MIG welding repair may be a challenge for a beginner welder. The metal has an oxide layer on top and a relatively low melting point. This makes aluminum parts difficult to repair because there’s a high chance of burning it through, ending up with a puddle of molten metal on the ground.
If the part was already used, it may be dirty and even more difficult to repair. Gladly, welding professionals have welding repair tips when it comes to working with aluminum.
Today, we’re going to share the most effective recommendations with you.
1. Evaluate the Condition of the Part to Be Repaired
The first step that will determine whether you should even put your welding gear on is the evaluation of the part. If it’s too dirty, rusty, and damaged, it’s not worth your time unless it’s very expensive to replace.
It’s wise to determine the cost of labor and materials you will use for the repair and the cost of a new part.
2. Prepare the Aluminum Properly Before Welding
Inspect the part to see the scope of work. Aluminum is vulnerable to dirt, oil, rust, and other types of damage. They make it too porous. In those pores, more dirt may reside.
If it’s worth it, choose a special aluminum cleaner and prepare the element. If the joints need additional cleaning, use smaller brushes and thin cloths to access the tiny parts. Finish with a stainless steel brush.
3. Choose a Welding Method Wisely
For thinner parts, it’s recommended to use TIG welding. However, it can be way too slow if you need an easy and quick fix. If so, MIG welding is a nice choice, increasing the speed and precision of the process.
You can also use a pulsed MIG approach, which releases parts of fixing metal in drops, allowing for even more precision. It also allows for lower temperatures, which reduces the risk of damaging the aluminum element even more.
5. Choose Proper Equipment
A commonly used MIG gun won’t be the best helper for aluminum parts repairs if you’re using wires of the same material to fix. A spool gun is better for such repairs since it cuts the distance between the wire entrance and its release as the fixing material.
6. Choose a Suitable Filler
When choosing a filler, you should find out the type of aluminum used and what the part is for. There are special charts that will help you pick the most suitable metal for a particular application.
Repairing aluminum parks is a tricky process, but handling it will make you a better professional. Make sure to choose equipment that is the most suitable for aluminum filler wires or change the filler at all. Clean the parts well and don’t hesitate to call a professional when you need help.