大部分船体外壳通过喷漆、牺牲阳极和外加电流阴极保护方法来解决抗腐蚀问题.但是,这些传统的方法不是非常有效,因为船尾的船舵常暴露在严重的腐蚀环境中,例如潮汐、船行驶速度、气蚀和冲刷腐蚀.由于气泡的生成与破裂而产生的振荡波而导致的气蚀和冲刷腐蚀会对材料产生破坏.对热喷涂Al-Zn合金涂层进行了气蚀和电化学性能测试实验.然后,Al-Zn合金涂层表面涂刷F-Si封闭剂以提高Al-Zn涂层的耐海水电化学腐蚀和抗气蚀性能.结果表明,该封闭剂不但适用静态环境,而且适用于动态环境.%Most hulls of the ships are protected with paintings,sacrificial anode,and impressed current cathodic protection methods against corrosion problems.However,these conventional methods are not very effective because the rudder of ships stem are exposed to very severe corrosive environment such as tides,speeds of ships,cavitations and erosion corrosion.The environmental factors such as cavitation and corrosion will cause damage for materials with the shock wave by the creation and destruction of bubble.To solve these problems,the cavitation and electrochemical experiments are executed for thermal spray coating with Al-Zn alloy wire material.Thereafter,and sealed specimens with F-Si sealer on Al-Zn alloy coated specimen are executed to improve electrochemical and anti-cavitation characteristics in sea water.The application of fluorine silicon sealing after spray coating of 15％Al-85％Zn seems to be appropriate not only in static environment but also in dynamic environment.
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