1 results about "Chromate salt" patented technology

This invention discloses a corrosion-resistant and recyclable tinplate food container and its preparation method, comprising a food can with a threaded post at the center of its top. A sealing cap is connected to the top of the threaded post via an internally threaded tube. A connecting ring is provided on one side wall of the sealing cap. The advantages are as follows: Through the design of the weld seam, electroplating layer, and passivation layer, after welding the joint, the weld seam can be electroplated using a tin salt electrolyte, filling any damage to the tin layer. Then, a secondary passivation process using a chromate passivation solution is performed on the weld seam to form a passivation layer, effectively connecting the weld seam to the original passivation layer and preventing localized corrosion at the weld seam. The design of the connecting ring, connecting ring 2, and carrying rope facilitates direct hand-carrying of the food can when carrying the device, preventing the loss of the sealing cap and facilitating efficient recycling of the tinplate.