建筑用Q295B冷喷涂Al_(2)O_(3)-Al-xY涂层的耐海水腐蚀性能  

Seawater Corrosion Resistance of Cold Spray AlO-Al-xY Coating on Q295B Surface of Building

作　　者：杨磊 朱富丽[2] 张浩[3] 白波 YANG Lei;ZHU Fu-li;ZHANG Hao;BAI Bo(Department of Architectural Engineering,Henan Vocational College of Information Statistics,Zhengzhou 450008,China;Henan University of Animal Husbandry and Economics,Information Technology Office,Zhengzhou 450044,China;College of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China;Ocean Chemical Research Institute Co.,Ltd.,Qingdao 266071,China)

机构地区：[1]河南信息统计职业学院建筑工程系,河南郑州450008 [2]河南牧业经济学院信息化办公室,河南郑州450044 [3]郑州大学土木工程学院,河南郑州450001 [4]海洋化工研究院有限公司,山东青岛266071

出　　处：《材料保护》2021年第4期41-45,79,共6页Materials Protection

基　　金：国家自然科学基金项目(51608490);河南省高等职业学校青年骨干教师培养计划(2019GZGG074)资助。

摘　　要：为了提高建筑用Q295B在海水中的腐蚀性能,通过在粉末中掺入微量稀土元素Y的方式,使冷喷涂Al_(2)O_(3)-Al涂层获得更强耐蚀能力;并测试分析了加入不同含量(0~0.50%,质量分数)Y下Al_(2)O_(3)-Al涂层显微组织结构、耐蚀性能的变化。研究结果表明:Al_(2)O_(3)-Al涂层内形成了许多外形差异较大的颗粒物,Al_(2)O_(3)-A涂层与Q295B基体之间结合紧密,并形成了明显的过渡界面,同时发现界面组织形成了凹凸不平的结构。加入Y后能够有效降低Al_(2)O_(3)-Al涂层在海水中的腐蚀程度。对Y含量为0.20%的涂层进行自然海水700 h浸泡处理后获得了更大的阳极极化率,达到最低的腐蚀电流密度。Al_(2)O_(3)-Al-xY涂层腐蚀产物组织包含Al以及Al_(2)O_(3),在试验范围内提高Y加入量后,有助于生成更加致密的防腐蚀层。In order to improve the corrosion performance of building Q295 B surface in seawater,by adding trace rare earth element Y into the powder,the corrosion resistance of cold sprayed Al_(2)O_(3)-Al coating was enhanced.The changes of microstructure and corrosion resistance of Al_(2)O_(3)-Al coating with different content of Y(0~0.50%,mass fraction,the same below)were analyzed by means of experimental test.Results showed that many particles with different shapes were formed in the Al_(2)O_(3)-Al coating,and the coating and the substrate were closely bound together to form an obvious transition interface.Meanwhile,some uneven structures were formed in the interface tissues.Besides,the addition of Y could effectively reduce the degree of corrosion of Al_(2)O_(3)-Al coating in seawater.After soaking the coating with Y content of 0.2%for 700 h,a higher anode polarization rate was obtained and the lowest corrosion current density reached.The corrosion products of Al_(2)O_(3)-Al-xY coating contained Al and Al_(2)O_(3).Increasing the amount of Y in the experimental range could promote the formation of a denser anti-corrosion layer.

关 键 词：冷喷涂 铝基涂层 稀土元素Y 电化学 海水 腐蚀行为 

分 类 号：TG174[金属学及工艺—金属表面处理]