Thread Content
01 Main Components: By conducting in-depth research based on existing technologies, Inagawa Chemical has developed a selenium-copper-based blackening agent that provides excellent blackening effects and superior rust prevention properties for steel. 02 Purpose: Blackening is a common method used for rust prevention on steel surfaces. Its principle involves forming a black layer on the surface of the steel, which acts as a barrier to prevent air from reaching the surface and causing rusting. This product is mainly used for the surface treatment of steel and other iron products. 03 Key Performance: Blackening at room temperature; no heating equipment required, resulting in lower energy consumption ； Soaking treatment makes operation and production more convenient ； It has strong process adaptability; after blackening, applying an oil seal can prevent rust for up to two years ； It has good adhesion to the film, and the surface of the workpiece remains stable after blackening. 04 Main Technical Specifications 05 Usage Method: 1. Add 300–600 L of blackening solution to the treatment tank and stir to ensure complete dissolution; then add water to bring the total volume to 1000 L ； 2. Treatment method: soaking ； 3. Temperature: Room temperature. 4. Time: 8–20 seconds (the blackening time can be adjusted according to actual needs). 5. Processing capacity: Approximately 0.8–1.2 m2/L (in industrial production, the actual test results shall prevail). Processing sequence: Degreasing and rust removal → Water washing → Surface treatment → Purified water washing → Blackening → Purified water washing → Application of anti-rust oil → Post-treatment. 06 Precautions: ☆ Before processing, the workpieces must be rust-free and degreased. ☆The treatment tank should be made of stainless steel, thick-walled plastic sheet, or carbon steel with an anti-corrosion lining; the exchangers and nozzles should be made of stainless steel or nylon, while the piping and pumps should be made of stainless steel. ☆During the blackening process, the workpieces should be arranged properly and reasonably, with no overlapping between them; depending on the situation, the original solution should be added regularly in appropriate amounts. ☆This product is acidic and can irritate human skin; it is necessary to avoid direct contact of the darkening liquid with the skin, as well as to prevent ingestion or splashing into the eyes. If it accidentally gets into the eyes, rinse thoroughly with plenty of water and seek medical attention promptly. 07 For wastewater containing weakly acidic liquids, neutralization is required to dilute them to a level where they can be discharged directly; users can carry out appropriate treatment according to their own requirements before discharging them. 08 Result after treatment (Left: blackened treatment; Right: untreated)