Aluminum coating significantly improves the performance of titanium alloy fasteners

Titanium alloy fasteners have excellent comprehensive performance. It has been widely used in aircraft, especially the current advanced large aircraft manufacturing, used for connection betwween fasteners and aluminum alloy workpieces.

However, titanium alloy fasteners without surface treatment has a higher potential, and there is a higher potential difference with the connected aluminum alloy parts. In the humid atmosphere or ocean weather, galvanic couples are formed and electrochemical corrosion occurs. In severe cases, it will destroy the structure and make it invalid. If a layer of paint composed of phtnolic resin, aluminum powder, and PTFE, anti-corrosion, pigment i applied to surface of the fasteners, this will not form a galvanic couple and corrode. The coating thickness is 7-11 microns.