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

Recommendation

TriboCoat – Optimization of highly stressed sliding contacts by the use of innovative coating and surface concepts

Situation: Frequent malfunction in the case of sliding contacts in the boundary friction regime for discontinuous movements and high loads. […]

Schmelzinjekt2 – Recycling of zinc-containing filter dust

Initial situation: Quantity of zinc-containing filter dust from melting processes increases (Zn as corrosion protection) Up to now, recycling solution […]

PSP-BOF – Removal of Phosphorus from BOF-slag

Initial situation Increased cost for raw materials and for landfilling have forced European steelmakers to look for new ways to […]

Slagreus – Reuse of slags from integrated steelmaking

Initial situation In Europe about 10 Mio.t/year of BOF slag are produced at the steelmaking. A main part is reused […]