HC Surface Treatment Network News: As the energy crisis becomes more and more prominent, the development and utilization of rich marine resources has been paid more and more attention. The ability to develop marine resources not only reflects the level of a country's marine technological innovation and its promotion and application, but also reflects the country's competitive potential and comprehensive national strength in the marine field. At present, my country's exploration and development in the marine field is continuously heating up, and more and more marine engineering facilities are put into application, such as offshore platforms, oil and gas pipelines, quay wall facilities, and large ships. However, the development of these marine engineering facilities still faces many problems. Corrosion damage, abrasion failure and biofouling have seriously delayed our progress in the development and utilization of marine resources. According to data, marine engineering materials cause nearly one trillion yuan in economic losses every year due to corrosion and other problems. Therefore, the research on the failure mechanism of marine corrosion and the improvement of the anti-corrosion technology of engineering facilities have become an urgent problem in the field of marine engineering in my country.

 

　　Research and application results in recent years show that the use of thermal spray alloy anticorrosive coating is one of the effective methods for corrosion protection of steel structures in marine environments. This technology is a surface processing method that uses various heat energy to melt anticorrosive metal materials and atomize and spray them on the surface of parts through high-speed airflow to form a protective coating. However, the traditional arc spraying anticorrosion technology is usually operated manually, which leads to its low control accuracy, unstable coating quality, and its operating environment is relatively harsh. These conditions severely restrict the application of this technology in marine anticorrosion projects. Wider application and development in the field. In response to these problems, the author's scientific research team integrated intelligent control technology, inverter power technology, infrared temperature measurement technology, and numerical simulation technology to comprehensively and innovatively developed a new type of automatic high-speed arc spraying equipment, and upgraded the traditional "extensive" arc spraying technology to a spraying process. Advanced and efficient maintenance technology with precise and controllable coating quality.

 

　　The automated intelligent high-speed arc spraying system realizes the integrated linkage control of the operating system and the spraying equipment. It has the characteristics of high automation, stability and reliability, and has significant effects in the field of large-scale anti-corrosion on the surface of marine engineering materials. The high-speed arc spray gun in this system achieves supersonic air atomization, with a maximum air velocity of 586m/s. The maximum particle flying speed of iron-based spraying materials has been increased from below 100m/s in traditional spraying to above 150m/s. The bonding strength can reach 20-40MPa, the porosity is significantly reduced, and the coating quality is greatly improved. The high-stability pulse-width modulation type digital arc spraying inverter power supply with independent intellectual property rights in the system realizes the intelligent self-feedback and self-regulation between the spraying parameters and the wire feeding speed during the spraying process. Compared with the silicon rectifier power supply used in traditional arc spraying, the volume and weight of the inverter spraying power supply are reduced by 50% and 75% respectively, and the quality is more reliable, which is convenient for on-site maintenance operations. Using the developed arc spraying intelligent fuzzy control unit, combined with the infrared thermal imager to monitor the spraying temperature field, the online intelligent closed-loop feedback control of arc spraying process parameters is realized, and then the optimal control of the residual stress of the coating is realized. The equipment unit adopts modular design, strong environmental adaptability, accurate and controllable coating quality, which upgrades the arc spraying to advanced maintenance technology that can accurately control the spraying process and coating quality. The spraying efficiency is more than 3 times that of manual, which greatly reduces Operational strength provides technical support for surface anti-corrosion of marine engineering facilities.