Before aluminum alloy welding, before welding should be carefully eradicated workpiece weld mouth and wire appearance of the oxide film and oil, aluminum in the air and oxygen action, in the aluminum sheet/plate surface production of a very thin layer of dense natural oxide film, than other metal oxide film generated fast and thick much, and thus prevent the air in the harmful gas and moisture further corrosion, played a role in protecting the aluminum plate, but affect the aluminum plate selding, eradication quality directly affects the quality of welding technology and joints, such as the tendency of weld porosity and mechanical properties.

In shipbuilding, 4×8 aluminum sheet or 5×10 aluminum sheet are usually purchased, cut and bent, and then welded. 

Thick heavy duty aluminum foil is our new products.

Chemical cleaning and mechanical finishing are often used in two ways. 

1) Chemical cleaning. Chemical cleaning is highly efficient, stable quality, suitable for finishing welding wire and scale is not large, batch production of workpieces. 

2) In the workpiece scale is large, long production cycle, multi-layer welding or chemical cleaning and then stained, often choose mechanical finishing. Alternatively, scrapers, files, etc. can be used to organize the appearance to be welded.