A high-performance Ti-Zr Based Chromium-Free Conversion Coating on 2024 Aluminum Alloy

被引：6
作者：
Li, Q. P. [1 ,2 ]
Yan, Z. Q. [2 ,3 ]
Xu, Q. [1 ]
Zhang, B. [2 ]
Sun, S. [3 ]
Liu, J. G. [2 ]
Yan, C. W. [2 ]
机构：
[1] Northeastern Univ, Sch Met, Shenyang 110142, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Shenyang 110016, Peoples R China
[3] Shenyang Univ Technol, Sch Sci, Shenyang 110870, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2016年 / 11卷 / 12期
关键词：
2024 aluminum alloy; Benzimidazole; Ti-Zr conversion coating; Corrosion resistance; BENZOTRIAZOLE; PROTECTION;
D O I：
10.20964/2016.12.39
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In order to further improve the corrosion resistance of the chromium-free Ti-Zr conversion coating on 2024 aluminum alloy (AA2024), a novel Ti-Zr based conversion coating on AA2024 is successfully prepared by introducing the cathodic inhibitor of benzimidazole into the Ti-Zr conversion solution. After the conversion treatment, AA2024 substrate is well covered with the porous Ti-Zr conversion coating composed of the micron-sized particles. And the Ti-Zr conversion coating mainly consists of the metallic oxide (TiO2, ZrO2, Al2O3), metallic fluoride (ZrF4 and AlF3) and C-N complex. More important is that there are no apparent corrosion products or detects could be observed during the whole 168 h NSS test, indicating the significantly excellent corrosion resistance for AA2024 with Ti-Zr conversion coating compared with other chrome-free conversion coatings. The electrochemical measurements indicate the corrosion resistance of the Ti-Zr conversion coating is not so outstanding at the initial stage, what is worth cherishing is that its anti-corrosion property is gradually improving in the following period. Therefore, the Ti-Zr conversion coating with excellent corrosion resistance might be a promising high-performance protective coating for AA2024 compared with other chrome-free conversion coating.
引用
收藏
页码：10675 / 10689
页数：15
相关论文
共 19 条
[1]   Chromate conversion coating on aluminum alloys - I. Formation mechanism [J].
Campestrini, P ;
Goeminne, G ;
Terryn, H ;
Vereecken, J ;
de Wit, JHW .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (02) :B59-B70
[2]   Corrosion behaviour of a 2219 aluminium alloy treated with a chromate conversion coating exposed to a 3.5% NaCl solution [J].
Grilli, Rossana ;
Baker, Mark A. ;
Castle, James E. ;
Dunn, Barrie ;
Watts, John F. .
CORROSION SCIENCE, 2011, 53 (04) :1214-1223
[3]   Environmentally compliant silica conversion coatings prepared by sol-gel method for aluminum alloys [J].
Hamdy, Abdel Salam ;
Butt, D. P. .
SURFACE & COATINGS TECHNOLOGY, 2006, 201 (1-2) :401-407
[4]   On the growth of conversion chromate coatings on 2024-Al alloy [J].
Kulinich, S. A. ;
Akhtar, A. S. ;
Susac, D. ;
Wong, P. C. ;
Wong, K. C. ;
Mitchell, K. A. R. .
APPLIED SURFACE SCIENCE, 2007, 253 (06) :3144-3153
[5]  
[刘宁华 Liu Ninghua], 2010, [表面技术, Surface Technology], V39, P45
[6]   Structure and corrosion behavior of sputter deposited cerium oxide based coatings with various thickness on Al 2024-T3 alloy substrates [J].
Liu, Yuanyuan ;
Huang, Jiamu ;
Claypool, James B. ;
Castano, Carlos E. ;
O'Keefe, Matthew J. .
APPLIED SURFACE SCIENCE, 2015, 355 :805-813
[7]   Formation of a zirconium-titanium based conversion layer on AA 6060 aluminium [J].
Nordlien, JH ;
Walmsley, JC ;
Osterberg, H ;
Nisancioglu, K .
SURFACE & COATINGS TECHNOLOGY, 2002, 153 (01) :72-78
[8]   Silica mesoporous thin films as containers for benzotriazole for corrosion protection of 2024 aluminium alloys [J].
Recloux, Isaline ;
Mouanga, Maixent ;
Druart, Marie-Eve ;
Paint, Yoann ;
Olivier, Marie-Georges .
APPLIED SURFACE SCIENCE, 2015, 346 :124-133
[9]   Chromium-free conversion coatings based on inorganic salts (Zr/Ti/Mn/Mo) for aluminum alloys used in aircraft applications [J].
Santa Coloma, P. ;
Izagirre, U. ;
Belaustegi, Y. ;
Jorcin, J. B. ;
Cano, F. J. ;
Lapena, N. .
APPLIED SURFACE SCIENCE, 2015, 345 :24-35
[10]   Protection of 2024-T3 aluminium alloy by corrosion resistant phytic acid conversion coating [J].
Shi, Hongwei ;
Han, En-Hou ;
Liu, Fuchun ;
Kallip, Silvar .
APPLIED SURFACE SCIENCE, 2013, 280 :325-331
12