Protecting and Finishing Surfaces
Surfaces on connection parts are exposed to a whole range of aggravating elements and have to be resistant to:
- Mechanical strain such as vibrations and scratches
- Chemical stress from salt water, acid rain, and so on
- UV radiation
- Extreme temperature changes
- Solvents such as oil and gasoline
This is where surface finishing comes in. It is a process that provides connection parts with new or improved features such as better electrical conductivity, coefficients of friction, or wear protection.
Both metallic and non-metallic coatings can be applied. ETTINGER supplies two kinds of metallic coatings:
- Electroplating in line with EN ISO 4042
- Chemical nickel plating
The electroplating process uses electrical current to deposit metals (zinc, copper, nickel, or tin) or metal alloys (zinc-nickel, zinc-iron, or zinc-cobalt) on the steel surface. The color of the metal layer can then be changed by means of passivation or sealing.
- Excellent corrosion protection
- Thin coatings (3–15 μ)
- No need to recut threads
- Color stability
Chemical treatments use an electroless chemical coating based on an aqueous nickel saline solution. The lack of current means that it is possible to coat even non-conductive parts.
- Outstanding corrosion protection
- Even coating distribution, including on internal surfaces with low coating tolerances
- Coatings adhere to contours without build-up at edges
- Coating thicknesses can be adjusted easily
- Good chemical resistance
- High degree of hardness
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