The increase in peeling from autumn to winter is due to the drop in temperature of the degreasing solution, which prevents the oil from being completely removed. This explains the management points for reviewing pretreatment during the change of seasons.
In summer, there were no issues, but since it has gotten colder, the peeling has increased. Even though neither the paint nor the application method has changed, why is this happening? 【First, please take a look here】 □ Parts processed first thing in the morning tend to peel more → The degreasing solution cools overnight and hasn’t fully warmed up □ Only parts with a lot of oil are peeling → The liquid temperature has dropped, weakening its ability to remove oil □ When water is applied, it beads up → This is a sign that oil remains on the surface 【Why does this happen?】 The degreasing solution only exhibits its true power at a specified temperature. When the air temperature drops, the liquid temperature also drops, and the oil cannot be fully removed in the same amount of time. 【Countermeasures that can be implemented starting today】 1. Measure and record the temperature of the degreasing solution at the start of the workday 2. Start heating earlier during winter 3. Check for water beading daily through sampling 【Free materials】 We have compiled a consistent system from pre-treatment to painting in the related catalog "What Can Be Done with Consistent Painting." It can be downloaded for free from this page.
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basic information
Defect type: Poor adhesion (peeling). Management items: Temperature of the degreasing solution, heating startup time, water repellency check, processing conditions for each season.
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Seasonal management of the pre-treatment process for metal parts coating from autumn to winter. Establishing seasonal transition criteria for the quality control department, confirming processes with painting subcontractors, and training materials for new employees.
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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.
