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Cost can be influenced by factors such as the complexity of the job, materials used, required certifications for the task and the time taken to complete the work. A straightforward fabrication job using common materials will generally be less expensive than a complex job using specialised materials. 

Aluminum is typically welded using TIG or MIG processes, as these offer a balance of strength and precision. TIG welding is often preferred for aluminium because it provides cleaner, high-quality welds. However, MIG welding can also be used effectively with aluminium, particularly for larger, less intricate jobs. It's important to note that welding aluminium can be more challenging than welding steel due to its unique properties, including a lower melting point and higher thermal conductivity, so it often requires a skilled and experienced welder.

Corrosion is a significant concern in welding and fabrication, especially in Queensland's humid climate and in environments such as mining sites where exposure to harsh conditions is common. There are several strategies for addressing corrosion. One is the use of anti-corrosive coatings and paints, which provide a barrier between the metal and the environment. Galvanization, or the application of a protective zinc coating to steel or iron, is another method. In some cases, corrosion-resistant materials like stainless steel or aluminium may be chosen.