Painting method to prevent SS400 from rusting for a long time.
What is SS400? In JIS (Japanese Industrial Standards), there is a standard for rolled steel materials known as general structural rolled steel. General structural rolled steel is represented by the material symbol SS, and since the minimum tensile strength is 400 MPa, it is called "SS400." It is a type of steel that is widely used across various fields, making it abundant and inexpensive to obtain. It is characterized by its ease of machining and welding, as well as its high versatility. On the other hand, it is a relatively soft material among steels, making it difficult to use in areas that require high strength, and it is prone to rust, necessitating anti-rust treatment. Therefore, some form of rust prevention treatment is required. Additionally, the surface of the steel is covered with "mill scale," which is formed when the surface becomes hot during the manufacturing process and combines with oxygen. If the mill scale is not removed, the anti-rust treatment will not last long. There are two methods for removing mill scale: "pickling" and "blasting," with blasting being superior for preventing rust over a longer period. By completely removing all foreign substances like mill scale through blasting and applying anti-rust treatment to the formed surface of the substrate, SS400 can remain rust-free for an extended period.
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basic information
"Methods to Prevent Rust" SS400 is a material that is prone to rust, so it can easily rust if left untreated. Generally, rust prevention treatments are applied for products that cannot tolerate rust. The widely used rust prevention methods include plating, blackening, and painting. Blackening tends to have low rust prevention capability and is inexpensive, while painting has high rust prevention capability and is costly. Each method has its advantages and disadvantages, so the choice of treatment method should consider the environment in which it will be used and its expected lifespan. "Methods for Removing Scale" There are two methods for removing scale. 1. "Acid pickling with strong acids such as sulfuric acid or hydrochloric acid" This method dissolves the surface scale, rust, and oil using the power of acid. A significant advantage is that it can treat complex shapes as long as they can be submerged in the liquid. It is generally performed as a pretreatment before plating. 2. "Blasting with particles to abrade the surface" This method can remove all foreign substances (scale, rust, paint film, dirt, oil, etc.) adhered to the surface. By completely exposing the metal substrate and creating surface roughness, it also improves adhesion, making it the most effective treatment method. It is generally performed as a pretreatment before painting.
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We respond to our customers' troubles by turning them into positives. From "nothing" to "something." Creating "one-of-a-kind" products instead of "mass production." This is what Harada Ironworks is here for. We provide a consistent production service from material procurement to painting and installation, helping to shorten delivery times and reduce total costs to meet the diverse needs of our customers. With over 70 years of experience, we are committed to providing even greater "high added value" to our products through the skills and know-how we have honed over the years. If you have any questions about production or painting, please feel free to contact us. We look forward to hearing from you.
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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.
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