表面技术2017，Vol.46Issue(7)：173-177,5.DOI:10.16490/j.cnki.issn.1001-3660.2017.07.029
三乙醇胺及三乙醇胺/尿素复配物对氧化锆转化膜性能的影响
Effects of Triethanolamine and Composite of Triethanolamine/Carbamide on Zirconia Conversion Film
周祉存 1王婷婷 1吴方 1张培强 1张静 1于锦2
作者信息
- 1. 沈阳工业大学理学院,沈阳 110870
- 2. 中国有色(沈阳)冶金机械有限公司,沈阳 110870
- 折叠
摘要
Abstract
The work aims to improve corrosion resistance of zirconia conversion film on steel.With Q235 steel sheets were studied as objects of study,a zirconia conversion film was preparedon the steel surface by adding containing different concentra-tions of triethanolamine or composite of triethanolamine/carbamide to the zirconium solution. Electrochemical behavior of the zirconia conversion film in 5% NaCl corrosive liquidwas discussed with polarization curves and electrochemical impedance spectroscopy. Morphology of the zirconia conversion film was observed with SEM. After coating the films with different pri-mers, properties of zirconia conversion film was assessed by performing adhesion test by scratch. Forthe zirconia conversion film prepared by adding 100mg/L triethanolamine to zirconia basic film-forming liquid in 5% NaCl corrosive liquid, the self-corrosion current was 1.66×10?5 A/dm2, passivation areawaswidest, impedance was the highest and corrosion resistance was the best. However, for the zirconia conversion film made from carbamide instead of 50%triethanolaminein 5% NaCl corrosive liquid, the self-corrosion potential and current changed slightly, the passivation area was wider while impedance arc increased obviously. For the zirconia conversion filmprepared by adding triethanolamine and composite of triethanolamine/carbamide in zirconia basic film-forming liquid treated with 2% silanol confining liquidand 5% silane confining liquid, the adhesion to low-treated surfaceepoxy primer and modified epoxy primer coating was grade 1. The corrosion resistance of Q235 steel can be enhanced by adding triethanolamine or composite of triethanolamine/carbamide to the zirconium solution. After being treated-with 2% silanol confining liquid and 5% silaneconfining liquid, respectively,the zirconia conversion film keeps good adhesion to low pretreated surface epoxy primer andmodified epoxy primer.关键词
氧化锆转化膜/三乙醇胺/尿素/耐蚀性/硅醇/硅烷/附着力Key words
zirconia conversion film/triethanolamine/carbamide/corrosion resistance/silanol silane/adhesion分类
矿业与冶金引用本文复制引用
周祉存,王婷婷,吴方,张培强,张静,于锦..三乙醇胺及三乙醇胺/尿素复配物对氧化锆转化膜性能的影响[J].表面技术,2017,46(7):173-177,5.
