Electrodeposition repair method for damaged nickel-cobalt coating of crystallizer copper plate

Abstract

The invention discloses an electrodeposition repair method for a damaged nickel-cobalt coating of a crystallizer copper plate. The electrodeposition repair method is characterized in that in-situ repair is realized by adopting a slotless electrodeposition technology in a way that a nickel plate as an anode dips an alkali deposition liquid to reciprocate on the surface of the damaged nickel-cobaltcoating of the crystallizer copper plate as a cathode, and further a nickel-cobalt repair layer is deposited on the surface of the damaged nickel-cobalt coating of the crystallizer copper plate. According to the electrodeposition repair method disclosed by the invention, in-situ repair of the damaged nickel-cobalt coating is realized on the crystallizer copper plate by adopting the slotless electrodeposition technology; the problems of thin angle coating, limited repair times and the like existing in the prior art can be effectively solved; the obtained nickel-cobalt repair layer is uniform inthickness, and the sizes of the angle part and the surface part are basically 500 to 1000mu m; in addition, by repeated friction between an anode and a cathode, the defects of needle holes, hard spots, nodules and the like in a conventional electrodeposition process can be effectively overcome; the obtained nickel-cobalt repair layer has a compact structure and smooth surface.

Description

technical field [0001] The invention belongs to the technical field of electrodeposition, and in particular relates to an electrodeposition repair method for damaged nickel-cobalt coating on a mold copper plate. Background technique [0002] At present, the commonly used inner coatings of mold copper plates include pure nickel coatings, nickel-iron coatings and nickel-cobalt coatings. Compared with pure nickel coatings and nickel-iron coatings, nickel-cobalt coatings have two major advantages in addition to similar physical and chemical properties. : (1) Higher hardness, especially at high temperature; (2) Better chemical stability, especially thermal stability and high temperature wear resistance have been greatly improved. [0003] During the entire continuous casting production process, the mold copper plate not only bears the scour of high-temperature molten steel, but also is rubbed by the steel billet and mold slag, which makes the inner coating of the mold copper plat...

AI Technical Summary

Problems solved by technology

This will cause the matrix to become thinner and thinner, which greatly affects the number of repairs. Usually, it cannot be repaired after 4 to 5 repairs.

[0005] (2) Due to the lower current density at the corner of the crystallizer compared to the face, the thickness difference between the face coating and the corner coating after conventional restoration is large (usually 4 to 5 times), that is, the corner coating is thinner, and the actual In use, the coating at the corner of the crystallizer tends to wear more easily, so the repair effect is not ideal

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