<>Galver Srl
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ABOUT | CONTACTS

Via Anime Sante SNC 03023 - Ceccano (FR)

TELEPHONE: +39 0775.600948

​FAX: +39 0775.623149

EMAIL: info@galversrl.it

VAT number 02882860600

System for galvanic treatments
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Galvanic Treatments

Galver srl introduced in 2014 a system for galvanic treatments in preparation for bonding aeronautical parts. The system, fully automated and consisting of 15 tanks plus a drying oven, allows the management of production cycles by PLC, with constant control of process parameters such as temperature, immersion time and level of solutions in the tanks, ensuring full compliance with customer specifications. With useful dimensions of the tanks: 1500x700xh800, it is possible to carry out the chemical attack processes listed below.

Degreasing in the vapor phase

 

Galver Srl has a steam phase degreasing machine (preliminary phase of each galvanic treatment). The solvent used is perchlorethylene conforming to ASTM D4376 and the useful dimensions of the piece-holder basket are 1500 x 500 x h500.

 

Sulfuric acid and sodium dichromate of Aluminum attackcand its alloys

 

The  sulfuric acid and sodium dichromate attack removes the flakes and oxides from the aluminum surfaces. It is a treatment used for the deoxidation of aluminum surfaces that must be subsequently glued or coated with a substrate for adhesive (primer). The alloys treated are: 2014 - 2024 - 5056 - 5086 - 6013 - 7050 - 7075 - 7475.

 

Sulfuric acid pickling of 300 series stainless steel

 

Thanks to the high content of chromium in alloy, stainless steels spontaneously cover themselves with a layer of chromium oxide, very thin, compact, transparent and adherent to the surface: this layer preserves stainless steels from the aggression of the surrounding environment and guarantees their corrosion resistance. However, in order for the passivation mechanism to occur and remain stable over time, the surface condition of the steel must be free from any element that could hinder or delay its ignition.

 

 

This is the case of welding oxides or oxides due to thermal alterations, contaminating substances (for example particles deriving from other metallic materials), various types of dirt (greases, oils etc...), which can come from the technological cycle of the processes to which the base material has been subjected to arrive at the finished component, or more simply, can depend on bad handling or storage. In order for the stainless steel product to fully guarantee the anti-corrosive properties, its surface must be properly cleaned and prepared to carry out the passivation properties in the best possible way.

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Surface oxide layer remotion

The sulfuric acid pickling treatment aims to remove the surface oxide layer, or other contaminants, while increasing the porosity of the treated surface and promoting adhesion. 300 series steels that can be treated are: 301, 302, 316, 321 and 347.

Wet sandblasting

 

The wet sandblasting technology involves the use of water as a component or as a vehicle to bring the abrasive particles against the surface to be treated, thus eliminating the formation of dust that develops during the impact. This type of sandblasting consists in directing an air-abrasive-water mixture on the surface to be treated: the action of the abrasive material thoroughly cleans the metal surfaces by removing all the lamination flakes and impurities present. In addition to a cleaning action on the metal surface, sandblasting modifies the surface roughness, eliminates the irregularities that derive from the primary production processes, increasing the surface area of ​​subsequent bonding and thus favors adhesion. Galver has a shot blasting machine with useful dimensions of the cabin 990 x 990 x h1100. It is possible to treat aluminum, copper, nickel, stainless steel 300 series alloys.

Dry sandblasting

 

The dry sandblasting treatment consists in blowing a jet of abrasive material (aluminum oxide or quartz) at controlled pressure against the surface to be cleaned, so as to prepare the same surface for subsequent painting or the application of a protective treatment. The dry abrasive jet can be used to prepare stainless steel series 300, 400, A286, PH and carbon steel.

 

Anodic oxidation (sealed and unsealed)

 

The anodic oxidation treatment is an electrochemical process aimed at creating a stable layer of oxide on the surface of aluminum and aluminum alloy parts. The parts to be treated are immersed in an acid solution where, through a passage of direct current, the oxygen that develops, combines with the aluminum atoms to form a controlled growth oxide layer. The type of electrolyte, in addition to the process conditions, determines the properties of the anodic layer, and in particular its porosity. Galver Srl can perform the unsealed anodic oxidation treatment with chromic acid, and, if required, is also able to seal the porosity of the oxide layer by means of appropriate post-treatment. The anodic coatings are made for one or more of the following purposes:

 

  • Improve resistance to corrosion;
  • Improve resistance to wear and abrasion;
  • Increase in the adhesive capacity of the surfaces;
  • Improve the workability of some critical alloys;

 

Chemical conversion treatment of chromation of aluminum alloys

 

This treatment allows to improve the corrosion resistance and the adhesion properties of the paint to aluminum and its alloys. It can be used on internal surfaces, where the application of an organic finish is not necessary or feasible, or to repair damaged anodic coatings.

As a rule, light coatings are used where electrical continuity is required. The product used is Bonderite M-CR 1200S Aero (ex Alodine 1200S) and the application can be carried out in two ways:

 

  • Brush or cloth (localized application);
  • Immersion (four tanks of the galvanic line are dedicated to preliminary deoxidation and to the conversion treatment of the details).
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