Surface Finishing

FinishCorrosion ResistanceCoating ThicknessAbrasion Resistance

Powder Coating

· Corrosion resistance depends on type of material used and pre-treatment process

· Surface must be pre-treated before powder coat or part will be at risk of corrosion and adhesion issues

· Chips or incomplete coverage adds to risk of corrosion

· Can range from 70 to 150μm

· Thicker than traditional liquid paint

· Improves appearance

· Various colors and textures available

· Heat cured finish

· Material composition and pre-treatment may have enhanced abrasion resistance

· Creates a hard finish that resists abrasion well


· Good corrosion resistance

· Provides physical and chemical barrier to corrosion

· Typically 12 to 30μm but can be more

· Often used to increase surface thickness

· Thickness of application is uniform

· Good durability

· Heat cured finish

· Good longevity

Zinc Plating

· Provides physical barrier to corrosion

· Acts as a sacrificial anode to prevent corrosion

· Parts can sustain minor damage and remain corrosion resistant

· Can range from 5 to 25μm

· If use as an undercoat for other finishes, poor adhesion

· Best for detailed surfaces and not heavy-duty applications

· Very strong finish

· Highly durable to abrasion


· Provides barrier resistance to corrosion

· Creates passivation effect on surface

· Between 5 to 7.6μm

· Can be used under a painted finish

· Mid abrasion resistance

· Electrically conductive finish

· Good resistance to chemicals, organics, heat, salt


· Good corrosion resistance

· Commonly used for saltwater or marine environments

· Ranges from 0.5 to 150μm

· Hard, wear resistant finish

· Often used for parts that come in frequent contact with other material


· Good corrosion resistance through an inert, oxide layer

· The process removes free iron from the surface leaving a thin and transparent oxide film

· Does not change durability or abrasion resistance

Galvanized Dipped

· Provides barrier resistance to corrosion

· Acts as a sacrificial anode to prevent corrosion

· At more than 254μm the finish is prone to flaking

· Poor appearance

· Can adjust thickness of finish to accommodate needs

· Often used in harsh environments because of durability

· Good abrasion resistance

· Good durability and longevity

· Surface damage can result in corrosion

FinishCarbon SteelStainless steelAluminiumApplicationVisual RequirementsThicknessCorrosion resistance
Mill Finish  Internal Parts or Parts with Subsequent ProcessingLow-Visual--
Antirust Oiling Parts with Subsequent ProcessingLow-Visual-24 Hours NSS
Brushed  IndoorMed-Visual--
Anodized Indoor / OutdoorHigh-Visual--
Micro-Polishing Indoor / OutdoorHigh-Visual--
Passivation Indoor / OutdoorMed-Visual0.5 to 15μm-
Zinc Plating Indoor / OutdoorLow-Visual5 to 25μm48 to 94 Hours NSS
E-Coating  Indoor / OutdoorLow-Visual5 to 25μm96 Hours NSS
Powder Coating   Indoor / OutdoorHigh-Visual70 to 150μm480-1000 Hours
Aluminum Aluminium
Steel Steel
Stainlesssteel Stainless Steel
Steel Steel
Aluminum Aluminium
Stainlesssteel Stainless Steel
Aluminum Black Aluminum Black
Aluminum Natural Aluminium Natural
Ecoating Aluminium
Blackmatte Black Matte
Blacksandtex Black Sandtex
Blackglossy Black Glossy
Coolgrey Cool Grey
Orange Orange
White White
Yelloworange Yellow Orange
Zinc Zinc
Stainless Steel Stainless Steel
Stainless Steel Stainless Steel

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