What type of rivet is commonly used for riveting magnesium alloy structures?

The choice of 5056 aluminum rivets for riveting magnesium alloy structures is based on their specific alloying elements and corrosion resistance properties. Magnesium alloys are known to be sensitive to galvanic corrosion, particularly when in contact with dissimilar metals.

5056 aluminum offers excellent resistance to corrosion when exposed to magnesium environments. It contains magnesium as one of its alloying elements, which helps to minimize the potential for galvanic corrosion that could occur if a standard aluminum rivet were used. Additionally, 5056 aluminum rivets possess good mechanical properties suitable for structural applications.

In contrast, 2024 aluminum, while strong, is less resistant to corrosion and is not as suitable for use with magnesium alloys due to the potential for corrosion issues. 4130 steel, being a low alloy steel, can also corrode when in contact with magnesium, making it a less ideal choice for this application. Monel, a nickel-copper alloy, is resistant to corrosion, but it is heavier and more expensive, which makes 5056 aluminum a more practical option for this particular usage in aircraft structures.