Our chromium-free passivation safety tin box is an upgraded environmentally friendly metal packaging product optimized based on traditional tin box passivation technology, completely abandoning the traditional chromate passivation process that contains harmful chromium components, and adopting advanced chromium-free passivation treatment technology. Traditional tin boxes usually use chromate passivation to improve oxidation resistance, but the chromium elements contained are toxic and harmful, which not only pollute the production environment but also may cause heavy metal residue risks and fail to meet high-standard environmental protection and safety requirements. Our chromium-free passivation process uses environmentally friendly inorganic passivation solution, which undergoes chemical film formation treatment on the surface of tinplate, forming a dense, stable, and non-toxic protective film on the metal surface, fundamentally eliminating the safety hazards brought by chromium substances.

The chromium-free passivation treatment endows the tin box with more stable physical and chemical properties while ensuring environmental safety. The formed protective film has excellent oxidation resistance, corrosion resistance, and weather resistance, which can effectively prevent the tin box from rusting, discoloring, and oxidation during long-term storage, transportation, and use. Compared with traditional chromate passivation tin boxes, the chromium-free passivation layer has stronger adhesion, is not easy to fall off or fade, and can maintain the smooth metallic luster of the tin box for a long time. The whole passivation process is pollution-free and zero-emission, does not produce toxic waste liquid and waste residue, meets international environmental protection standards such as RoHS and REACH, and belongs to green and environmentally friendly production technology. All products have passed professional environmental protection testing, confirming that they are completely free of chromium, lead, mercury, cadmium and other harmful heavy metals, and do not contain any toxic and harmful chemical components.

This chromium-free passivation safety tin box has wide adaptability and high safety, and can be used in high-standard packaging fields such as food packaging, children's products packaging, medical supplies packaging, and high-end gift packaging. The non-toxic and harmless surface treatment ensures that the tin box will not cause any harm to human body and the environment during use and recycling. The stable passivation layer also improves the printability and processability of the tin box, making surface printing, embossing, laser engraving and other processes more stable and exquisite, with clearer patterns and more durable colors. In addition, the chromium-free passivation tin box has excellent durability, and still maintains complete performance and beautiful appearance after long-term repeated use and cleaning. It is an ideal safe and environmentally friendly packaging material for modern high-end brands, and is deeply favored by industries with strict safety and environmental protection requirements.