What causes poor adhesion in metal baked coatings? This explains the key points for improving quality by reviewing the pretreatment process.
Poor adhesion in metal baked coatings can lead not only to paint peeling but also to the reoccurrence of blisters and rust, as well as a decrease in durability. Many of the causes lie not in the painting process but in the pretreatment process. Residual oil due to insufficient degreasing, inadequate formation of chemical conversion coatings, and moisture retention due to insufficient drying can prevent the coating film from adhering sufficiently to the metal surface. Furthermore, the necessary pretreatment varies by material, such as aluminum die-cast and zinc-coated steel sheets. Standardizing pretreatment conditions and numerical management are key to improving quality.
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Metallic baked coating, poor adhesion, pretreatment, degreasing, chemical conversion coating, quality improvement.
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Applications/Examples of results
Measures to address poor adhesion in automotive parts, home appliances, metal enclosures, and industrial machinery components.
Company information
We are not just a "subcontracted painting factory." Established in 1958, our company has a foundation of painting technology and also specializes in chemical treatment, stripping, and cleaning, functioning as the "external surface treatment department" in your organizational chart. Based on our philosophy of "preparation is eight-tenths of the work," we emphasize participation from the "upstream process" before the drawings are finalized. We conduct test painting on a wide range of metals and difficult materials, and we produce the entire process from assembly, packaging, to delivery, thereby reducing your management workload. Additionally, by being able to perform zinc phosphate treatment in-house, we achieve stable painting quality. Furthermore, our micro-heating stripping technology, which does not use chemicals, maintains the electrical state of the "jigs (hangers)" that influence painting quality. Our approach of "pre-treatment determines painting quality" ensures the stability of the paint film during mass production. Rather than simply "applying specified standards," we work backwards to achieve optimal painting specifications and prevent scratches during transportation, sparing no effort in thorough discussions from the outset. This diligent preparation is the shortest path to preventing rework and minimizing total costs. From the development stage, please utilize the expertise of our specialists as part of your production line.
