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Design for Manufacturing:

Surface Finishing



Factors to consider when choosing surface finishing for sheet metal parts

Visual RequirementsVisual parts or non-visual parts
Corrosion RequirementsThe environment in which the parts will be used – indoor, outdoor or corrosive environment
FunctionalityWhether the parts will be subject to friction and tight tolerances
UsageMechanical usage of the parts and surface finish friction test requirements


Surface Finish Costs

  • Powder Coating cost depend on performance requirements
  • Geomet costs up to three times the cost of white zinc
  • Electrocoating costs the same as white zinc

Surface Finish

Surface Finish Thickness

Corrosion

(Hour/Salt Spray Test)

Application

Powder Coating

70µm – 150µm

96h – 1000h NSS

Indoor / Outdoor and high visual Requirements

White Zinc

5µm – 8µm

48h – 96h

Indoor / Outdoor & Low Visual Requirements

Electrocoating

≥21µm

≥96h

Indoor / Outdoor & Low Visual Requirements

Geomet

2µm – 8.6µm

≥480h

Outdoor & Tolerances



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