Chromate-free passive films made by Manganate and waterborne polyurethane on galvanized steel sheets

被引：1
作者：
Kong, Xianghua [1 ]
Yang, Hui [1 ]
Liu, Yaxuan [1 ]
Lu, Wanheng [1 ]
Guo, Jing [1 ]
Liu, Shanshan [1 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
来源：
MATERIALS PROCESSING TECHNOLOGIES, PTS 1 AND 2 | 2011年 / 154-155卷
关键词：
Galvanized steel sheet; KMnO(4); Waterborne Poly Urethane; Passive films; CORROSION PROTECTION; SURFACE-TREATMENT; CHROMIUM VI; PRETREATMENT;
D O I：
10.4028/www.scientific.net/AMR.154-155.292
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to develop an environmental friendly passive films on galvanized steel sheet, a chromium-free passive solution based on waterborne polyurethane (WPU) and Manganate was studied. The results show that the optimized compositions in passive solution are KMnO(4) 6g/L, (NH(2))(2)CS 5g/L and WPU 150g/L. The passive films were prepared by dipping steel substrates into the passive solution for 10 seconds and drying at 120 degrees C for 30 seconds. SEM observation shows that the film's thickness is about 1.5 mu m. XRD patterns indicates that the chromate-free passive films mainly consisted of MnO(2) and K(2)MnO(4). Anticorrosion tests indicate that the chromate-free passive films can provide an excellent barrier to corrosive agents.
引用
收藏
页码：292 / 298
页数：7
相关论文
共 18 条
  • [1] Oxidising alternative species to chromium VI in zinc galvanised steel surface treatment. Part 1 - A morphological and chemical study
    Almeida, E
    Diamantino, TC
    Figueiredo, MO
    Sa, C
    [J]. SURFACE & COATINGS TECHNOLOGY, 1998, 106 (01) : 8 - 17
  • [2] Oxidising alternative species to chromium VI in zinc-galvanised steel surface treatment. Part 2 - An electrochemical study
    Almeida, E
    Fedrizzi, L
    Diamantinio, TC
    [J]. SURFACE & COATINGS TECHNOLOGY, 1998, 105 (1-2) : 97 - 101
  • [3] BRUCE RWH, 1991, MET FINISH, V89, P15
  • [4] Investigation of zinc chromatation Part II. Electrochemical impedance techniques
    Gabrielli, C
    Keddam, M
    Minouflet-Laurent, F
    Ogle, K
    Perrot, H
    [J]. ELECTROCHIMICA ACTA, 2003, 48 (11) : 1483 - 1490
  • [5] Gong Li, 2007, Journal of Iron and Steel Research, V19, P88
  • [6] Synthesis, thermal, mechanical and rheological properties of multiwall carbon nano tube/waterborne polyurethane nanocomposite
    Kuan, HC
    Ma, CCM
    Chang, WP
    Yuen, SM
    Wu, HH
    Lee, TM
    [J]. COMPOSITES SCIENCE AND TECHNOLOGY, 2005, 65 (11-12) : 1703 - 1710
  • [7] Poly(3-hydroxybutyrate)/Bioglass® composite films containing carbon nanotubes
    Misra, S. K.
    Watts, P. C. P.
    Valappil, S. P.
    Silva, S. R. P.
    Roy, I.
    Boccaccini, A. R.
    [J]. NANOTECHNOLOGY, 2007, 18 (07)
  • [8] Corrosion performance of a two-step pre-treatment for galvanized steel based on lanthanum nitrate and silanes
    Montemor, MF
    Ferreira, MGS
    [J]. SURFACE AND INTERFACE ANALYSIS, 2004, 36 (08) : 773 - 776
  • [9] Optimization of commercial zirconic acid based pretreatment on hot-dip galvanized and Galfan coated steel
    Puomi, P
    Fagerholm, HM
    Rosenholm, JB
    Sipilä, R
    [J]. SURFACE & COATINGS TECHNOLOGY, 1999, 115 (01) : 79 - 86
  • [10] Corrosion protection by ultrathin films of conducting polymers
    Rammelt, U
    Nguyen, PT
    Plieth, W
    [J]. ELECTROCHIMICA ACTA, 2003, 48 (09) : 1257 - 1262
12