[Troubleshooting] Black dye that easily turns red. Here are methods to improve corrosion resistance.
Black dyeing treatment is also referred to as "ferric oxide treatment." When iron products are reacted in a high-temperature alkaline solution, black iron oxide known as ferric oxide is produced. The black dyeing film has the property of gradually discoloring (oxidizing) to red over time as it reacts with water and oxygen in the air. The time it takes for discoloration to occur varies depending on the type of iron material, processing history, thickness of the black dyeing film, and storage conditions. To prevent discoloration of the black dyeing, it is important to constantly protect the surface with oil or similar substances and to avoid reactions with moisture in the air. Care should be taken during long-term storage as the oil may dry out. Our company adjusts the black dyeing treatment process according to the type of iron material. Additionally, while products are usually completed with an oil coating, if desired, a clear coat can be applied to further enhance corrosion resistance. Please feel free to consult us with any concerns regarding black dyeing.
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Prevention of discoloration in black dyeing, improvement of corrosion resistance, and enhancement of color uniformity.
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Sasagawa Plating Co., Ltd. (Sanjo City, Niigata Prefecture) is a company that performs metal surface treatments such as chrome plating, nickel plating, electroless nickel plating, and blackening. While we excel in mass production through automated lines, we also possess production equipment and know-how for manual processes, making us strong in handling a variety of small lots and short delivery times. ★ Customization Capability We adjust the type of plating and film thickness according to customer requests and propose optimal surface treatments. We can accommodate not only mass production but also prototypes or even a single piece. ★ Speedy Response We flexibly respond to urgent requests and achieve processing with short lead times (we have a record of as short as 2.5 hours). We are recognized for our expertise in mass production on automated lines, delivering high quality and short delivery times. ★ Diverse Plating Technologies Utilizing plating technologies cultivated over many years, we cater to products in various industrial fields. We have established collaboration with partner factories to meet diverse surface treatment needs. ★ Environmental Consideration We are equipped with our own wastewater treatment facility and strive to reduce environmental impact. In 2021, we introduced solar panels, achieving an annual savings of approximately 90,000 kWh.