Corrosion resistance and microstructural characterization of Ti-Zr-V/waterborne resin composite conversion coating on 1060 aluminum alloy

Xinchen Han; Ning Li; Bo Wu; Tong Liu; Chengbin Lyu; Rui Wang; Deyu Li

doi:10.1016/j.colsurfa.2023.132503

Corrosion resistance and microstructural characterization of Ti-Zr-V/waterborne resin composite conversion coating on 1060 aluminum alloy

Xinchen Han
, Ning Li
, Bo Wu
, Tong Liu
, Chengbin Lyu
, Rui Wang^*
, Deyu Li

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
Tianjin Feige Group Joint Chemical Plant

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

A Ti-Zr-V/waterborne resin composite conversion coating (TZVRC) was prepared on an aluminum substrate using a simple and environmentally friendly coated-bake, non-washing one-step film-forming method. Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization curves, neutral salt spray (NSS) testing, and scanning electron microscopy (SEM) results indicated that TZVRC exhibited the best corrosion resistance and topcoat adhesion when the concentration of sodium orthovanadate in the composite conversion solution was 1 g/L. It also exhibited a relatively uniform and dense microstructure. The corrosion resistance of the coating is comparable to traditional chromate conversion coatings. The corrosion current density (i_corr) is 0.1426 μA/cm², the corrosion rate is 0.0015 mm/year, the coating resistance (R_c) reaches 384 kΩ·cm², and the coating thickness is approximately 0.4 µm. Attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) analysis revealed that the upper part of the coating primarily consisted of cured waterborne resin, while the bottom part was mainly composed of insoluble inorganic substances. Additionally, there were concentration gradient variations in the distribution of inorganic components within the lower part of the coating. Near the interface between the aluminum substrate and the bottom of the coating, the main components were Al, AlPO₄, Al₂O₃, and AlF₃, while the upper layer of the inorganic substances primarily consisted of TiO₂, ZrO₂, complexes of V ions, AlPO₄, Al₂O₃, and AlF₃. This composite conversion coating not only possesses excellent corrosion resistance but also eliminates the post-film washing step, streamlining the process. Additionally, the composite conversion system, which combines waterborne resin with inorganic components, offers a potential solution for the integration of chemical conversion coatings and primers on aluminum surfaces.

Original language	English
Article number	132503
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	678
DOIs	https://doi.org/10.1016/j.colsurfa.2023.132503
State	Published - 5 Dec 2023
Externally published	Yes

Keywords

Aluminum
Conversion coating
Corrosion resistance
Ti-Zr-V
Waterborne resin

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10.1016/j.colsurfa.2023.132503

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@article{76486e8ee60946ce85fc74bde3c3493c,

title = "Corrosion resistance and microstructural characterization of Ti-Zr-V/waterborne resin composite conversion coating on 1060 aluminum alloy",

abstract = "A Ti-Zr-V/waterborne resin composite conversion coating (TZVRC) was prepared on an aluminum substrate using a simple and environmentally friendly coated-bake, non-washing one-step film-forming method. Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization curves, neutral salt spray (NSS) testing, and scanning electron microscopy (SEM) results indicated that TZVRC exhibited the best corrosion resistance and topcoat adhesion when the concentration of sodium orthovanadate in the composite conversion solution was 1 g/L. It also exhibited a relatively uniform and dense microstructure. The corrosion resistance of the coating is comparable to traditional chromate conversion coatings. The corrosion current density (icorr) is 0.1426 μA/cm², the corrosion rate is 0.0015 mm/year, the coating resistance (Rc) reaches 384 kΩ·cm², and the coating thickness is approximately 0.4 µm. Attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) analysis revealed that the upper part of the coating primarily consisted of cured waterborne resin, while the bottom part was mainly composed of insoluble inorganic substances. Additionally, there were concentration gradient variations in the distribution of inorganic components within the lower part of the coating. Near the interface between the aluminum substrate and the bottom of the coating, the main components were Al, AlPO4, Al2O3, and AlF3, while the upper layer of the inorganic substances primarily consisted of TiO2, ZrO2, complexes of V ions, AlPO4, Al2O3, and AlF3. This composite conversion coating not only possesses excellent corrosion resistance but also eliminates the post-film washing step, streamlining the process. Additionally, the composite conversion system, which combines waterborne resin with inorganic components, offers a potential solution for the integration of chemical conversion coatings and primers on aluminum surfaces.",

keywords = "Aluminum, Conversion coating, Corrosion resistance, Ti-Zr-V, Waterborne resin",

author = "Xinchen Han and Ning Li and Bo Wu and Tong Liu and Chengbin Lyu and Rui Wang and Deyu Li",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = dec,

day = "5",

doi = "10.1016/j.colsurfa.2023.132503",

language = "英语",

volume = "678",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

issn = "0927-7757",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Corrosion resistance and microstructural characterization of Ti-Zr-V/waterborne resin composite conversion coating on 1060 aluminum alloy

AU - Han, Xinchen

AU - Li, Ning

AU - Wu, Bo

AU - Liu, Tong

AU - Lyu, Chengbin

AU - Wang, Rui

AU - Li, Deyu

PY - 2023/12/5

Y1 - 2023/12/5

N2 - A Ti-Zr-V/waterborne resin composite conversion coating (TZVRC) was prepared on an aluminum substrate using a simple and environmentally friendly coated-bake, non-washing one-step film-forming method. Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization curves, neutral salt spray (NSS) testing, and scanning electron microscopy (SEM) results indicated that TZVRC exhibited the best corrosion resistance and topcoat adhesion when the concentration of sodium orthovanadate in the composite conversion solution was 1 g/L. It also exhibited a relatively uniform and dense microstructure. The corrosion resistance of the coating is comparable to traditional chromate conversion coatings. The corrosion current density (icorr) is 0.1426 μA/cm², the corrosion rate is 0.0015 mm/year, the coating resistance (Rc) reaches 384 kΩ·cm², and the coating thickness is approximately 0.4 µm. Attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) analysis revealed that the upper part of the coating primarily consisted of cured waterborne resin, while the bottom part was mainly composed of insoluble inorganic substances. Additionally, there were concentration gradient variations in the distribution of inorganic components within the lower part of the coating. Near the interface between the aluminum substrate and the bottom of the coating, the main components were Al, AlPO4, Al2O3, and AlF3, while the upper layer of the inorganic substances primarily consisted of TiO2, ZrO2, complexes of V ions, AlPO4, Al2O3, and AlF3. This composite conversion coating not only possesses excellent corrosion resistance but also eliminates the post-film washing step, streamlining the process. Additionally, the composite conversion system, which combines waterborne resin with inorganic components, offers a potential solution for the integration of chemical conversion coatings and primers on aluminum surfaces.

AB - A Ti-Zr-V/waterborne resin composite conversion coating (TZVRC) was prepared on an aluminum substrate using a simple and environmentally friendly coated-bake, non-washing one-step film-forming method. Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization curves, neutral salt spray (NSS) testing, and scanning electron microscopy (SEM) results indicated that TZVRC exhibited the best corrosion resistance and topcoat adhesion when the concentration of sodium orthovanadate in the composite conversion solution was 1 g/L. It also exhibited a relatively uniform and dense microstructure. The corrosion resistance of the coating is comparable to traditional chromate conversion coatings. The corrosion current density (icorr) is 0.1426 μA/cm², the corrosion rate is 0.0015 mm/year, the coating resistance (Rc) reaches 384 kΩ·cm², and the coating thickness is approximately 0.4 µm. Attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) analysis revealed that the upper part of the coating primarily consisted of cured waterborne resin, while the bottom part was mainly composed of insoluble inorganic substances. Additionally, there were concentration gradient variations in the distribution of inorganic components within the lower part of the coating. Near the interface between the aluminum substrate and the bottom of the coating, the main components were Al, AlPO4, Al2O3, and AlF3, while the upper layer of the inorganic substances primarily consisted of TiO2, ZrO2, complexes of V ions, AlPO4, Al2O3, and AlF3. This composite conversion coating not only possesses excellent corrosion resistance but also eliminates the post-film washing step, streamlining the process. Additionally, the composite conversion system, which combines waterborne resin with inorganic components, offers a potential solution for the integration of chemical conversion coatings and primers on aluminum surfaces.

KW - Aluminum

KW - Conversion coating

KW - Corrosion resistance

KW - Ti-Zr-V

KW - Waterborne resin

UR - https://www.scopus.com/pages/publications/85173248303

U2 - 10.1016/j.colsurfa.2023.132503

DO - 10.1016/j.colsurfa.2023.132503

M3 - 文章

AN - SCOPUS:85173248303

SN - 0927-7757

VL - 678

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

M1 - 132503

ER -

Corrosion resistance and microstructural characterization of Ti-Zr-V/waterborne resin composite conversion coating on 1060 aluminum alloy

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Keywords

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