The 'pre-treatment' that determines 90% of coating quality and zinc phosphate coating.
Many of the painting defects are hidden in the previous processes. This explains the mechanisms of chemical treatment that influence the durability of automotive parts.
[Cause of Occurrence] In metal painting, attention tends to focus on "how to paint," but in reality, most of the quality is determined by the time the painting process begins. Neglecting pre-treatment can lead to simultaneous occurrences of various defects such as poor adhesion, rust, and blisters. [Truth] Even using excellent paint is meaningless without the "anchor effect" that firmly bonds the metal material and the paint film. To meet the harsh durability required for automotive parts, it is essential to form a uniform and dense zinc phosphate film (conversion coating) on the surface of the material. [Improvement Measures] It is important to regularly measure the total acidity, free acidity, and concentration of accelerators in the conversion treatment solution twice a day to control the size of the film crystals. A daily management manual for pre-treatment solutions that can be used immediately on-site can be downloaded from the button below. [Summary] The true foundation of painting is pre-treatment, and precise film management is the lifeline of high-durability automotive part painting. Eiwa Kogei Co., Ltd. thoroughly manages pre-treatments, including zinc phosphate coating, to achieve high-quality painting.
basic information
Pre-treatment process: Degreasing, acid cleaning, zinc phosphating / Coating thickness: 8-12 microns / Crystal diameter: 5-15 microns management / Coating thickness management accuracy: plus or minus 1 micron / Corrosion resistance 5-year warranty
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Applications/Examples of results
Automotive parts, metal products, industrial machinery
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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.