筛选了第一、二、三代舰船海水管路用典型代表材料TUP紫铜、B10铜镍合金、TA2钛合金，采用拉伸试验、海水长期浸泡试验和海水冲刷试验对这三种材料的性能进行了比较。结果表明:TUP紫铜成分单一，强度较低；B10铜镍合金因合金元素增多而具有优异的强度及塑性；TA2钛合金强度较高，但塑性并无优势。经过16 a实海浸泡试验后，TA2钛合金完全耐蚀，B10铜镍合金的耐蚀性较TUP紫铜好。冲刷试验结果显示，TA2钛合金具有优异的耐蚀性，而TUP紫铜和B10铜镍合金的腐蚀失重随流速的增大而增大。随着流速的增加，TUP紫铜和B10铜镍合金的电位呈不规律波动，而TA2钛合金的电位有正移趋势。

TUP red copper, B10 copper-nickel alloy and TA2 titanium alloy were selected as typical representative materials for seawater pipelines of ships of the first, second and third generations, and the properties of these three materials were compared by tensile test, seawater long-term immersion test and seawater scouring test. The results showed that:TUP red copper had a single composition and low strength; B10 copper-nickel alloy had excellent strength and plasticity due to the increase of alloying elements. TA2 titanium alloy had relatively high strength, but had no advantage in plasticity. After 16 years of real sea immersion test, TA2 titanium alloy was completely corrosion-resistant, and B10 copper-nickel alloy had better corrosion resistance than TUP copper. Erosion test results showed that TA2 titanium alloy still had excellent corrosion resistance, and the corrosion weight loss of TUP copper and B10 copper-nickel alloy increased with the increase of flow rate. With the increase of flow rate, the potential of TUP copper and B10 copper-nickel alloy fluctuated irregularly, while the potential of TA2 titanium alloy had a positive shift trend.