Application: Aluminium anticorrosive surface treatment of columns.
Application: An automatic line for aluminium anticorrosive surface treatment of columns.
Before zinc (aluminium) plasma spraying with electro-arc sprayer, the surface of the treated components must be clear of all grease and oil, and it must be jetted to reach the surface cleanliness Sa 2.5 to 3 (Sa 3), following the ČSN ISO 8501.
So that a quality zinc (aluminium) coating of ca 100 um can be retained, the jetted surface should have the surface roughness of Ramin. = 4 mm – we recommend 10 mm (Ramin. = 6 mm – we recommend 12 mm ) and Rmmin.= 25 mm – we recommend 60 mm (Rmmin.= 35 mm – we recommend 80 mm).
The above mentioned roughness figures can only be accomplished when jetting with angular grain abrasive.
|Spraying pistol (without the electromotor)||0,85|
|Spraying pistol electromotor||0,95|
|Standard wire set (9 m long)||10|
|Extended wire set (14 m long)||15,50|
|Total equipment weight||180|
Electro-metallizing source – size [mm]
|Power supply||400V/50-60 Hz|
|Electric input||11,8 kW|
|Power consumption||4 kW/h|
|Maximum short-period load||450V|
|Compressed air (consumption, pressure)||80 m3/h, 6 bar|
|Electro-metallizing source cooling||Forced by compressed air|
|Compressed air cleaning||Automatic decantation cleaner|
Wires for spraying
|Number of wires||2|
|Wire diameter||2 mm, resp. 2,5mm (na objednávku)|
|Sprayed metals||Zn, ZnAl, Al, Cu, mosaz|
|Power setting on the panel scale||1||2||3||4||5||6||7||8|
|Zn dráty, diameter 2mm [kg/hod]||6||9||12||14||16||19||22||26|
|ZnAl, diameter 2mm [kg/hod]||5||7||10||11||13||16||18||21|
Two electrically conductive wires, between which an electric arc burns, are melted. The melted metal is sprayed (by compressed air in a jet) towards the surface of a sprayed product (the sprayed surface must be pre-treated by jetting).
The equipment is especially intended for anticorrosive Zn, Zn Al, and Al coating, but it can also be used for decorative or functional coating (steel, Cu, bronze, brass, etc.). Commonly, 2 mm wire diameter is used; if ordered, it is possible to deliver equipment for using wires with 1.6 or 2.5 mm diameters. Standard length of connecting cables is 9 m; if ordered, the connecting cable can be 14 m long (without the connecting unit).
Advantages of electro-metallizing
Compared to the gas process (using acetylene or propane), the running costs can be up to 90% lower. The spraying performance is several times higher. Current relation of prices offers an investment return for spraying 3,100 kg Zn (or 2,300 kg Zn Al, 1,200 kg Al) for acetylene spraying or 5,000 kg Zn (or 3,700 kg Zn Al, 2,600 kg Al) for propane spraying.
High quality coating and operating reliability of the equipment are standard. Detailed information can be obtained on requesting a price offer.
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