Surface treatment

Surface treatment

1. Powder coating

We can offer powder coating with all RAL chart colours and shades. In addition, we can apply also special finishes : matt, gloss, semi-gloss, textured, metallic, hammered – according to the client needs. In 2015 we have bought a new technology for powder coating, degreasing and final colour finish.

Our company offers a curing oven of unique dimensions for coating parts of sizes up to: 550cm x 110cm x 170 cm and 640cm x 190cm x 295cm.

Powder coating has no competition regarding the quality of surface treatment. It is one of the newest technologies for surface treatment which meets the strict requirement of the environments but also provides the best surface quality for the metal parts. Powder coatings are based on polymer resin systems, combined with curatives, pigments, leveling agents, flow modifiers, and other additives. These ingredients are melt mixed, cooled, and ground into a uniform powder. A process called electrostatic spray deposition is used to achieve the application of the powder coating to a metal. Powder coated products are more resistant to diminished coating quality as a result of impact, moisture, chemicals, utraviolet light, and other extreme weather conditions. In turn, this reduces the risk of scratches, chipping, abrasions, corrosion, fading, and other wear issues. Moreover, it's tough, looks great and lasts a long time.

2. Surface treatments before powder coating

In this area we can offer:

  • Blasting
  • Degreasing and phosphating

Surface treatmentBlasting of the surface before powder coating ensures excellent results. It improves most parameters of the coating such as adhesiveness, mechanical resistance, possibility of further layers. In addition, phosphating creates an insoluble phosphate layer on the surface of product and the surface obtains very good cohesiveness with base metal and it is suitable as a subgrade layer before varnishing.

Powder coating

Powder coating

Powder spray coating, also known as komaxit, is one of our core operations. It is done by means of an automatic or manual painting booth and a curing oven. We use a wide range of RAL paints to be applied and many special tones.

Our company offers a curing oven of unique dimensions for coating parts of sizes up to: 550cm x 110cm x 170 cm

You can choose from all colours and shades of standard RAL chart. We can apply all types of powder coatings: epoxy coatings, epoxy polyester coatings, polyester coatings, polyurethane coatings, acrylic coatings. The paint finish may have the following texture: matt, gloss, semi-gloss, textured, metallic, hammered.

Powder coating is one of the newest technologies for surface treatment which meets the strict requirement of the environments but also provides the best surface quality for the metal parts. One of the requirements in order to obtain maximum quality after powder coating is well prepared surface, meaning, qualitative degreasing, blasting etc. Upon the application of the powder coat, the parts are cured in an oven from 180 do 210°C.

Our automated powder coated line is built so as to provide the best results not only for big series of products but also smaller ones. Our advantage is in the possibility to coat several different types of coatings during the day and hence, meeting your tight deadlines. For further information, do not hesitate to consult with us.

Blasting

Blasting

High pressure blasting is another surface treatment that prepares the parts for further operations such as varnishing or galvanizing. We use three different blasting cabins with sizes 250cm x 100 cm x 100cm and one automated revolving blasting machine, mostly used for a series of parts.

It is possible to blast profiles of up to 6m. For the best quality we use various abrasives e.g. corundum, garnet, steel granulate, anti-corrosion granulate, ballotine, plastic. Therefore, we can blast black steel, aluminum, stainless steel depending on your requirements and the final surface treatment that is expecting the material.

Blasting of the surface before powder coating ensures excellent results. It improves most parameters of the coating such as adhesiveness, mechanical resistance, possibility of further layers.

We can blast the following and many other priducts:

  • metal sheets, profiles, tubes
  • frames of motorcycles, bicycles etc
  • steel constructions
  • parts of transportation machines
  • electrical boards
  • banisters
  • staircases, fences
  • poles and poles
  • flanges, consoles etc.

In the metal works industry is blasting also used for:

  • cleaning old products from rust
  • surface treatment before renewing antique parts and their paint

Phosphating

Phosphating

Phosphating is one of the most preferred surface treatments before paint. This coating method creates an insoluble phosphate layer on the surface of product. Therefore, the surface obtains very good cohesiveness with base metal and it is suitable as a subgrade layer before varnishing. We use this technology to treat steel components but also aluminum and other metals.

We offer to our clients a technology for phosphating which uses a fully automated chambers, with a sprinkling system that follows these steps:

  • heated bath – for degreasing purpose
  • heated bath – phosphate
  • heated bath – rinsing / demi-water rinsing

For more information do not hesitate to contact us.

Deburring and brushing
Broušení

Deburring and brushing is one of the most cost inefficient mechanical operations. Therefore, it is chosen to be applied when the client has strict quality requirements. A machine for deburring and the final treatment used to remove burrs on burnouts cut by plasma, oxidation films on burnouts cut by laser removes burrs on snippets and moldings.

In general, brushing starts from a rougher surface to a finer one, using:

  • grinding unit with the abrasive belt - removes burrs and rounds off the edges
  • planetary disc scrubbing unit with plate or other brushes - rounds off the edges, creating radius
  • brushing unit of grinding fleece - cleans and prepolishes surface material

Depending on the size of the parts we can use a special deburring automated machine, which can reach high quality and uniform deburring of all edges.

In general, brushing starts from a rougher surface to a finer one, using:

  • the maximum width of the part can be 1300mm
  • it is possible to brush also aluminum, stainless steel with film and zincked steel
  • we can also automatically center the abrasive belt
  • digital control the thickness
  • speed of brushing

The purpose of these mechanical operations is:

  • to create a surface that corresponds to the requirements of our clients
  • to prepare the parts for maximum adhesiveness of the galvanic layers and paints

Acid pickling

A qualitative surface treatment is the basis for products that are going to be exposed to aggressive environmental conditions. Therefore, KLEMAT CZ s.r.o. also has a modern acid pickling link for stainless and aluminum steel treatment.

Our technology has:

  • acid pickling and passivation of stainless and aluminum alloys
  • electro-chemical polishing of stainless steel
  • blasting of stainless steel, black steel and aluminum alloys

These types od surface treatments are used not only for our production but also to meets the needs of our customers.

Acid pickling and passivation increases the anti-corrosion qualities of the products. Without this surface treatment there can be rots in the places where the parts are welded. During this process the material is also cleaned up from the previous paint remains, markings and signs.

Methods used for pickling

  • dip
  • pickling results are in accordance with the highest requirements imposed on these processes
Technical parameters of the technology Length (m) Width (m) Height (m)
Draft measurements 2,7 2,0 1,5

Wet Varnishing Process

Wet Varnishing Process

This technology is a novelty for us, and it is to extend and strengthen the portfolio of services that our company offers in the field of metal surface treatment and pre-treatments by blasting, pickling and polishing.

The technology requires an application booth for the wet varnishing process, including a programmable drying and hardening process directly in the cabin to maintain the highest possible quality of the surface treatment. The drying process runs through a waste -heat exchanger with the aid of a co-generation unit, which is part of the equipment.

  • The booth offers varnishing and drying
  • Varnishing temperature: 20-25°
  • Drying temperature: 60-80°
  • Length: 8500 mm
  • Width: 4500 mm
  • Height: 3000 mm
  • Flow rate: 44000 m3/h
  • Heating for drying booth – through exchanger and co-generation unit