建筑景观钢结构的表面改性设计与性能研究  

Research on surface modification and property of architectural landscape steel structures

作　　者：茅舒青 韩越祥[1] Mao Shuqing;Han Yuexiang(School of Design and Art,Zhejiang Industry Polytechnic College,Shaoxing 312099,China)

机构地区：[1]浙江工业职业技术学院设计与艺术学院,浙江绍兴312099

出　　处：《电镀与精饰》2024年第4期51-58,共8页Plating & Finishing

基　　金：浙江省重点研发计划项目(2022C02013)。

摘　　要：为了提升建筑景观钢结构的表面性能,采用等离子喷涂和化学修饰的方法在钢结构用Q345B钢基体表面制备了4种不同成分配比的(Ni_(60)+Al_(2)O_(3))涂层,研究了粉末成分配比对涂层物相组成、形貌、硬度、耐磨性和耐蚀性的影响。结果表明,4种涂层表面未见异常凹坑或者裂纹,局部存在未完全熔化的颗粒和微孔;涂层表面粗糙度会随着Ni_(60)粉末质量分数的增加而减小。涂层A(10%Ni_(60))、涂层B(20%Ni_(60))、涂层C(30%Ni_(60))和涂层D(40%Ni_(60))与钢结构基体的结合强度分别为26、37、50和56 MPa,涂层区和界面区的硬度都高于钢结构基体,涂层C的涂层区硬度最高;当Ni_(60)粉末质量分数从10%增加至40%,涂层的磨损率先减后增,涂层C的磨损率最小,具有最佳耐磨性能。化学修饰处理可以提升Q345B钢基体表面涂层的耐蚀性能,且当Ni_(60)粉末质量分数从10%增加至40%,化学修饰后涂层的腐蚀电位先正移后负移、腐蚀电流密度先减后增、阻抗弧半径先增后减,化学修饰后涂层C的腐蚀电位最正、腐蚀电流密度最小、阻抗弧半径最大,涂层C具有最佳耐蚀性能。In order to improve the surface performance of architectural landscape steel structures,four different composition ratios of(Ni_(6)0+Al_(2)O_(3))coatings were prepared on the Q345B steel substrate surface using plasma spraying and chemical modification methods.The effects of powder composition ratios on the phase composition,morphology,hardness,wear resistance,and corrosion resistance of the coatings were studied.The results showed that there were no abnormal pits or cracks on the surface of the four coatings,and there were partially melted particles and micropores in local areas;The surface roughness of the coating will decrease as the mass fraction of Ni60 powder increases,the bonding strength between coating A(10%Ni_(60)),coating B(20%Ni_(60)),coating C(30%Ni_(60)),and coating D(40%Ni_(60))with the steel structure substrate is 26,37,50,and 56 MPa,respectively.The hardness of the coating area and interface area is higher than that of the steel structure substrate,and the coating area of coating C has the highest hardness;When the mass fraction of Ni60 powder increases from 10%to 40%,the wear of the coating first decreases and then increases,and the wear rate of coating C is the smallest,with the best wear resistance.Chemical modification treatment can improve the corrosion resistance of the surface coating on Q345B steel substrate.When the mass fraction of Ni60 powder increases from 10%to 40%,the corrosion potential of the chemically modified coating first shifts positive and then negative,the corrosion current density first decreases and then increases,and the impedance arc radius first increases and then decreases.After chemical modification,the corrosion potential of coating C is the most positive,the corrosion current density is the smallest,and the impedance arc radius is the largest,coating C has the best corrosion resistance performance.

关 键 词：钢结构 等离子喷涂涂层 化学修饰 耐磨性 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]