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Method for lowering the coefficient of friction of the surface of metal bands with a coating and device for applying a metallic coating onto a steel band

A technology of surface friction and metal strip, which is applied in the direction of surface coating liquid device, coating, metal material coating process, etc., and can solve the problems of DOS layer distribution and wear

Inactive Publication Date: 2007-03-28
THYSSENKRUPP AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in strip tinning plants operating at high speeds in which the steel strip passes at a strip speed of 300 m / min to 600 m / min, the aforementioned DOS emulsions prove to be disadvantageous because, if used for extruding in dipping tanks Squeeze rollers with adhering emulsions that have been used for a long time and have wear, especially corrosion on their edges, can cause problems with the distribution of the height of the DOS layer along the bandwidth

Method used

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  • Method for lowering the coefficient of friction of the surface of metal bands with a coating and device for applying a metallic coating onto a steel band
  • Method for lowering the coefficient of friction of the surface of metal bands with a coating and device for applying a metallic coating onto a steel band

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Embodiment Construction

[0015] The part of a strip tinning plant for the production of tinplate shown schematically in FIG. 1 includes a coating device not shown here. The steel strip S moving through the tin bath is electrolytically coated with a tin coating. For this purpose, the steel strip S is electrolytically degreased before the tinning process, rinsed with fully demineralized water, followed by pickling and rinsed with fully demineralized water. The steel sheet S cleaned in this way is then placed as a cathode in a tinning bath containing an electrolyte and a tin anode. With continuous monitoring and adjustment of the tinning conditions, high current densities result in a firmly adherent dense and uniform tin coating on the strip. Then, after the rinsing process, during the electrolysis, the tin surface is melted, wetted, squeezed, dried and dried in a hot 1g / L HCl solution or 3g / L tin chloride / ammonium chloride solution at 20-70°C. Brief melting in a melting tower, inductively or by resist...

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Abstract

The invention provides a method for lowering the coefficient of friction of the surface of metal bands with a coating, especially of tin-plated or chromium-plated steel bands (S), which are passed through a coating installation at a band speed (v). To be able to lower the coefficient of friction of the surface of the coating even at high band speeds through the coating installation, according to the invention, an aqueous solution of a tenside is sprayed onto the coated metal band passed at the band speed (v) after the coating process. The invention further provides a device for applying a metallic coating onto a steel band, especially in a band tin-plating installation or band chromium-plating installation.

Description

technical field [0001] The invention relates to a method for reducing the coefficient of friction of a coated metal strip surface according to the preamble of claim 1 and an apparatus for applying a metal coating on a steel strip according to the preamble of claim 22 . Background technique [0002] In the manufacture of tinplate, especially in electrolytically processed strip tinning equipment, and in the manufacture of special chrome-plated extra-thin steel sheets (ECCS) by electrolysis, after the coating process, metal-coated and chemically or Electrochemically passivated steel sheets (tin plate with tin metal and chromium metal + chromium-III-hydroxide or ECCS = electrochrome-plated steel with chromium metal + chromium-III-hydroxide) are greased to reduce banding The coefficient of friction of the coated steel sheet is high, so it is easy to process in subsequent processing. For this purpose, e.g. in the manufacture of tinplate in strip tinning plants, the tinned and pas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/02B05C5/00C25D7/06
CPCC10M2207/283C23C2/26C25D5/48C25D7/0628C10M2209/104C23C22/83C10M2219/044C23C2/40C25D17/00C10M2207/046C10M173/02C10M2209/109C10M2209/108
Inventor T·弗洛里安
Owner THYSSENKRUPP AG
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