CAJ | 학술논문

采用电弧喷涂技术在Q235钢表面制备了Al-Mg和Re-Al-Mg涂层，分别研究了这两种涂层的耐腐蚀性能，利用中性盐雾试验及电化学测试等试验方法研究了两种涂层的防腐蚀性能并通过扫描电子显微镜分析了Al-Mg和Re-Al-Mg涂层腐蚀前后的微观组织形貌，并讨论了涂层的结构及耐蚀机理，结果表明两种涂层在极化过程中都出现了明显的钝化现象，两种涂层在腐蚀过程中表面都会生成一层氧化膜，起到了物理屏蔽作用延缓了涂层的腐蚀速率，但稀土铝镁合金涂层的防腐蚀性能明显优于铝镁合金涂层，这是由于稀土元素的加入，降低了涂层的孔隙率，使涂层具有了良好的耐腐蚀性能。稀土铝镁合金涂层在中性盐雾试验中表现出的腐蚀速率是最慢的，电化学试验过程中其表现出钝化区域最大，具有良好的腐蚀与防护性能。
채용전호분도기술재Q235강표면제비료Al-Mg화Re-Al-Mg도층，분별연구료저량충도층적내부식성능，이용중성염무시험급전화학측시등시험방법연구료량충도층적방부식성능병통과소묘전자현미경분석료Al-Mg화Re-Al-Mg도층부식전후적미관조직형모，병토론료도층적결구급내식궤리，결과표명량충도층재겁화과정중도출현료명현적둔화현상，량충도층재부식과정중표면도회생성일층양화막，기도료물리병폐작용연완료도층적부식속솔，단희토려미합금도층적방부식성능명현우우려미합금도층，저시유우희토원소적가입，강저료도층적공극솔，사도층구유료량호적내부식성능。희토려미합금도층재중성염무시험중표현출적부식속솔시최만적，전화학시험과정중기표현출둔화구역최대，구유량호적부식여방호성능。
Al-Mg and Re-Al-Mg coatings are prepared on Q235 steel surface by arc spraying technology. The corrosion resistance of Al-Mg and Re-Al-Mg coatings was studied respectively. The neutral salt spray test and electrochemical test have been used to study the corrosion resistance of the two coatings, and the microstructure of Al and Re-Al-Mg coatings before and after corrosion were analyzed by scanning electronic microscope. Then, the structure and anticorrosive mechanism are analyzed. The results show that there is a clear passive phenomenon of two kinds of coatings in the polarization process, and a layer of oxide film on the coating surface in the process of corrosion is generated, it is a physical shield which can delay the corrosion rate of coating, but the corrosion resistance performance of Re-Al-Mg coating is better than Al-Mg coating obviously, it' s because by the rare earth elements added, it reduces the porosity of the coating, increasing the hardness of the coating and the bond strength with substrate, resulting in a coating with good corrosion resistance.