Manufacturing process of anti-corrosion coating on surface of conductive roller

Abstract

The invention discloses a manufacturing process of an anti-corrosion coating on the surface of a conductive roller. The manufacturing process sequentially comprises the steps of texturing the end face of the conductive roller, electroplating nickel-based alloy, polishing an interface, texturing the roller surface of the conductive roller, plating chromium on the roller surface and polishing a boundary area for smooth transition. The surface of the conductive roller is treated by plating chromium on the roller surface and plating nickel alloy on the end surface, and the interface of the two plating layers is positioned on the end surface; the roller surface and the end surface of the conductive roller are changed from original full chromium plating to roller surface chromium plating and nickel alloy plating on the end surface, and the interface of the two plating layers is located on the end surface; and the plating layer form of the conductive roller not only ensures the wear-resistant requirement of the roller surface of the conductive roller, but also ensures the corrosion-resistant requirement of the end surface, so that the service life of the conductive roller is prolonged to a great extent, the downtime of equipment is reduced, and the production efficiency of a strip steel electroplating unit is improved.

Description

technical field [0001] The application belongs to the technical field of coating manufacturing technology, and specifically relates to a manufacturing technology of an anti-corrosion coating on the surface of a conductive roller for electro-tinning or chromium wire on cold-rolled strip steel. Background technique [0002] Tin or chromium plating on cold-rolled steel sheet is a reprocessing method for cold-rolled steel sheet. Tin-plated or chrome-plated steel sheet is widely used in the food industry and other industrial fields. Oiling, rust removal, electroplating, reflow, quenching, cooling, coiling, cutting, packaging and other processes. During electroplating, anode plates are hung on both sides of each plating tank, a conductive roller is installed in the slot at the upper end, and a sinking roller is installed at the lower end of the bath. During electroplating, the steel plate passes through the surface of the conductive roller and enters the sinking roller to transiti...

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Problems solved by technology

[0004] 1. The plating solution has the characteristics of high viscosity, and it is generally difficult to wash it clean, especially for continuous chrome plating units, it is more likely to cause enrichment on the surface of rotating parts, making it adhere to the surface of the conductive roller, causing the conductive roller to be wet for a long time and easy to corrode state

[0005] 2. The chromium plating solution has the characteristics of strong acidity and strong oxidation. If the chromium plating solution contains fluoride ions, its corrosiveness will be even greater

[0007] 1. The service life of the roller is lower than the theoretical requirement, causing the unit to shut down and affecting the production efficiency of the unit

[0008] 2. The chrome plating layer on the end surface is peeled off, which will easily cause the flaky chrome plating layer to enter the plating solution, causing the purity of the plating solution to be too poor and affecting the quality of strip steel plating

[0009] 3. The flaky peeling layer will dissolve in the chrome plating solution, causing the trivalent chromium in the plating solution to exceed the standard, causing the tank pressure of the electrochrome plating unit to increase, which may affect the quality of the strip while wasting energy

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