Study on Galvanic Corrosion and Protection between TA15 Titanium Alloy and Aluminum Alloys or Structural Steels

The galvanic corrosion of TA15 titanium alloy coupled with aluminum alloys and structural steels was studied by means of current density of couples. The result indicated that the galvanic corrosion between TA15 titanium alloy and aluminum alloys or 30CrMnSiA structural steel was serious, it is necessary to protect aluminum alloys and 30CrMnSiA structural steel when it is coupled with TA15 titanium alloy. There was little galvanic corrosion between TA15 titanium alloy and 30CrMnSiNi2A structural steel. The current density of couples could be decreased by surface treatment to aluminum alloys and structural steels, and decreased greatly by applying paint after surface treatment.