, most gas and oil industries make use of pipes that are CRA lined to make the pipes suitable for use even when subjected to corrosive environments. Coating Failures and Defects. thinners as recommended by the paint supplier. Painting under extremely hot conditions or cool, damp conditions, which causes the paint film to dry faster on top than on the bottom. I made sure I'm painting on a good warm day, upper 70s to 80 degrees, with not much humidity. Wrinkling is usually caused by high carbon dioxide and sulfur content. Paint defects can have many causes. Chemical action of alkalis is the cause of this defect. 3. POSSIBLE CAUSES. However, a quality paintshop today cannot afford to produce flawed paintwork. When you see your paint having this type of reaction, you need to stop. Crazing Fig. Saponification Defect of Paint 10. Wrinkling. THK_Paint Defects_InGB.fh9 04.10.2005 10:08 Uhr Seite 1 C M Y CM MY CY CMY K Paint defects – inevitable but manageable. Formation of soap patches on the painted surface is termed as saponification. 3] Swelling of solvent-sensitive substrates. Applying too much paint or drying during high temperatures or painting on a topcoat before the undercoat is dry can cause this defect to happen. This is a common contamination paint defect. Eliminating a defect is often troublesome and time-consuming. It is unusual to have such severe wrinkling in paint containing lead-based pigments, which are known to aid the drying of paint … I've sanded it down nice and smooth, cleaned it furiously, wiped it with alcohol, and still it wrinkles. Paint applied too heavily. It is also possible, This is called biting, wherein a paint is moving away from a certain area causing a crater. www.harperpainting.com/wrinkling-paint-common-defect-in-paint Wrinkling Defect of Paint Sagging Defect of Paint 9. This type of defect is more prominent when a thick layer of paint is applied on a horizontal surface. 1. Despite careful preparation, advanced application methods and the use of high-grade paint systems, flaws in a vehicle refinish can never be entirely excluded. A comprehensive survey of the causes and characteristics of paint film defects, including wrinkling, can be found in M. Hess, 'Paint Film Defects: Their Causes and Cure', London, 1951. About 10 seconds after I spray it the paint starts to wrinkle in the same spot. Ensure … 16 Similar to checking but the cracks are generally wider and penetrate deeper into the film. In this defect paint drips downwards on the surface due to application of too thick or wet layer of paint. ... Wrinkling. 4] Incorrect quantity of hardener in Body-Filler or Filler coats. Saponification. Paint Defects Advice Swelling Causes 1] Drying time too short between layers in a complete process and/ or too high a film thickness of the filler coat within the process. 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