The Collini Group specialises in the finishing of base materials by coating: galvanising, anodising, hot-dip galvanising and powder coating – in short, the entire range of surface coating processes. With more than 60 fully automated coating systems, Collini offers the highest performance and flexibility in production.
Our broad technology portfolio includes a wide variety of system types, and depending on requirements, includes standard layers or customised solutions. Metals and engineering plastics are mainly coated in industrial mass production. Single and special quantities are also possible.
Galvanising is an electrolytic process. In the galvanising process, metal is usually deposited from metal salt solutions using a current source and chemical aids. Galvanising is an electrochemical process for refining the base material (e.g., nickel plating, chrome plating, gold plating, etc.).
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Eloxal is an abbreviation and stands for electrolytic oxidation of aluminium. Anodising usually works through the use of direct current in sulphuric acid or oxalic acid electrolytes. The aluminium is thereby switched as an anode, so the method is also known as "anodising".
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The process of hot-dip galvanising is simple, but the metallurgical processes used during the process are very complex. In hot-dip galvanising, steel parts are immersed in molten zinc. The thermal reaction between iron and zinc produces a solid and durable zinc layer that is permanently bonded to the base material, which protects the steel from corrosion.
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Powder coating is a painting process in which electrostatically charged paint powder particles are attracted to the metal surface. The curing process at approx. 200° Celsius results in a resistant paint layer that is approx. 80 µ thick. The appearance can be influenced by a variety of colours, textures and special effects.
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