The degreasing process, which is often overlooked in pinhole prevention measures, will be explained in terms of how residual oil can lead to a decline in quality.
If pinholes do not decrease, the cause may lie in the degreasing process rather than the paint or film thickness. Cutting oils and press oils are difficult to confirm visually and can volatilize during the baking process, creating bubbles within the paint film. Residual oil not only leads to pinholes but also serves as an entry point for complex defects such as poor adhesion, blisters, and paint peeling. Managing the temperature, concentration, and replacement timing of the degreasing solution contributes to quality stability.
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Metal coating defect measures, pretreatment management, adhesion failure, pinholes, blisters, quality improvement.
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Improvement of painting defects in automotive parts, construction hardware, and metal products, and review of the pretreatment process.
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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.
