Production process of electroplated tin plate with iron ion content of less than or equal to 0.05 ppm in beer can

• Main Authors: PANG TAO, HUANG XIANQIU
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2023
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS

The invention discloses a production process of an electroplated tin plate with the iron ion content smaller than or equal to 0.05 ppm in a beer can. The manufacturing process of the electroplated tin plate comprises the steps of tinning a base plate, degreasing, electroplating tin, softening and melting, passivating, rinsing and oiling. The content of Na2Cr2O7 in a passivation system is 20-23 g/L, and the content of CrO3 in the passivation system is 3-5 g/L; the content of sodium gluconate in the rinsing water of the rinsing system is 40-50 mg/L. The production process of the produced electroplated tin plate is suitable for continuous and rapid tin plating of plates, strips and wires, and the produced electroplated tin plate is high in corrosion resistance and not prone to rusting in transportation and storage; and after the tin electroplating plate is used for manufacturing the tank, the safety level of the steel tank and the content is improved. 本发明公开了一种啤酒罐内铁离子含量≤0.05ppm的电镀锡板生产工艺，所述电镀锡板的制作流程为：镀锡基板→脱脂→电镀锡→软