Functional chemistry

Pre-treatments

An essential step for ensuring the complete success of a galvanic treatment is the painstaking selection of the most efficient preparations for removing superficial contaminants. In many cases the cause of unsuccessful electrolytic coating can be ascribed to errors committed during the initial washing and degreasing of the pieces.

1) Chemical degreasing operations
These allow for removing oils and pastes via simple dipping of the items. They may require the use of ultrasonic systems.
2) Electrolytic degreasing operations
These make it possible to remove oils and pastes with an electric potential.
3) Pickling and activation
Products formulated to remove the fine layers of oxides and slag by chemical or electrochemical means.

Copper

The products in the CultraMet line produce extremely glossy copper deposits with a sulphate acid electrolyte. The levelling power is excellent, likewise the penetration. The copper deposits obtained in this way are ductile and very brilliant, with low internal tension and a good resistance to corrosion. The process is economical due to the working temperature, and the versatility and simplicity in processing the effluents.

Nickel

Electrolytic
The products in the NiLuxMet series, which offer operators the best possible solution for their different production needs when aimed at improving gloss and levelling the treated surfaces, and when their primary objective is to improve resistance to corrosion and wear of the items.
Satin-finish
The Nickel Satin process entails nickel-plating on a frame that produces uniformly opaque, decorative satin-finish deposits that come in a wide range of grades.
Nickel Satin produces anti-reflective surfaces with excellent resistance to abrasion and fingerprints. The deposit can subsequently be treated with other decorative finishes such as chrome, gold, silver, palladium, etc.
Chemical
For years recognised as the most suitable coating for meeting the needs of the most demanding industries, Chemical Nickel (or electroless) is used mainly for obtaining uniform, non-porous deposits offering a high resistance to corrosion.
It is characterised by the uniformity of the deposit thickness regardless of the geometry of the items processed.

POP

POP

Plating on Plastic. The products in the PlastiMet range used in the Plating On Plastic processes are specially designed for the metalizing of plastic materials (ABS, ABS/PP and PP). This cycle makes it possible for the tone, gloss, and colour to completely transform the plastic surfaces, exalting the machined item that can take on numerous more complex shapes. Lastly, the metallic surface layer of the plastic can be enhanced with high-quality decorative aesthetics.

Bronze

Over the years, VALMET's cutting-edge products have evolved in order to comply with the different regulations that first entailed the elimination of nickel from the surfaces of products intended for direct and prolonged contact with the skin, followed by the elimination of lead from inserts obtained with these processes.

The BroMet, Ice series with a white colour similar to silver, and Or in a yellow colour, are able to deposit perfectly glossy and bright ternary copper-tin-zinc alloys by means of electrodeposition on rack and barrel.

They can be used in the jewellery, watch-making, glasses-framing, fashion accessory and garment sectors, as well as in mechanical engineering, in the automotive and chemical industries and in the button and zip sectors.

Main performance features:

• High-speed, lead-free deposition;
• Exceptional uniformity of the alloy with a homogeneous deposit colour throughout the frame;
• Excellent thickness distribution;
• Brilliant white/yellow deposit;
• Hard deposit, resistant to wear and corrosion.

Chrome

This is the series of CroMet products marketed by VALMET for the thick deposition of hard, fluoride-free chrome at high speeds; processes for the deposition of trivalent chrome and black chrome, processes for the decorative chrome-plating that have their final use in the furnishing and decorative sectors, and the healthcare and automotive industries.

Zinc

The processes of the ZincoMet series allow for depositing pure zinc and zinc alloys from cyanide-free alkaline and acid baths. These processes ensure high performance in terms of penetration, deposition speed and brilliance. It is then possible to use sealants, passivations and top-coats to guarantee high resistance against saline corrosion. Available for processes on the on the frame or rack and barrel.

Brass

The electrodeposition of the copper-zinc alloy is carried out in cyanide-alkaline baths. With the products of the OttoMet line the deposits can be used as a finish directly on top of polished iron, or even better, on polished nickel-plated iron, otherwise they can be suitably treated and blackened for subsequent re-coatings for use in the production of garment accessories, handles, light fittings, toys, etc.

Tin Alloys

The Ice-AlloyMet and Black-AlloyMet series allow for depositing tin alloys ranging from white-blue to gunmetal grey for technical or decorative applications in the lighting and furniture sectors.