Cleaning surface preparation techniques

Cleaning surface preparation techniques

The first and mandatory stage of any surface preparation prior to the cating deposition is cleaning and degreasing.
At this stage the contaminants are removed from the substrate surface: mineral oils (Rust protection oils, Cutting fluids (coolants), greases, etc.), miscellaneous organic soils (paints, animal lubricants and vegetable lubricants, fingerprints).

The cleaning techniques:


  • Solvent cleaning

    - removal of organic soils (mineral oils, fingerprints etc.) by dissolving them in a solvent. The solvent may be used in the liquid state, when the part is either immersed into the solvent or sprayed by it. The solvent may also be used in the gaseous state (vapor degreasing) when the soils are dissolved by the solvent vapors. Use of some solvents like trichloroethylene and trichlorathane (chlorinated hydrocarbons) is forbidden or restricted in most of the world due to their adverse effect on the human health.
  • Alkaline cleaning

    – removal of organic soils (mineral oils,fingerprints, wax etc.) and some solid particles by hot alkaline solutions.
  • Spray cleaning

    – cleaning by aqueous solutions (alkaline or mild acids) delivered to the part surface through spray nozzles at high pressure.





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