Control method for producing trivalent chromium passivated steel coil

Abstract

The invention discloses a a control method for producing a trivalent chromium passivated steel coil. The method comprises the following steps of: cleaning and changing liquid of a working groove in roller coating equipment firstly; evacuating the passivation solution in the working groove to a working tank in the roller coating equipment; and then obtaining the temperature of a combustion chamber,controlling the temperature of the combustion chamber at 270-500 DEG C, and heating the passivated steel coil; finally, directly coating and passivating the heated steel coil to be passivated by thepassivation liquid in the working tank based on the established correspondence table. The control method provided by the invention solves the technical problems of improper use of parameters and unstable control in the prior art, realizes the passivation quality ensuring the product, so the corrosion resistance and appearance quality on the surface of the strip steel are ensured; the control method is beneficial to the long-term use and maintenance of the equipment body; and the technical effect of reducing personnel and equipment costs is realized.

Description

technical field [0001] The invention relates to the technical field of passivation, in particular to a control method for producing trivalent chromium passivated steel coils. Background technique [0002] In the hot-dip galvanizing process, the use of trivalent chromium passivation solution to passivate the surface of the strip is an important production process of the hot-dip galvanizing production line. If the parameters are used improperly or the control is unstable during the passivation process, it will affect the passivation quality of the product, which will eventually affect the corrosion resistance and appearance quality of the strip surface, and it is also not conducive to the long-term use and maintenance of the equipment body. Increased personnel and equipment costs. [0003] When the traditional production line produces trivalent chromium passivation products, there is no systematic closed-loop evaluation of the passivation effect and quality. After the custome...

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Problems solved by technology

[0004] By providing a control method for producing trivalent chromium passivated steel coils, the present invention solves the technical problems of improper use of parameters and unstable control in the prior art, realizes the passivation quality of the product, thereby ensuring the surface of the strip steel Corrosion resistance and appearance quality are beneficial to the long-term use and maintenance of the equipment body, and the technical effect of reducing the cost of personnel and equipment

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