Investigation on adhesion strength and corrosion resistance of Ti-Zr aminotrimethylene phosphonic acid composite conversion coating on 7A52 aluminum alloy

Liu, Qi; Cao, Xiaoming; Du, An; Ma, Ruina; Zhang, Xiaoran; Shi, Tingting; Fan, Yongzhe; Zhao, Xue

doi:10.1016/j.apsusc.2018.07.044

Cited by 36 publications

(29 citation statements)

References 45 publications

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“…Researchers have discussed the properties and coating‐formation mechanism of aluminum alloy titanium/zirconium conversion coating, rare earth conversion coating, permanganate conversion coating, vanadate conversion coating, organosilane membrane, and so forth . Lunder et al focused on the effect of intermetallic particles, agitation, and pH on the formation and growth of Ti/Zr conversion coating on 6060 aluminum alloy, pointing out that the presence of α–Al (Fe, Mn) Si intermetallic particles is critical for the formation of conversion coatings.…”

Section: Introductionmentioning

confidence: 99%

Preparation and corrosion resistance of titanium–zirconium–cerium based conversion coating on 6061 aluminum alloy

Wang

Qian

Gui

et al. 2019

Materials & Corrosion

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This paper aims to develop a chromium‐free chemical conversion coating with good corrosion resistance. A novel chemical conversion coating was prepared on 6061 aluminum alloy by dipping in the treatment solution containing titanium/zirconium based‐ions and sodium metaphosphate and cerium nitrate hexahydrate as additives. The morphology and composition of the conversion coatings were observed by scanning electron microscopy and energy dispersive X‐ray spectroscopy. The microarea structure of conversion coatings at different formation stages was analyzed by electron probe microanalyzer. The electrochemical polarization curve revealed that the corrosion potential of the conversion coating was −0.577 V and the corrosion current density was 0.1148 μA/cm2. The equivalent circuit fitted by AC impedance showed that the film resistance reaches 68,140 Ω. The formation of coating preferentially grows on the Al (Fe) Si intermetallic to form oxides of Ti and Zr; then TiO2 formed by a higher concentration of Ti4+ gradually covered ZrO2. Ce3+ could adsorb on the intermetallic compound, the hydrolysis of which causes the local pH of the solution to decrease and promotes the aluminum alloy dissolved.

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Section: Introductionmentioning

confidence: 99%

Preparation and corrosion resistance of titanium–zirconium–cerium based conversion coating on 6061 aluminum alloy

Wang

Qian

Gui

et al. 2019

Materials & Corrosion

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“…Figure 9b shows the typical Nyquist plots of the Ni-SiC composite coatings. A depressive semicircle can be found on each curve, indicating that the electrochemical mechanism is controlled by the charge-transfer process [30]. It can be seen that the diameter of capacitive loop increases with the increases of TC(220) of Ni-SiC composite coating.…”

Section: 3mentioning

confidence: 82%

“…Angle of the Ni-SiC composite coatings. For the Ni-SiC composite coatings, the higher phase angle at middle high frequency for the chemical conversion treated specimen corresponds to a capacitive behavior, that is to say the conversion coating has good dielectric property to avoid the ionic flow of electrolyte [30]. When the frequency is in the range of 10 0~1 0 5 Hz, the phase angle of Ni-SiC composite coating prepared by CED is minimum, and the phase angle of Ni-SiC composite coating prepared by JED increases with the increase of TC(220).…”

Section: 3mentioning

confidence: 99%

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Efficient Preparation of Nanoparticles Reinforced Nickel-based Composite Coating with Highly Preferred (220) Orientation

Jin

Liu

et al. 2020

Preprint

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Nanoparticles reinforced metal matrix composite coatings have great application potential in mechanical parts surface strengthening due to their excellent mechanical properties. This paper reports a phenomenon that the grain orientation gradually evolves to (220) with the deposition current density increasing when preparing nanoparticles reinforced nickel-based composite coatings by jet electrodeposition (JED). During the preparation of Ni-SiC composite coatings, the deposition current density increases from 180 A/dm2 to 220 A/dm2, and TC(220) gradually increases from 41.4% to 97.7% correspondingly. With the increase of TC(220), the self-corrosion potential increases from -0.575 V to -0.477 V, the corrosion current density decreases from 9.52 μA·cm2 to 2.76 μA·cm2, the diameter of corrosion pits that after 10 days of immersion in 3.5 wt% NaCl solution decreases from 278~944 nm to 153~260 nm, and the adhesion of the coating is increased from 24.9 N to 61.6 N. Compared with conventional electrodeposition (CED), the Ni-SiC composite coating prepared by JED has the advantages of smooth surface morphology, corrosion resistance and strong adhesion, which is more obvious with the increase of TC (220).

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“…When the value of n is 1, the CPE is a pure capacitor with a capacitance of Y0. It is believed that the smaller the n value is and the more defects will be on the surface as well as the pitting corrosion is more likely to occur [25,27].…”

Section: (Location Of Figure 5)mentioning

confidence: 99%

Efficient Preparation of Nanoparticles Reinforced Nickel-based Composite Coating with Highly Preferred (220) Orientation

Jin

Liu

et al. 2020

Preprint

View full text Add to dashboard Cite

This paper reports a phenomenon that the grain orientation gradually evolves to (220) with the deposition current density increasing when preparing nanoparticles reinforced nickel-based composite coatings by jet electrodeposition (JED). During the preparation of Ni-SiC composite coatings, the deposition current density increases from 180 A/dm2 to 220 A/dm2, and TC(220) gradually increases from 41.4% to 97.7% correspondingly.The Ni-SiC composite coating with highly preferred (220) orientation has superior corrosion resistance and adhesion force. With the increase of TC(220), the surface roughness is reduced from Ra1.210 μm to Ra0.119 μm, the self-corrosion potential increases from -0.747 V to -0.477 V, the corrosion current density decreases from 54.52 μA·cm2 to 2.76 μA·cm2, the diameter of corrosion pits that after 10 days of immersion in 3.5 wt% NaCl solution decreases from 3.3~22.2 μm to 153~260 nm, and the adhesion of the coating is increased from 20.5 N to 61.6 N.The research results can provide theoretical and technical support for the preparation of new composite coatings with high efficiency, low cost, high adhesion and strong corrosion resistance.

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Investigation on adhesion strength and corrosion resistance of Ti-Zr aminotrimethylene phosphonic acid composite conversion coating on 7A52 aluminum alloy

Cited by 36 publications

References 45 publications

Preparation and corrosion resistance of titanium–zirconium–cerium based conversion coating on 6061 aluminum alloy

Preparation and corrosion resistance of titanium–zirconium–cerium based conversion coating on 6061 aluminum alloy

Efficient Preparation of Nanoparticles Reinforced Nickel-based Composite Coating with Highly Preferred (220) Orientation

Efficient Preparation of Nanoparticles Reinforced Nickel-based Composite Coating with Highly Preferred (220) Orientation

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