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Increased resistance to high temperatures
Increased resistance to chemical aggressors
Increased resistance during transport and storage
Increased efficiency and performance

Eco HPC Plus
Ecological High Performance Coating

Eco HPC is the brand which distinguishes the most important achievement in treatments for coating filter sleeve cages.
Drawing on CleanAir’s know-how and experience in the filtration sector, continual research into new and more effective solutions has led to the development of a low environmental impact treatment specifically formulated for the finishing and protection of filter sleeve cages.
The Eco HPC process is an electrocoating treatment which gives resistance and durability, applied with a completely automated system which is monitored at every stage, to ensure consistent quality in the end product.

Filter sleeve cages treated with Eco HPC coatings guarantee:

  • Excellent resistance in storage and installation at clients’ premises;
  • excellent resistance once installed and subject to external agents;
  • absence of the typical phenomenon of abrasion of the filter sleeves;
  • excellent mechanical resistance of the electrocoating;
  • excellent resistance to vibration and rubbing.

Correct, long-lasting filtration depends on the reliability, quality and durability of the filter sleeve supports.

CleanAir’s Eco HPC treatment becomes an integral part of the value chain of the filtration process, contributing to improve the quality and life span of the system’s correct functioning.

Electrocoating is the evolution of the Eco HPC process

The electrocoating process is a surface treatment which can give carbon steel elements considerable resistance to corrosion; it consists of a homogeneous deposit of an epoxy resin on the surface of the metal; this ensures extraordinary long-term protection from chemical agents and other types of aggression.

Eco HPC Plus: the quest for improved resistance with lower environmental impact

The Eco HPC process is a surface treatment which can give filter sleeve supports unprecedented resistance to corrosion. The CleanAir experience in this type of process is the result of being the first company in the sector to introduce electrocoating into its production cycle; the company has created an in-house division specifically dedicated to this type of treatment.

The Eco HPC treatment consists of a uniform deposit of an epoxy resin which adheres to the filter sleeve support as a true chemical bond, ensuring a degree of protection which is intrinsic rather than merely superficial, homogeneous over the entire surface and effective in the long term against atmospheric, chemical and physical agents.
This treatment guarantees greater protection from rust and prevents oxidation spreading under the paint, as the latter is chemically bonded to the metal material.

Electrocoating is a treatment that gives filter sleeve cages greater resistance to atmospheric agents, particularly in cases where the atmosphere is made more challenging by the constant presence of damp, heat and salts; cathodic electrodeposition allows chemical resistance to reach values 50% higher than traditional anodic systems; the mechanical properties of the resulting protective film are also substantially improved.

CleanAir’s Eco HPC treatment is carried out exclusively on filter sleeve supports and their accessories, allowing a highly homogeneous thickness of coating to be achieved, even in areas of the cage which are difficult to reach, ensuring all-over protection against corrosion, even under extreme temperature and pressure conditions.

A secondary advantage obtained from the Eco HPC treatment is the elimination of the annoying sticking effect, where the filter sleeve adheres to the metal support, greatly increasing time and difficulty for replacement.

Eco HPC Plus: a low environmental impact treatment

In the EcoHPC process the substance to be deposited is hydrodispersed, in other words the paint is dissolved in water rather than chemical solvents; the process therefore has a low environmental impact. Used solvent is in fact a toxic and harmful waste product, while in the Eco HPC process the excess paint is sent back into the circuit and re-used instead of going straight to the depuration stage, with the clear advantage of eliminating the risk of dispersal of pollutants.

Treatment Eco HPC Plus

We are using this coating system since 2009 with excellent results in several fields (cement, aluminum , incinerates, biomass, power plants, steel) and we have made several big projects with customers as Alstom Power, Siemens VAI Metals Technologies GmbH, Scheuch, Gea, LAB..etc.

Here under you can find a quick explication of our process Eco-Hpc coating that can resist to C250° continuos temperature and there are any problems of sticking with the bags. Consider that before the coating separates from the mild steel we have to reach C600°.

1) we clean and degrease the cage in different tanks with the nanotechnology with water and sodium at a temperature of 50 C for around 15 minutes

2) we eliminate the residues from the surface in two steps by dipping the cages in several tanks with demineralized water and nanotechnology:

– water with ambient temperature
– electrical conductance <50
– sodium hydroxide solution at 30%
– hydrochloride acid

3) electrolytical painting composed by:

– 10% of pigment paste and resin of epoxy all in demineralized water
– temperature of the emulsion 27/28 C
– electricity voltage 380 V

4) final cleaning of the cage with the coating with washing and rinsing in several tanks for 5 minutes and draining for 8 minutes

5) drying the paint in hoven at 180C for around 20 minutes.

6) the cages it’s directly placed in the crates ready for loading.

Test in salt chamber (ASTM B 117 Standard) 136 hours

Pre-treated and with black thermoset powder painted cage

Thickness 50 µ

Test duration 136 hours
Penetration on cross notch with loss of adhesion on the film. Unchanged on the rest. Development of oxide on some welding points.



Pre-galvanized cage

Thickness: –

Test duration 136 hours
Development of rust with exuding of red and white oxide.



Electro-galvanized cage

Thickness: –

Test duration 136 hours
Development of rust with exuding of red and white oxide.



Eco HPC  coated grid

Thickness: –

Test duration 136 hours



Pre-galvanized grid

Thickness: –

Test duration 136 hours
Development of rust with exuding of red and white oxide.



Test in salt chamber (ASTM B 117 Standard) 1249 hours

Eco HPC  coated cage

Thickness: 16 µ

Test duration 1249 hours
Development of some rust points at the welds.
Several blistering points on the field.
Regular penetration on the cross notch for 2 mm.
Corrosion with perforation of the metal sheet in the cross notch on the disk.




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