Insufficient cleaning is the cause of all painting defects and the truth behind recontamination.
The peeling paint and pinholes are not decreasing. The cause may not be due to degreasing, but rather residual chemicals from insufficient cleaning or recontamination.
The cleaning process is a crucial step that removes residual chemicals and fine dirt left after degreasing. However, in practice, there are many cases where it is judged that "there is no problem because we are rinsing with water." In reality, insufficient cleaning can lead to the residual chemical components remaining on the material's surface, which can vaporize during curing, resulting in pinholes or paint film lifting. This is particularly likely to occur with complex-shaped parts, where defects due to liquid pooling can easily arise. This is actually a point that is often overlooked. There are cases where the cleaning water itself is contaminated. Furthermore, in some cases, the final rinse water is managed based on a conductivity standard of 50 microsiemens per centimeter or less. Deterioration of water quality can lead to adhesion failures or whitening phenomena. A common misunderstanding in the field is the belief that "as long as degreasing is done, there is no problem." By reviewing the cleaning conditions, there are many cases where the defect rate can be improved. Actual improvement cases are also detailed in publicly available materials.
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Metal surface preparation before painting
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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.
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