St3 removes loosely adhering contaminants (such as oil, dirt, rust, and oxides) visible to the naked eye, but firmly adhered contaminants are acceptable.
"Work Method for ISO St3" 1. Remove slag and other contaminants adhering to the surface. 2. Use solvents to remove oils, greases, and other substances adhering to the surface. 3. Use power tools to remove weakly adhered harmful substances from the surface. 4. Use hand tools for areas where power tools cannot be used. 5. Remove dust and debris with clean, dry air. "Points to Note for ISO St3" Hazards in the Work Process - Since power tools are used, appropriate protective gear must be worn, and precautions against fire due to sparks are necessary. Post-Processing Painting Steps - The treated surface becomes active and rust can form quickly, so painting must be done promptly. - Areas that cannot be treated with power tools, such as corners and complex structures, need to be processed using hand tools as well. - Compare with photos in the ISO visual book to determine the quality of processing. At Harada Iron Works, we also accommodate surface preparation for St3, but since there may be insufficient cleanliness and adhesion with St3 surface preparation, we generally recommend surface preparation by blasting. For more details, please refer to the related link URL below.
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"Benefits of Performing ISO St3" ISO St3 is a cleanliness standard that uses both power tools and hand tools. Since blasting requires equipment and generates dust and noise, it is selected in cases where considering the surrounding environment makes it difficult. Additionally, because it takes time and costs money, it is not suitable for large-scale or extensive work, but it may be used for surface preparation when correcting partially damaged paint. While it is a convenient method that does not require equipment, it cannot remove adhered rust, mill scale, or paint film. "Summary" St3 is a standard for surface preparation that uses power tools instead of blasting. The removal of weakly adhered harmful substances is required, but only for those that are firmly attached. When the processing range is extensive or large-scale, it requires significant costs and work time, making it unsuitable; however, it is a standard used when surface preparation by blasting is difficult. The extent of surface preparation needed varies depending on the condition of the steel material, so if the required standards are not clearly defined, it may lead to early paint defects. Since it is challenging to determine clear requirements, caution is necessary in demands and construction.
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Turning your troubles into good experiences for our customers. We respond to the needs of such customers. From "nothing" to "something." Creating "one-of-a-kind" rather than "mass production." Harada Iron Works is here to fulfill those desires. To meet the diverse needs of our customers, we provide a consistent production service from material procurement to painting and installation, helping to shorten delivery times and reduce 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.