Conversion coating

Type of technology

Coating

Development phase

advanced

Level of innovation

enterprise level

Scale of production

mass

Technology readiness level TRL

Description of the technology

Purpose of use

change in mechanical properties – improved plasticity at the expense of strength

Use in industry

corrosion protection, cold working as a lubricant (phosphating), improvement of varnish/paint adhesion

General characteristics

A conversion coating is an inorganic surface layer produced by chemical or electrochemical methods as a result of an artificially induced and controlled corrosion process.

Alternative technologies
  • none

Visualisation

Advantages and disadvantages

Advantages

  • improved corrosion protection
  • decorative effect
  • improved paint adhesion

Disadvantages

  • requires expensive equipment

Workpiece material types

  • aluminum
  • zinc
  • copper
  • steel
  • magnesium
  • tin
  • silver

Examples of products

  • structural steel components
  • gratings
  • frames
  • rods
  • garden tools (shovels; rakes; shears)
  • bicycle frames
  • metal furniture components (legs and handles)
  • pipes
  • valves
  • weapon components (barrels and locks)

Implementation of technology

Required resources

  • heat furnaces

Required competences

  • on-the-job training
  • knowledge of materials engineering

Environmental aspects

Water consumption

Energy consumption

Waste generated

Expert evaluation

Competitiveness

Usability

Environmental impact

Development centers

  • AGH University of Krakow
  • Institute of Metallurgy and Materials Science of Polish Academy of Sciences
  • Warsaw University of Technology
  • Cracow University of Technology
  • Łukasiewicz – Upper Silesian Institute of Technology
  • Czestochowa University of Technology

Legal conditions

  • none

Companies using technology

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