Machining and finishing of aluminium - BWB

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04 _ SURFACE CONVERSION pROCEDURES SURFACE CONVERSION pROCEDURES FOR ARCHITECTURE AND DESIgN
BWB carries out a very wide range of surface conversion procedures on components for architecture and design, in order to satisfy a variety of requirements regarding function, aesthetics and corrosion protection. Anodising Electrolytic oxidation – also known as anodising – is an electrochemical process: the surface of the aluminium is converted into aluminium oxide from the inside out. This oxide layer is solidly attached to the base material; to use a metaphor, it “gets under its skin”. An accurate topographical copy of the original structure is created, and the surface retains its metallic look. With the multitude of anodising procedures offered by BWB, it is possible to produce oxide layers with very different properties. Thus, procedurespecific oxide layers with different thicknesses and colours can be manufactured to satisfy the respective requirements. Sealing With electrochemically produced oxide layers, the pores of the oxide layer are closed in a subsequent operation. This makes it very difficult for foreign matter, such as dust or dirt, to adhere to the surface, and causes the surface to become tackfree. Before sealing, adsorbed chromophoric materials are embedded and fixed within the oxide layer. The wellsealed oxide layer is enormously important for a topquality surface on the work piece (weather resistance, etc.). For this reason, sealing is monitored in a correspondingly strict manner. BWB offers the following electrolytic surface conversion procedures for architecture and design: • Anodising / electrolytic oxidation • Permalux colour hard anodising • Colouration – Sanodal – Bronze – Sandalor – Colinal – Spectrocolor
Page 1 and 2: SURFACE TREATMENT ENgINEERINg FOR A
Page 3: The BWB anodising procedures (elect
Page 7 and 8: A clean surface on the work piece i
Page 9 and 10: As a designer or planner, your requ
Page 11 and 12: BWB Permalux P4 BWB Colinal 3175 BW

Machining and finishing of aluminium - BWB

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