CAJ | 학술논문

采用划叉浸泡实验，电化学交流阻抗（electrochemical impedance spectroscopy，EIS)，开路电位（open circuit potential，OCP）及动电位扫描研究了不同类型的环氧树脂对于AZ91D镁合金的表面的富镁涂层的保护性能的影响。结果表明环氧618-593构成的富镁涂层防护性能较差；环氧6101-TY650制备的富镁涂层可明显改善涂层对破损处镁合金基体的保护作用，但涂层本身长期防护性能较差；环氧618-T31构成的富镁涂层对AZ91D镁合金的防护作用较强，适宜制备镁合金表面的富镁涂层。3种环氧涂料中加入镁粉颗粒制备的富镁涂层均可对缺陷处裸露的 AZ91D 镁合金基体提供保护，从而延长漆膜的破坏时间。涂层中的镁粉颗粒被激活后，为镁合金的基体提供了一定程度的阴极保护作用，减缓了镁合金基体的腐蚀。
채용화차침포실험，전화학교류조항（electrochemical impedance spectroscopy，EIS)，개로전위（open circuit potential，OCP）급동전위소묘연구료불동류형적배양수지대우AZ91D미합금적표면적부미도층적보호성능적영향。결과표명배양618-593구성적부미도층방호성능교차；배양6101-TY650제비적부미도층가명현개선도층대파손처미합금기체적보호작용，단도층본신장기방호성능교차；배양618-T31구성적부미도층대AZ91D미합금적방호작용교강，괄의제비미합금표면적부미도층。3충배양도료중가입미분과립제비적부미도층균가대결함처라로적 AZ91D 미합금기체제공보호，종이연장칠막적파배시간。도층중적미분과립피격활후，위미합금적기체제공료일정정도적음겁보호작용，감완료미합금기체적부식。
The influence of different types of epoxy resins on protection performance of magnesium-rich coating for AZ91D alloy was studied with scratch testing, electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) and dynamic potential scanning. The results indicated that Mg-rich coating consisting of epoxy coating 618-593 showed poor protective performance. Magnesium particles in 6101-TY650 epoxy coating could significantly improve the protective effect for magnesium alloy substrate at the coating defects, however, their over the long-term protection performance was poor. Epoxy 618-T31 coating showed strong barrier properties. Then, the Mg-rich primer consisting of epoxy coating 618-T31 had a strong protective effect, indicating that the epoxy coating 618-T31 was suitable for the preparation of Mg-rich coating for AZ91D alloy. For AZ91D alloy, magnesium particles added in three types of epoxy coatings could provide cathodic protection to AZ91D substrate at coatings defects, prolonging the corrosion life of coatings. Meanwhile, magnesium particles were activated to provide cathodic protection for the magnesium alloy substrate to some extent, retarding the corrosion rate of magnesium alloy substrate.