Technologies available for licensing, investment, joint ventures and R&D contracts in Ukraine, Azerbaijan, Georgia, Moldova, Uzbekistan

Frontpage Slideshow (version 2.0.0) - Copyright © 2006-2008 by JoomlaWorks

Google Translate

Patenting Information

Tag Cloud



Free counters!

Home Material Sciences Material- and energy-saving production of tinplate

Material- and energy-saving production of tinplate

Description

The main problems of modern production: the tenfold tin cost increase within the latest 50 years and the use of highly toxic components. According to the proposed production process, a thin (0.73, 1.46 or 2.19 g/sq.m/side) protective lustrous texturally-composite tin coating is obtained using a low-toxicity sulfate electrolyte of increased stability. Then a passive film is applied onto the tin coating in a chromium-free low-toxicity electrolyte (instead of the coat fusion operation).

The basic production items are:
1. The developed tinning technology that provides formation of a textured tin coating on the canned food steel sheet. Forming of a specified texture in tin coating leads to an increase of its protective ability while maintaining the adhesive strength and plasticity characteristics. This ensures an adequate corrosion resistance of the passivated tinned sheet in various foodstuff media while the tin coating weight is brought down to 0.73-2.19 g/sq.m/side. Operating characteristics of the electrolyte remain stable over its whole operating time due to the preclusion of meta-tin acid precipitate formation. The increased electrolyte resistance against the influence of oxidizers due to an aggressive suppression of the transition reaction of bivalent tin to its tetravalent state increases the duration of the tinning electrolyte stable operation by 10 times and more. A method for electrochemical tinning of steel sheet at the tin deposition rate of 0.1-0.15 μm/s is proposed.
2. The developed passivating technology that provides forming on the tin coating of a colorless protective film, and whose usage eliminates the energy-consuming operation of coating fusing. A method for cathode passivation of tinned steel sheet during 2-3 s is proposed.

Innovative Aspect and Main Advantages

The proposed tinplate production process is based on three potential inventions that are grounded on the usage of the recently found phenomenon of the structure formation in the metallic materials being electrochemically deposited through a stage of liquid state (see O.B. Girin. Phase Transformations in the Metallic Materials being Electrodeposited and Their Application for the Development of Advanced Technologies for Anticorrosive Protection of Canned-Food Steel Sheet // Materials Science Forum (Switzerland). – 2007. – V.561-565. – P.2369-2372).

The major advantages of the new production technology:

  • The reduction of the tin coating weight to 0.73-2.19 g/sq.m/side while preserving its protective and decorative properties, with the resulting reduction of the tin and electric energy consumption.
  • Elimination of highly toxic components during the electrochemical deposition of the tin coating onto the steel sheet and subsequent passivation.
  • Increased tinning electrolyte resistance against the influence of oxidizers that increases the duration of its stable operation by 10 times and more.
  • Increased rate of tin deposition onto the steel sheet to 0.1-0.15 μm/s.
  • Replacement of the energy-consuming operation of coating fusion on the steel sheet with the operation of tinned steel sheet passivation.
  • Increased protective ability of the passive film by two times in comparison to the protective ability of the passive films obtained in commercially used highly toxic electrolytes containing chromium compounds.
  • Application of a simplified system for water effluents cleaning.
  • The production process does not require any capital expenditure and is applicable to existing equipment.
  • The developed additives to the tinning and passivating electrolytes are low toxic and not expensive. The synthesis of these additives can be performed at any chemical facility.

Areas of Application

  • Metallurgical industry: production of tinplate.

Stage of Development

Prototype is available for demonstration and testing, patent and marketing searches have been carried out, secret know-how is present, documents are being prepared for patenting of the inventions.

Contact Details

Contact person: Prof. Oleg Girin
Organization: Ukrainian State University of Chemical Engineering
Address: 8, Prospekt Gagarina, Dnipropetrovsk 49005, Ukraine
Теl: (38 0562) 68 21 66/67 97 25
Fax: (38 0562) 33 71 36/47 33 16/67 97 25
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Add comment


Security code
Refresh

For additional technologies go to: http://www.stcu.int