锌铝粉含量对无铬锌铝涂层性能的影响  

Impact of Zinc-aluminum Powder Content on Performance of Chrome-free Zinc-aluminum Coatings

作　　者：陈广义[1,2] 张建成 张文卓 王德成 怀向东 张龙飞 Chen Guangyi;Zhang Jiancheng;Zhang Wenzhuo;Wang Decheng;Huai Xiangdong;Zhang Longfei(School of Automotive Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;Anhui Huagu Environmental Protection Technology Co􀆰􀆯Ltd􀆰􀆯Suzhou,Anhui 234000,China;Mechanical Engineering College,Dalian University,Dalian,Liaoning 116622,China)

机构地区：[1]大连理工大学汽车工程学院,辽宁大连116024 [2]安徽华顾环保科技有限公司,安徽宿州234000 [3]大连大学机械工程学院,辽宁大连116622

出　　处：《涂料工业》2023年第2期14-19,26,共7页Paint & Coatings Industry

摘　　要：本文研究了锌铝粉含量对锌铝涂层的防腐蚀性、外观以及附着力等性能的影响。结果表明,锌铝粉含量在23%~32%范围内得到的无铬锌铝涂层表面致密完整,无裂纹、起泡等不良现象,片状锌铝粉层层堆叠、紧密结合,能够对金属基体起到有效的物理屏障防护作用;随着锌铝粉含量的增加,锌铝金属涂层自腐蚀电流密度先减小后增大,涂层自腐蚀电压以及涂层电阻先增大后减小,锌铝粉含量为29%时涂层自腐蚀电流密度最低(8.356×10^(-6)A/cm^(2)),活化后涂层电阻最大(620.6Ω·cm^(2)),耐蚀性最好。The influence of zinc-aluminium powder content on the corrosion resistance,appearance and adhesion of zinc-aluminium coatings was studied in this paper.The results showed that the chrome-free zinc-aluminium coating with 23%~32%zinc-aluminium powder was compact and complete without cracks and foaming.The sheet-like zinc-aluminium powder were stacked layer by layer and bonded tightly,which could effectively protect the metal by physical shielding effect.With the increase of zinc-aluminum powder content,the self-corrosion current density of zinc aluminum metal coating decreased first and then increased,and the self-corrosion potential and coating resistance increased first and then decreased.The coating with 29%zinc-aluminium powder content had the lowest self corrosion current density of 8.356×10^(-6)A/cm^(2),and the highest resistance of 620.6Ω·cm^(2) after being activated,showing the best corrosion resistance.

关 键 词：锌铝粉含量 无铬锌铝涂层 极化曲线 阻抗谱 耐腐蚀性 

分 类 号：TQ635.2[化学工程—精细化工]