Thanks to its properties - lightweight, flexibility, strength – aluminum is a popular choice of metal. Choosing fasteners for aluminum, on the other hand, is complicated by aluminum’s tendency to react negatively with other metallic substances, leading to corrosion.
To simplify the selection of an appropriate option, here is a breakdown of fastener that will not corrode when in contact with aluminum:
1. Coated Steel Fasteners
Even the most reactive metal is safe when encased in a thick enough coating.
Having said that, it is safest to avoid a metal that is very reactive, such as brass, and opt rather for one of the least reactive metals, such as stainless steel. That will give you peace of mind in case the coating peels away or disintegrates.
2. Electroplated Steel Fasteners
Also known as galvanization, steel fasteners that are electroplated with a layer of corrosion-resistant metal generally cost less than newer, high-tech coated fasteners.
Although the electrical process secures the protective coating tightly to the surface of the metal, it can wear off over time.
3. Aluminum Fasteners
One way to avoid two-metal reaction corrosion is to stick with aluminum throughout the project. The downside is that aluminum fasteners do not offer adequate shearing resistance for all but lighter-duty uses.
4. Non-Metal Fasteners
Similarly, high-strength plastic fasteners lack the strength of metal varieties. Used in less heavy-duty applications such as medical and food-manufacturing, non-metal fasteners prevent aluminum corrosion.
If you are still unsure which fasteners you can use with aluminum without corroding it, we at Marsh Fasteners will help you choose the best products with the highest anti-corrosion qualities. As a leading stainless steel fastener specialist, we have partnered with manufacturers and suppliers of the full range of stainless steel and aluminum use across all industries. For more information, contact us today.