Änderung der Oberflächentopographie beim Bandverzinken

ELOTOP – Influences of the electro-galvanizing process on the surface topography alterations

Situation:

  • The roughness of zinc coated steel flat products is a very important regarding the deep drawing properties and the paintability.
  • The roughness of electro-galvanized strips is set up by a skin pass rolling process of the substrate.
  • In few cases, the substrate topography is changed by electro-galvanizing more than expected. These cases need extra effort.

Solution:

  • Laboratory and in-plant trials to study the influences of the electro-galvanizing process on the surface topography
  • Focusing on topography and steel grade of the primary material, process configuration and parameters, as well as composition of the electrolyte
  • Developing of rules and models to predict the final roughness of the steel strip

Operational benefit:

  • Identification of different parameters with measurable effect on roughness alteration
  • Reasonably good description of roughness alteration by a multiple linear regression model

Broad knowledge base to increase process reliability

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