Microstructural characterization and corrosion resistance evaluation of chromate-phosphate/water-soluble resin composite conversion coating on Al surfaces

被引：19

作者：

Han, Xinchen ^{[1
]}

Li, Ning ^{[1
]}

Wu, Bo ^{[1
]}

Li, Deyu ^{[1
]}

Pan, Qinmin ^{[1
]}

Wang, Rui ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150001, Peoples R China

来源：

PROGRESS IN ORGANIC COATINGS | 2022年 / 173卷

关键词：

Aluminum; Conversion coating; Chromate-phosphate; Corrosion resistance; Multi-component conversion; STEAM VAPOR-PRESSURE; ALUMINUM-ALLOYS; ACCELERATED-GROWTH; OXIDE-FILM; CHROMIUM; CERIUM; CHEMISTRY; MECHANISM; PROTECTION; COMPLEXES;

D O I：

10.1016/j.porgcoat.2022.107205

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Chromate-phosphate/water-soluble resin composite conversion coatings (CP/RC) were prepared on the aluminum surface through a non-washing, dip coating-baking chemical conversion treatment method. Chromatephosphate conversion film (CP) and water-soluble resin conversion film (RC) were also prepared for comparison studies. The CP/RC surface was found to be the most homogeneous, with the strongest protection against aluminum, and was not corroded during a 20-day neutral salt spray (NSS) test and a 3.5 wt% NaCl immersion test. The analysis shows that CP/RC is mainly composed of three parts: the outermost covering layer with the resin as the main body (polymer, AlPO4, CrO3 and Cr2O3); the internal composite conversion layer composed of resin and inorganic skeleton (Al2O3, Cr2O3, CrO3, AlPO4, CrPO4, Al, AlF and polymer); the surface layer of aluminum substrate (Al, Al2O3 and AlPO4). XPS also shows that Cr6+ reacts with resin to form related compounds, which proves that the resin component and inorganic component in the coating are compounded.

引用

页数：11

共 66 条

[1]

Alexander MR, 1998, SURF INTERFACE ANAL, V26, P961, DOI 10.1002/(SICI)1096-9918(199812)26:13<961::AID-SIA432>3.0.CO

[2]

2-7

[3] Transmission Line Modeling of EIS Data for a Mg-Rich Primer on AA 2024-T3 [J].

Allahar, Kerry N. ;

Battocchi, Dante ;

Bierwagen, Gordon P. ;

Tallman, Dennis E. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2010, 157 (03) :C95-C101

[4] CHARACTERIZATION OF FERROCENE AND (ETA-6-BENZENE) TRICARBONYLCHROMIUM COMPLEXES BY X-RAY PHOTOELECTRON-SPECTROSCOPY [J].

ALLEN, GC ;

BUTLER, IS ;

KIRBY, C .

INORGANICA CHIMICA ACTA, 1987, 134 (02) :289-292

[5] AN X-RAY PHOTOELECTRON SPECTROSCOPIC STUDY OF ARENE CHROMIUM TRICARBONYL COMPLEXES AT 170 K [J].

BARNES, CM ;

KENNEDY, BJ .

JOURNAL OF MOLECULAR STRUCTURE, 1995, 344 (03) :233-240

[6] THE ADSORPTION AND DECOMPOSITION OF BIS(BENZENE)CHROMIUM ON NI(100) [J].

BLASS, PM ;

AKHTER, S ;

SEYMOUR, CM ;

LAGOWSKI, JJ ;

WHITE, JM .

SURFACE SCIENCE, 1989, 217 (1-2) :85-102

[7] Correlation between morphology and electrochemical behavior of chromium-free conversion coatings for aluminum alloys corrosion protection [J].

Boyer, Quentin ;

Ortega Vega, Maria R. ;

Malfatti, Celia de Fraga ;

Duluard, Sandrine ;

Ansart, Florence .

SURFACE & COATINGS TECHNOLOGY, 2018, 351 :115-127

[8] KINETICS, MECHANISM, AND THERMODYNAMICS OF AQUEOUS IRON(III) CHELATION AND DISSOCIATION - INFLUENCE OF CARBON AND NITROGEN SUBSTITUENTS IN HYDROXAMIC ACID LIGANDS [J].

BRINK, CP ;

CRUMBLISS, AL .

INORGANIC CHEMISTRY, 1984, 23 (26) :4708-4718

[9] 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

[10] Chromate conversion coating on aluminum alloys - III. Corrosion protection [J].

Campestrini, P ;

Terryn, H ;

Vereecken, J ;

de Wit, JHW .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (06) :B370-B377

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