Corrosion protection coatings
HÜNI + CO offers a wide range of different corrosion protection coatings to ensure the best possible protection against corrosion damage tailored to your individual application. In addition to chemical resistance as the main function of passive corrosion protection, our coatings such as our registered brands ChemLINE 784®, PROCO–EMAIL® and Proco - Plastic Coatings® also fulfil other requirements such as anti-adhesiveness, food conformity, temperature resistance, wear resistance or electrical conductivity.
In addition, different colours can also be produced to meet your individual requirements.
Plastic coatings for the industry
From A for apparatus engineering to Z for dental technology and from A for armature to Z for rotary valve.
We work closely with customers from almost all technical and industrial sectors and incorporate our knowledge and experience across all industries into our consulting services in order to find the optimum surface solution for you.
We see ourselves as consultants and optimisers and support you in your industrial value creation process.
The areas of application and potential of our Proco Plastic Coatings® are as diverse and broadly diversified as the industries in which we operate. With our Proco non-stick and anti-friction coatings, for example, we achieve significant improvements in your production process:
- Easier cleaning
- Shorter machine service life
- Easier demoulding
- Reduction in the use of release agents
- reduced wear.
Our Proco anti-corrosion coatings are used wherever chemical attacks on the substrate need to be prevented. For example, when transporting class 8 hazardous substances. However, functions such as anti-adhesiveness, food conformity, temperature resistance, wear resistance and electrical conductivity can also be achieved with our Proco anti-corrosion coatings.
Our capacities
In three separate production halls, we have eleven coating systems with stoving and sintering ovens of different sizes, which can cover a maximum temperature range of up to 500°C, for coating your workpieces.
Pre-treatment
SANDBLASTING
Sandblasting is the pre-treatment of the surface of a workpiece by using sand (corundum) as an abrasive to remove rust, dirt, old coatings, paint and other impurities. This process is used to optimise the pre-treatment of the workpiece for the coating process. The abrasive, in this case corundum, is applied to the surface to be treated under high pressure via a special hose and nozzle system. Due to the abrasive effect of the corundum, parts of the surface are loosened and ultimately removed, resulting in a clean surface. Hüni+Co has various blasting systems on which we can process workpieces of up to 10 metres in length with corundum of various grain sizes for you. Blasting with corundum according to DIN EN 12944-4
GLASS BEAD BLASTING
Glass bead blasting is a similar method of pretreating the surface of a workpiece to blasting with sand or corundum. However, small glass beads are used here, which are significantly finer and therefore produce a finer surface. The special thing about glass bead blasting is that it achieves a plastic deformation, which creates the desired internal stress in the workpiece and thus significantly increases the fatigue strength. This is why it is often referred to as shot peening. With glass bead blasting, the surface is less roughened than when blasting with sand or corundum. The more filigree the glass beads, the finer the surface structure, right up to a polishing effect.
DECOATING USING THE PYROLYSIS PROCESS
Pyrolysis is a pyrolytic decomposition process. In a thermal process, without the addition of oxygen, chemical compounds are broken down; large molecules are converted into small molecules. Colloquially, pyrolysis also means burning or incineration. In the case of plastics, the matrix is destroyed and they disintegrate. In coating technology, pyrolysis is an upstream process when workpieces with an old coating are refurbished, i.e. recoated. We offer pyrolysis as a possible decoating process for the pre-treatment of your workpieces.
THERMAL DEGREASING
A grease-free surface is an essential condition for the substrate adhesion of coatings and other surface finishes. In addition to chemical degreasing, thermal degreasing is also used for this purpose. Substances such as oils and greases burn at high heat during thermal degreasing. The residues produced during the process would reduce the substrate adhesion of a coating and are therefore removed, e.g. by radiation.