Powder and CDP

Processes

Organic coating

Painting technology is one of the most widespread and traditional surface treatments in industry. The continuous development of the technology over decades has led to a variety of completely different application techniques.

Collini primarily focusses on powder coating and cataphoresis (CDP) – a proven combination in the automotive industry. The design options in terms of colour, structure and gloss are limitless, while also providing optimal corrosion protection. In combination with hot-dip galvanising, powder coating provides maximum corrosion protection with many design options.

Inquiry Technical data

Advantage

Advantages at a glance

Corrosion - Surface protects.
The natural state of metals is an oxide. In the metalworks the oxide is extracted by using oxygen and energy and the pure metal is obtained. However, the metal is “predestined” to return to its original state at exposure to oxygen and water. And the less precious the metal is, the faster it happens. That is corrosion.

Surface technology slows down or prevents this corrosion process. Protection against corrosion through innovative surface technology increases service-life and thus raises the value of the product or structural component. Collini provides numerous possibilities to combat corrosion.

By means of electro-plating, structural components can be protected against corrosion with suitable metal coatings.

Powder coatings form impenetrable barriers against oxygen and water and thus protecting the underlying structure.

Hot-dip galvanising protects steel parts by specifically inducing the corrosion process on the zinc surface. And only there!
Medical - Surface helps to heal.

Medicine is the science of prevention, recognition and treatment of diseases and injuries with only one goal: the preservation or recovery of the best possible health of man and animal. To make this possible, surface technology has become indispensable. In analytics, ultra pure, non-magnetic, metal surfaces provide the highest precision (e.g. magnetic resonance spectroscopy).
In the field of traumatology, Collini anodises titanium implants used in surgical treatment of fractures and deformations.
Antistatic powder coatings from Collini can easily generate purifying surfaces that comply with the hygienic requirements of many medical devices and facilities.
Design - Surface creates.
Collini surface technology makes it possible to create products in such a way that they appeal to the varying aesthetic requirements and wishes of consumers. Design is more than the form and functionality of an object. In many cases, it is the aesthetics that adds to the value. The look, colour or structure of identical materials can be changed through different surfaces.

Powder coatings with its almost infinite possibilities in terms of colouring, degrees of glossiness and structures give products their true character. It is irrelevant whether it concerns machine cladding, vehicle components or architectural design elements.

High quality metal surfaces can be created with electroplating, the properties of which distinguish it clearly from that of the base material. Hence, products are refined and the required effects in finish and structure of the respective product
are created.

Hot-dip galvanised structural components with its crystalsilver surfaces are, besides the corrosion protection, often specifically included as design elements.

Technical data

	CDP	Powder
Processes	Electrochemical dipping method, also known as cathodic dip coating (CDP) or "cataphoresis"	Powder coating (electrostatically sprayed)
Coating colour	black	Wide colour spectrum (RAL, NCS, metallic)
Base material	Steel, galvanised steel, stainless steel, aluminium, grey cast iron, die-cast aluminium	Steel, galvanised steel, stainless steel, aluminium, grey cast iron, die-cast aluminium
Corrosion protection	up to 1000 h NSST	up to 1000 h NSST
Hardness	Hardness >/= 80 per Buchholz	Hardness >/= 80 per Buchholz
Temperature resistance	-30 °C to +110 °C	-30 °C to +110 °C
System technology	Frame	Corona
Conformity	RoHS, REACH, 2000/53/EC (End of life vehicle)	RoHS, REACH, 2000/53/EC (End of life vehicle)
Execution	optional sandblasting, CDP with subsequent powder coating	optional sandblasting and/or CDP primer
From our R&D	>/= 80 per Buchholz	>/= 80 per Buchholz
Protective properties	Protection against corrosion, chemical influences	Protection against corrosion, chemical influences, UV rays, high weather resistance
Functional properties	Sliding properties, very good mechanical properties	Sliding properties, very good mechanical properties
Decorative properties	Uniform appearance, no dripping	Wide variety of colours (RAL, NCS, metallic), gloss level from matt to silky gloss to high gloss, smooth surface finish, fine structure or coarse texture can be achieved
Special properties	Uniform layer, which is ideal as a primer for coating with powder or wet paint

Details

Typical components & applications

Typical components

Cover panels, switch cabinets, control panels, safety components, ventilation hoods, driver's cabs, crane superstructures, cover plates, undercarriage parts, chassis parts, motorcycle frames, cladding, engine parts, gear parts, holding and mounting plates, attachment parts, ventilation grills

Industrial applications

Mechanical engineering, commercial vehicles, recreational vehicles and two-wheelers, agriculture, biomass

Collini product portfolio

Cathodic dip painting

In CDP, the metal parts are dipped in thin-film lacquer, whereby the lacquer particles are applied evenly by electrostatic charge up to a layer thickness of around 25 µm and then baked at temperatures of approximately 180 °C. CDP is the perfect combination of corrosion protection, quality, economy and environmental friendliness. The coating is fully automatic and even, with no drips or traces of wear. Good edge coverage and coating of undercuts is very easy to achieve because the dip lacquer is very thin and can easily penetrate anywhere.

Powder coating

The powder particles, which are electrostatically charged in the powder gun, are blown onto the workpiece during powder coating. The workpiece is grounded so that there is a force of attraction, which makes the colour particles adhere. In the curing oven, they fuse at approx. 200 °C into a homogeneous, resistant powder coating layer (approx. 80 µm thick lacquer layer). The hardening or cross-linking that matches the component results in a perfect coating in terms of mechanical and chemical resistance. By selecting the appropriate type of powder, UV stability can be influenced. The colour hue, surface structures and gloss levels can be freely selected. The gradations from a smooth to a fine to a coarse structure have an influence on the tactile sensation, while the gloss levels, from high gloss to dull matt, complement the desired visual impression. Special effects, such as metallic, hammered or glaze effects complete the extensive range of design options.