If the surface preparation (substrate adjustment) before painting is not done properly, there is a high possibility that the metal and paint will not adhere well and will peel off.
To maintain a beautiful paint film for a long time without peeling, the following four points are important: 1. Degreasing Treatment Metal materials are often exposed to cutting oils and other substances during cutting and processing. Therefore, most processed materials have oil residues on their surfaces. If there is oil on the surface, the paint will be repelled during application, leading to poor adhesion. It is important to thoroughly wipe off the oil using organic solvents such as thinner and allow the surface to dry. 2. Surface Preparation (Substrate Adjustment) Prepare the substrate to be suitable for painting. This process, also known as "keren," involves scraping the surface to create scratches that enhance the adhesion of the paint. If rust has already formed, painting over it will allow the rust to progress from underneath the paint, so it must be removed. Painting over deteriorated paint films can also cause poor adhesion, so the old paint film should be stripped away. Methods include blast treatment, sanding with a disc sander, or scrubbing with a wire brush or sandpaper. After processing, debris will be generated, so be sure to clean thoroughly! 3 and 4 are detailed in the basic information below.
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3. Primer There are primers, intermediate paints, and topcoats in paint types. Primer is designed to adhere firmly to metal (the substrate) and prevent rust. It is possible to skip the primer and only apply the topcoat, which can easily improve the appearance. However, since topcoats are primarily made to adhere to paint, applying them directly to metal (the substrate) may result in insufficient adhesion and a higher likelihood of peeling off. Therefore, it is important to properly apply primer. 4. Paint Suitable for Metal When we refer to metal, it includes various types such as steel, aluminum, stainless steel, copper, and brass. Paint is not universally applicable to all metals; it is designed and manufactured to be suitable for specific types of metal. Therefore, it is necessary to confirm that the paint is compatible with the metal being painted. By strictly adhering to these four points during painting, it can be said that the causes of paint peeling, aside from direct external factors and aging deterioration, can be almost completely prevented. To be more specific, one should also pay attention to the weather conditions during painting and the temperature of the metal... For more details, please refer to the related links below.
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Turning customer troubles into satisfaction. We respond to such customer requests. From "nothing" to "something." Creating "one-of-a-kind" rather than "mass production." Harada Iron Works is dedicated to fulfilling those desires. To meet the diverse needs of our customers, we provide a consistent production service from material procurement to painting and installation, assisting in reducing lead times and total costs. With over 70 years of experience, we are committed to providing even higher "added value" to our products through the skills and know-how we have honed over the years. If you have any inquiries regarding production or painting, please feel free to contact us. We look forward to hearing from you. For blasting and painting, leave it to us. Harada Iron Works Co., Ltd. Hiroshima TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Please feel free to contact us for consultations or estimates.
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Our company manufactures products tailored to the diverse needs of various sites. We respond to customer requests with our capabilities, advantageous location, and thorough quality and delivery management. You can trust us with everything from material ordering to can manufacturing, processing, surface preparation, and painting. Additionally, we have dedicated many years to research and development in rust prevention, establishing a solid technology and facilities as a "rust prevention department," and we also perform tasks such as paint stripping. Please feel free to contact us with any requests.