FeSiAl电磁屏蔽涂层的腐蚀行为对吸波性能的影响

以在Q235冷轧钢板表面涂敷的FeSiAl电磁屏蔽涂层为研究对象，通过改变固化条件，探究了电磁屏蔽涂层的最优固化环境.同时，运用中性盐雾试验、电磁屏蔽性能测试和电化学阻抗试验，研究了自然条件固化后涂层的吸波性能和耐蚀性能随盐雾周期不同的变化规律.结果表明，电磁场下固化会损害涂层的腐蚀屏蔽性.吸波剂含量的增加不利于提升涂层的吸波性能，同时也会损害涂层的腐蚀屏蔽性.长期盐雾试验后，涂层的吸波性能随腐蚀屏蔽性的降低而下降. 

Effect of corrosion performance of FeSiAl electromagnetic shielding coating on absorbing properties

As science and high-tech have developed, stealth technology has gained increasing prominence in the military field. Application of stealth technology can improve the survival, defense, and attack capabilities of military equipment, thus it has become a focus in the field of modern military science. As the core part of radar stealth technology, absorbing materials are widely required by various industries. For military equipment such as ships operating in the marine environment, absorptive coating can not only make the military equipment effectively invisible, but can also enhance the corrosion protection capability of the equipment itself. Once the surface of an absorptive coating is corroded, not only will its corrosion resistance become compromised, but its absorbing performance may also be affected, leading to threats and hidden dangers to the safety of the weapons and equipment. At present, most researchers are paying more attention to the effect of absorbent particles on absorbing properties during studies of absorptive coatings. However, after addition of absorbent particles, the effect of the absorptive coating on a material's absorbing properties is unknown when corrosion resistance is constantly changing. Therefore, research in this area is of great significance in selection of surface absorbing coatings for marine weapons and equipment. In this study, FeSiAl electromagnetic shielding coating, based on Q235 cold-rolled steel, was used as the experimental material. By changing curing conditions, the optimal curing environment for electromagnetic shielding coating was explored. At the same time, the neutral salt spray test, electromagnetic shielding performance test, and electrochemical impedance test were applied to study the variations in absorption and corrosion resistance of the coating after curing in natural conditions during the salt spray period. Results show that curing under an electromagnetic field can impair the corrosion resistance of the coating. Increasing the content of the absorbing agent was not conducive to improving the absorbing properties of the coating, and impaired the corrosion shielding properties of the coating. After the long-term salt spray test, absorbing properties of the coating decreased with decreasing corrosion shielding properties.