Fasteners are generally at risk of corrosion due to the metal they are made up of. However, there are many ways to prevent them from rusting. The first step is to use coating, insulation or paint to seal the bolts. Make sure to install the fasteners in a manner that offers constant pressure. If the load keeps on changing, then the chances of corrosion become more. Lastly, bolts come in a variety of construction materials ranging from stainless steel and zinc to titanium. Some metals are corrosion-free. However, the chances of rust also depend upon the difference in electric potential between bolt metal and the surface they are fastening. Choose the bolts that have similar electric potential as the material they are fastening together. It would reduce the chances of corrosion.