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国外用铜合金制造舰船冷凝器管已有几十年历史。随着蒸汽轮机在舰船上用于推进,冷凝器管中海水的流速有所提高,早期使用的黄铜管和海军黄铜管在较高的水速下往往因产生严重的冲击腐蚀和脱锌腐蚀而遭到快速破坏。于是,国外采用铝黄铜、铜镍合金等抗蚀性更好的铜合金来代替上述合金制造冷凝器管。由于铜镍合金具有极好的抗蚀性(例如在静止海水和流速较高的海水中均有较高的抗蚀性;基本上无晶间腐蚀、应力腐蚀开裂和腐蚀疲劳现象;有良好的抗氨气腐蚀性等),故含
Foreign manufacturers of copper alloy ship condenser tube has decades of history. As steam turbines are used on ships for propulsion, the velocity of the seawater in the condenser tubes has been increased. Earlier brass and Navy brass tubes were often subjected to severe impact corrosion and off-take at higher water velocities Zinc corrosion has been rapidly damaged. As a result, foreign countries such as aluminum brass, copper and nickel alloys better corrosion resistance of copper alloys to replace the above-mentioned alloy tube condenser. Since copper-nickel alloys have excellent corrosion resistance (for example, high corrosion resistance in both still seawater and high-velocity seawater; substantially no intergranular corrosion, stress corrosion cracking and corrosion fatigue phenomena; good Anti-ammonia corrosion, etc.), so containing