Pinhole defects that are likely to occur in die casting and casting. This explains the relationship between internal gas and pre-treatment.
A pinhole is a defect that occurs when small holes appear on the surface of a coating. In die casting and casting, it occurs when gas trapped inside the material expands during baking and breaks through the coating. When residual gas loses its escape route at around 180 degrees Celsius, it can lead not only to appearance defects but also to a decrease in rust prevention performance. The presence of oil and moisture can also cause similar issues, so reviewing preheating and drying conditions is effective.
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basic information
Metal coating defect measures, pretreatment management, adhesion failure, pinholes, blisters, quality improvement.
Price range
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Applications/Examples of results
Improvement of painting defects in automotive parts, construction hardware, and metal products, and review of the pretreatment process.
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.
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