摘要
为了提高建筑用AZ80Ti镁合金的耐腐蚀性能,选择尿素与氯化胆碱共同组成一种新型的离子液体,以AZ80Ti镁合金为基体来完成Al的电沉积过程,并对沉积得到的铝层的微观组织结构及其在3.5%的NaCl溶液中的耐蚀性进行了表征。研究结果表明:经过镀铝得到的基体表面β组织已经完全消失,生成了部分块状结构。当增加电镀时间后,最初的片层组织不断长大变成了颗粒结构,不同颗粒发生扩散后形成了由颗粒与片状组织共同组成的镀层。经过镀铝处理后,镁合金获得了更高的自腐蚀电位,表现出更强的耐蚀性。经过3 h电镀后,可以获得最优保护性能的铝镀层组织。对初始镁合金进行腐蚀测试后形成了粗糙的腐蚀表面,表面产生了大量的腐蚀脱落产物。经过3 h电沉积后形成了颗粒与片层共存的表面组织结构,腐蚀破坏程度达到最低,形成了较为致密的片层组织。
With selecting urea and choline chloride to form a new kind of ionic liquid,the electrodeposition process of Al was carried out on AZ80 Ti magnesium alloy as the matrix. Subsequently,the microstructure of the deposited aluminum layer and corrosion resistance in 3. 5%Na Cl solution were researched. Results showed that the β microstructure of the aluminized matrix surface disappeared completely and formed some blocky structures. When the plating time was increased,the initial lamellar structure gradually grew into a granular structure,and different particles spread around to form a coating composed of particles and lamellar structure. After aluminized,the magnesium alloy obtained a higher self-corrosion potential and showed stronger corrosion resistance. After 3 h of electroplating,the optimal protection performance of aluminum coating could be obtained. Moreover,the rougher corrosion surface was formed on the initial magnesium alloy after the corrosion test,on which there were lot of corrosive collapsed products. After 3 h of electrodeposition,the surface structure with the coexistence of particles and lamella was formed,and the degree of corrosion damage reached the minimum,which formed a relatively dense lamellar structure.
作者
张照方
李逵
张雷顺
ZHANG Zhao fang;LI Kui;ZHANG Lei-shun(Department of Geotechnical Engineering,Henan Vocational and Technical College of Architecture,Zhengzhou 450064,China;School of Water Resources and Envronment,Zhengzhou University,Zhengzhou 450064,China)
出处
《材料保护》
CAS
CSCD
2021年第1期90-93,126,共5页
Materials Protection
