CAJ | 학술논문

研究了表面镀铝和未镀铝的钆的静态和电化学腐蚀试验。结果表明，未镀铝的钆在水作用下表面形成大量裂痕，而多角状的铝膜结构由于点蚀坑的存在比片状铝膜结构的耐腐蚀性能差。片状铝膜由于与基体之间形成有效的物理阻挡，且片状结构致密，延长了阴极保护。因此，制备表面层状铝膜结构是显著提高磁制冷钆表面耐腐蚀性能行的有效方法。
연구료표면도려화미도려적구적정태화전화학부식시험。결과표명，미도려적구재수작용하표면형성대량렬흔，이다각상적려막결구유우점식갱적존재비편상려막결구적내부식성능차。편상려막유우여기체지간형성유효적물리조당，차편상결구치밀，연장료음겁보호。인차，제비표면층상려막결구시현저제고자제랭구표면내부식성능행적유효방법。
Al coatings with different microstructures were prepared on the surface of Gd using the magnetron sputtering technique to improve its corrosion resistance. The corrosion behaviors for the pure Gd and Gd with Al coating in distilled water were studied using the mass loss and electrochemical performance. As a result, pure Gd without coating shows a certain amount of surface cracks under water flow conditions, whereas the polygonal Al coating decreases the path of the corrosive medium to body due to the existence of eroding pits structure. Compared with the polygonal structure Al coating and pure Gd, the lamellar structure of Al coating exhibits a higher electrochemical protection performance (e.g., a lower corrosion current and higher self-corrosion potential) and no occurrence of pitting corrosion. Due to an effective physical shield, the formation of the lamellar structure protected the inner Gd part from being corroded, and prolonged the duration of cathodic protection.