Aluminium 1100 flanges may be easily welded using various welding processes, including TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), and resistance welding. Their low strength and excellent flexibility make them ideal for welding, resulting in strong and lasting connections. However, suitable welding processes and techniques must be used to achieve quality welds and prevent problems like porosity and cracking.

Aluminium 1100 flanges can be finished in various ways to suit individual needs and aesthetics. Joint surface finishes include mill finish, the untreated surface that comes straight from the manufacturing process and brushed finish, which is created by brushing the surface with abrasive materials to produce a directed pattern. Aluminum 1100 flanges can also be anodised or powder coated to improve corrosion resistance and color possibilities.

To avoid galvanic corrosion while utilizing Aluminium 1100 flanges with other metals, avoid direct contact between dissimilar metals. This can be accomplished by placing insulating gaskets or coatings between the touching surfaces. Furthermore, choosing suitable metals or using cathodic protection measures can help reduce galvanic corrosion hazards in mixed-metal systems using Aluminium 1100 flanges. Regular inspection and maintenance are also required to quickly identify and solve any possible corrosion concerns.