船舶海水管路防腐蚀研究

  目的  加装绝缘垫片是预防海水异种金属管路间电化学腐蚀的重要措施，绝缘垫片的电绝缘性能反映了海水管路间电化学腐蚀程度。  方法  基于交流阻抗技术，设计并开发一套海水异种金属管路间电绝缘性能监测系统，主要包括电源模块、单片机模块、DDS信号发生器和通信模块、上位机软件等，并通过高精度仪器验证其测量精度。  结果  结果表明，该电绝缘性能监测系统具有较高的精度，对于10 MΩ以下绝缘电阻的测量误差小于5%。  结论  电绝缘性能监测系统在干态和湿态下均可适用，且精度满足实际使用需求。

Protection measures against erosion of seawater pipeline of ships

  Objectives  The installation of an insulating spacer is an important measure to prevent electrochemical corrosion between seawater dissimilar metal pipelines. The electrical insulation performance of the insulating spacer reflects the degree of electrochemical corrosion between seawater pipelines.  Methods  On the basis of the AC impedance technology, this paper designs and develops a system for monitoring electrical insulation performance between seawater dissimilar metal pipelines. The system mainly includes power module, microcontroller module, Direct Digital Synthesizer(DDS)signal generator and communication module, and upper computer software, and the measurement accuracy is verified with high-precision instruments.  Results  The results show that the electrical insulation performance monitoring system has a high measurement accuracy, and the measurement error of the insulation resistance below 10 MΩ is within 5%.  Conclusions  The electrical insulation performance monitoring system suitable for both dry and wet states is realized, which meets the actual application requirements.