Metaloverflader

Metaloverflader, or metal surfaces, refer to the exterior of metal objects and components. They include the naturally formed oxide layer on some metals and any intentional finishes applied during manufacture or service. The properties of a metal surface—such as roughness, microstructure, cleanliness, and chemical state—affect adhesion of coatings, wear resistance, corrosion behavior, heat transfer, and aesthetic appearance.

Finishes and treatments aim to improve performance or appearance and can be mechanical, chemical, or depositional. Mechanical finishing includes grinding, polishing, brushing, and texturing to change roughness and reflectivity. Chemical and electrochemical processes include passivation, pickling, phosphating, electroplating, galvanizing, anodizing, and etching. Deposition methods such as physical vapor deposition (PVD) or chemical vapor deposition (CVD) apply hard coatings. Painted or powder-coated surfaces provide barrier protection and color.

Roughness and surface cleanliness are commonly specified using specifications such as Ra values and profilometry measurements. Surface treatment compatibility with subsequent processes is important; for example, coatings must adhere to the substrate, and heat treatments can change surface properties. Corrosion protection is a major driver for surface engineering.

Common applications span architecture, automotive, aerospace, electronics, cookware, and industrial machinery. Maintenance includes cleaning and re-coating as needed; improper cleaning can damage finishes. Standards and norms exist for surface quality, measurement methods, and compatibility between materials and finishes.