Arehouse Material Acceptance

  • Check the outside of the neck to verify its integrity and therefore do not damage it.
  • Verification of total gross weight.

Packaging And Mechanical Pre-Treatment

  •  Numerical control and possible defects in the material to be machined.

Aggancy At The Plan

  • Control of the pre-machined surface mechanically.

Anodical Oxidation

  • Opacity / shine control of the pre-treated surface chemically.
  • Measure the thickness of the anode film.
  • Visual color fidelity control.


  • Checking the parameters of the chemical baths (concentration, pH and temperature).
  •  Test the drop for the fastening quality. *
  • Weight loss test for fastening quality (UNI EN 12373-7). *
  •   Abrasion resistance test (Clark Test / BS 6161).


  • Visual inspection to check for any non-conformities (color, squeeze, dents).
  • Color control with Spectrophotometer. *
  • Gloss Control with Gloss Meter. *
  • Checking the thickness of the anode film with Micrometer. *
  • Check the number of pieces and net / gross weight.

Grosse Commesse

  • On request and only on large orders, NECE anodizing can also perform raw roughness control of raw material, dimensional, thickness and planarity of the profiles.

Working Cycle

The working cycle to which the material to be anodized is carried out through certain sequences that we will list below.

The material is moved and discharged by electric lateral forklifts, later stored in cantilever. Subsequently the material is first checked in terms of: total weight, number and integrity of packages. At work, it is taken from the cantilever and moved to special trolleys by means of forklifts that transport them to the brushing area.

Here, job operators manually discard the material and carry out a detailed check on it by shutting down any broken or defective profiles in the management system.

Anodic Oxidation – clean with steel and water brushesThe material is then machined according to the finishes: standard brushing (brushed automatically with 6 headed SPAL brushing machine and 6 heads above). Brushes in steel and water allow for a clean surface, brushed scotch brite (automatic brushing at dry scotch brite bristles), sandblasting (automatic 8-turbine sandblaster using stainless steel microspheres, and 360 ° machining), chemical finishing (pre-treatment prior to anodizing).

Subsequently the pre-treated material is fixed to the supports to be ready for anodizing. Following the identification of the bathroom required by the customer, (color) begins the oxidation phase. The advantages are to have 4 perfectly homogeneous oxide tanks (concentration, aluminum, temperature). The oxidation times range from 60 to 90 minutes depending on the finish type and the desired micron.

Following the bath, color and ddt packing list, which is paid to the customer, begins the oxidation phase.

  • degreasing
  • anodic oxidation

At this stage, a third, important, check of the thickness of the oxide layer is performed.

SILVER (NATURAL) OXIDATION: After several washing, the material passes directly into the cold fixing tank at 30 ° C and then passes into the hot water tank or directly into hot fixation.

Anodic Oxidation – Aluminum Coloring

Anodicum Aluminum Coloration

After the anodic oxidation in sequence with regard to the BRONZO colors, the passages in the tanks follow in succession:

  • rinse
  • bicarbonate
  • risciacquo
  • cobalt acetate
  • permanganate

Anodic Oxidation – Electrolytic Tanks

More steps are made, more color intensifies by acquiring darker gradations. After reaching the desired or predetermined color with the passage in the cold fixing tank and in hot aging, the operating cycle ends.

For ELECTRO colors, after the degreasing and anodic oxidation, the material is immersed in the electrolyte tub, which allows the electrocolouring (as required sample) starting from light bronze until it reaches black working on light – dark; then finish with the passage in the cold fixing tank and in hot aging; or directly into the hot fixation tank.

Anodic Oxidation – Interference Electrocoloration

For ELECTRO-INTERFACES colors after degreasing and anodic oxidation, the material is immersed in the electrolyte tub, which allows the electrocolouration to interference that in the first phase makes a pore modification and subsequently deposits the pond to reach the various colors such as: green, purple gray, brown, blue etc.

The substantial difference between electrocolouring and electrocolouring by interference is based not only on dark light variation but also on color variation. The phase ends with the passage in the cold-setting and hot aging tank; or directly into the hot fixation tank.

Anodic Oxidation – packing aluminum bars

For the Nero Organico coloring, a transition to an organic dye solution takes place at different times depending on the geometry of the material to be treated. The fixing phase follows.

The staining and microns, which are made in anodic oxidation, are controlled by special electronic equipment, as well as the entire production cycle is controlled by a timer system.

The packaging, which ends the working cycle, is carried out automatically with the application of microphorous propylene and stored on the cantilever.Depending on the customer’s request, the packaging is also available in micro-perforated nylon with the NECE spa or neutral letter, or with nylon leaf placed or interposed; polyethylene or iron racing with or without beams. The anodized material is then individually weighed and verified through procedures that guarantee its output quantity.