Investigation of the microstructure, growth mechanism, and corrosion behavior of a new Zr-Ti conversion coating on 6016 aluminum alloy

被引：4

作者：

Zhang, Tongjin ^{[1
]}

Wang, Haiyao ^{[1
,2
]}

Li, Yong ^{[1
,3
]}

Qian, Xiaoming ^{[4
]}

Li, Beibei ^{[1
]}

Yu, Wei ^{[1
]}

Zhang, Xin ^{[1
]}

Lin, Jiayang ^{[1
]}

Tang, Hongqun ^{[5
]}

机构：

[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China

[2] Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110819, Peoples R China

[3] Guangxi Adv Aluminum Proc Innovat Ctr Co LTD, Nanning 530007, Peoples R China

[4] Yanshan Univ, Natl Engn Res Ctr Equipment & Technol Cold Strip R, Qinhuangdao 066004, Peoples R China

[5] State Key Lab Featured Met Mat & Life Cycle Safety, Nanning, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2024年 / 30卷

关键词：

6016 aluminum alloy; Conversion coating; Two-layer structure; Corrosion resistance; Corrosion behavior; PRETREATMENT; PERFORMANCE; PROTECTION; LAYERS; SALTS;

D O I：

10.1016/j.jmrt.2024.05.138

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel Zr-Ti conversion coating (ZrTiCC) was fabricated on 6016 aluminum alloy. The coating thickness was evaluated, and the corrosion resistance of the coating was investigated through CuSO4 4 drop experiments to determine the optimum process. Potentiodynamic polarization results revealed the corrosion current density of ZrTiCC (4.821 mu A/cm2) 2 ) was lower than that of bare specimen (12.263 mu A/cm2), 2 ), and the delta E of ZrTiCC (0.752V) was significantly lower than bare specimen (0.087 V). Scanning electron microscope and energy dispersive spectrometer was used to characterize the morphology and composition changes of the coating during its growth. The coating was proved to have a double-layer structure, and cracks appeared when the coating thickness continued to increase, which reduced the corrosion resistance. The growth mechanism of the coating was explained in detail. X-ray photoelectron spectroscopy was used to determine the components of the coating, which comprised Al2O3 2 O 3 at the base, with TiO2, 2 , AlF3, 3 , and ZrF4 4 at the top and ZrO2 2 evenly distributed throughout. Bode diagram revealed the impedance modulus of the coating at low frequency was increased to 8.6 x 104 4 Omega/cm2 2 after five days immersion in 0.5 M NaCl. The coating's self-sealing behavior and active protection may relate to the formation of SiO2, 2 , as well as the dissolution and regeneration of the upper coating (AlF3 3 and ZrF4) 4 ) on 6016 aluminum alloy.

引用

页码：7585 / 7596

页数：12

共 44 条

[1] Fluoride-Induced Interfacial Adhesion Loss of Nanoporous Anodic Aluminum Oxide Templates in Aerospace Structures [J].

Abrahami, S. T. ;

de Kok, J. M. M. ;

Gudla, V. C. ;

Marcoen, K. ;

Hauffman, T. ;

Ambat, R. ;

Mol, J. M. C. ;

Terryn, H. .

ACS APPLIED NANO MATERIALS, 2018, 1 (11) :6139-6149

[2] Hexafluorozirconic acid based surface pretreatments: Characterization and performance assessment [J].

Adhikari, Saikat ;

Unocic, K. A. ;

Zhai, Y. ;

Frankel, G. S. ;

Zimmerman, John ;

Fristad, W. .

ELECTROCHIMICA ACTA, 2011, 56 (04) :1912-1924

[3] Corrosion inhibition of AA6060 aluminium alloy by lanthanide salts in chloride solution [J].

Allachi, H. ;

Chaouket, F. ;

Draoui, K. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 475 (1-2) :300-303

[4] Effect of iron-containing intermetallic particles on the corrosion behaviour of aluminium [J].

Ambat, Rajan ;

Davenport, Alison J. ;

Scamans, Geoff M. ;

Afseth, Andreas .

CORROSION SCIENCE, 2006, 48 (11) :3455-3471

[5]

Birbilis N., 2006, ECS Trans, V1, P115, DOI [10.1149/1.2215495, DOI 10.1149/1.2215495]

[6] THE MORPHOLOGY, STRUCTURE AND MECHANISM OF GROWTH OF CHEMICAL CONVERSION COATINGS ON ALUMINUM [J].

BROWN, GM ;

SHIMIZU, K ;

KOBAYASHI, K ;

THOMPSON, GE ;

WOOD, GC .

CORROSION SCIENCE, 1992, 33 (09) :1371-1385

[7] The effect of Mg on the microstructure and mechanical behavior of Al-Si-Mg casting alloys [J].

Caceres, CH ;

Davidson, CJ ;

Griffiths, JR ;

Wang, QG .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (10) :2611-2618

[8] Influence of surface preparation on performance of chromate conversion coatings on Alclad 2024 aluminium alloy Part II: EIS investigation [J].

Campestrini, P ;

van Westing, EPM ;

de Wit, JHW .

ELECTROCHIMICA ACTA, 2001, 46 (17) :2631-2647

[9]

Caruana C. M., 2006, Metal Finishing, V104, P44, DOI 10.1016/S0026-0576(06)80206-0

[10] The effect of surface pre-conditioning treatments on the local composition of Zr-based conversion coatings formed on aluminium alloys [J].

Cerezo, J. ;

Vandendael, I. ;

Posner, R. ;

de Wit, J. H. W. ;

Mol, J. M. C. ;

Terryn, H. .

APPLIED SURFACE SCIENCE, 2016, 366 :339-347

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