What causes the paint to peel only in the worn areas? Film thickness and the hardness of the curing.
The areas where hands touch and where parts come into contact are the only places where the paint is peeling off. This explains the points to reconsider regarding the hardness of the paint film, which is determined not only by the type of paint but also by the film thickness and curing.
The paint is peeling off only in areas that rub against handles and contact surfaces, exposing the base material. While the overall condition is fine, isn't it true that those specific areas have been repaired multiple times? 【First, please look here】 □ Pressing with a nail leaves a mark → Insufficient curing has resulted in a soft paint film □ The paint film in the peeled areas is thin → Insufficient film thickness at corners and edges □ The base coat peels off → Possible adhesion failure due to pre-treatment 【Why does this happen?】 The resistance to abrasion is determined not only by the type of paint but also by how hard the paint film has become through curing. Conditions such as insufficient oven temperature or the parts not reaching the required temperature due to thickness can result in the paint film being shipped while still soft. General-purpose paints may not be suitable for applications where abrasion is continuous. 【Countermeasures you can implement starting today】 1. Measure the film thickness in the rubbing areas and compare it to the target value 2. Check the curing time at the actual temperature of the parts 3. For areas where abrasion cannot be avoided, consider using abrasion-resistant paint 【Free materials】 The management standards for film thickness and curing are summarized in "Eiwa Kogei_Paint Quality Control Guidelines_Process Management Standards."
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Subject: Powder-coated products such as iron, stainless steel, and aluminum / Verification items: Film thickness by part, actual temperature of parts and curing time, adhesion.
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Measures to address paint peeling at areas such as handles, contact surfaces, and sliding parts, and training on curing management.
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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.
