High-tin tinned plate edge quality control method

Abstract

The invention discloses a high-tin tinned plate edge quality control method. P plating tanks are arranged on a soluble anode tin plating production line. Each plating tank is equipped with a press roll and a conductive roll correspondingly. Each plating tank is equipped with an anode pure tin bar as a tin plating source. The concentration of tin ions in electroplating liquid of each of the P plating tanks is controlled within 19-25 g / L; the current density of M plating tanks among the P plating tanks is controlled within 28-30 A / dm2, and the current density of N plating tanks among the P plating tanks is controlled within 20-28 A / dm2. In the tin plating process, in the M plating tanks, a steel strip passes the M plating tanks in sequence to be subjected to tin plating and then is rolled through cooperation of the corresponding press rolls and the corresponding conductive rolls in the M plating tanks; and then the steel strip passes the N plating tanks and are subjected to tin plating in sequence and then is rolled through cooperation of the corresponding press rolls and the corresponding conductive rolls in the N plating tanks to form a high-tin tinned plate.

Description

technical field [0001] The present application relates to the technical field of metal material processing, in particular to a method for edge quality control of high tin content tinplate. Background technique [0002] Tin plate refers to a cold-rolled low-carbon steel sheet coated with pure tin on both sides, which combines the strength and formability of steel with the corrosion resistance and solderability of tin in one material. Among them, the tin plate with a tin plating amount of 11.2g / m2 is a high tin amount tin plate. The soluble anode tin plating production line refers to that the tin ions required in the electroplating process come from the pure tin strips of the anode. As the electroplating process progresses, the tin strips gradually dissolve and consume, and it is necessary to continuously replace the tin strips of the anode to ensure the concentration of tin ions Constant supply. [0003] In the process of producing strip steel with high tin coating amount i...

AI Technical Summary

Problems solved by technology

After the loose coating at the edge of the strip contacts the roller, it adheres to the surface of the roller and accumulates more and more, eventually causing the pressure roller to be damaged and tin powder to fall off the edge of the finished strip

And the damage speed of this conductive roller pressure roller is very fast, and the roll surface of its conductive roller pressure roller will be damaged when producing about two coils of strip steel, can't guarantee the continuous production of strip steel, and the edge quality of strip steel is poor

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