Abstract
For many applications, titanium may be used because of its excellent corrosion resistance rather than its good mechanical properties.We therefore investigated the corrosion resistance of the welded commercial pure titanium in sea water compared with those of the welded practical corrosion resisting alloys (corrosion resisting aluminium alloy, 18-8 stainless steel and mild steel). Additionally, we tested the welds of these alloys in alkali and acid.We used two kinds of corrosion test; extents of corrosion were determined with weight loss or increase of the electrical resistance respectively.The results of these tests showed that the commercial pure titanium was the most excellent among the tested materials, but the heat affected zone was inferior to the parent metal and the weld.
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