This is an introduction to the hexavalent chromium-free treatment coating "trivalent black chromate."
Our company implements quality control to supply safer products, obtains customer certification, and provides products accordingly. Hexavalent chromium is used in black chromate (black zinc) as a rust prevention treatment coating. With the increasing awareness of environmental issues and the demands of customers, there has been a growing need for higher quality and safer products, starting with the RoHS directive. To meet this demand, we supply products that have a hexavalent chromium-free black conversion treatment coating (trivalent black chromate) with an appearance equivalent to conventional black chromate. This product is particularly safe, meeting the EN15205 standard of 0.1μg/cm² for hexavalent chromium leaching. It is very easy to handle. For more details, please download the catalog or contact us.
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basic information
**Features** - Does not contain hazardous substances or regulated substances such as RoHS target substances or PFOS compounds. - The coating is primarily composed of trivalent chromium and inorganic materials. - Has an appearance equivalent to black chromate using hexavalent chromium. - Has corrosion resistance equivalent to black chromate using hexavalent chromium. - A particularly safe product that meets the EN15205 standard of 0.1μg/cm² for hexavalent chromium leaching. **For more details, please download the catalog or contact us.**
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Applications/Examples of results
Our company performs plating on small screws, cap screws, pressed and turned parts, and others using barrel plating, and for rack plating, we provide plating for copper plates for power distribution, pressed and machined parts, and others.
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Company information
In the plating industry, we have been actively addressing environmental issues for a long time. Our company has been implementing cyanide-free processes since 1973, with consideration for the environment and safety. Additionally, at the Ota factory, which was completed in August 2007, we have further improved customer satisfaction and taken environmental considerations into account by eliminating the use of hexavalent chromium to "zero" in order to comply with the RoHS directive and green procurement, making it an environmentally friendly factory where we carry out processing with trivalent chromate and non-chrome. October 1946: Founded Tonan Omura Plating Co., Ltd. in Kamimeguro, Meguro-ku, Tokyo. January 1952: Reorganized as Tonan Plating Co., Ltd. April 1965: Opened the second factory (2-45-12 Kamimeguro, Meguro-ku). April 1969: Opened the third factory (4-5-1 Kamimeguro, Meguro-ku). March 1991: Merged the third factory into the second factory. June 1991: Changed the company name to Tonan BP Co., Ltd. and relocated the headquarters to the current location. September 2005: Opened the Omura Plating Factory (specializing in racks). August 2007: Closed the second factory and opened the Ota factory (specializing in barrels).