无铬达克罗涂层的工艺研究.pdf
ControlVOI.31N0.3
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·化学转化膜·
无铬达克罗涂层的工艺研究
ReseachontheofNon—chromateDacrOmet
PreliminaryTechniqueCoating
季利亚。姚正军
(南京航空航天大学材料科学与技术学院,江苏南京211106)
YAO
JILi-ya,zheng.jun
ofMate“alScienceandofAeronautics
(C01legeingUniversity
Engineering,Nanj
and211106,China)
Astronautics,Nanjing
摘要:在前期实验的基础上,对无铬达克罗涂料中主要组分的质量分数设计了4因素4水平正交实验,通过考察涂层外观,
结合力和耐蚀性确定了理想配方。运用SEM和EDS等手段分析了涂层的组织形貌和成分,并用电化学方法测试了涂层的耐
蚀性能。在此基础上,向涂料中加入不同种类的纳米微粒,研究了其对涂层的硬度和耐蚀性能的影响。结果表明:所得无铬
涂层的耐蚀性能与达克罗涂层的相近;加入纳米微粒后,涂层的硬度有一定程度的提高,但对涂层的耐蚀性能产生了微小不
利影响。
关键词:无铬;锌一铝涂料;纳米微粒
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