Preparation and characterization of colored Ti/Zr conversion coating on AZ91D magnesium alloy

Yi, Aiping; Du, Jun; Wang, Jian; Mu, Songling; Zhang, Guoge; Li, Wenfang

doi:10.1016/j.surfcoat.2015.06.069

Cited by 44 publications

(21 citation statements)

References 49 publications

(58 reference statements)

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“…It is evident that Ti/Zr treatment results in a decrease of Al content from 92.56% to 38.38%, but an increase of C and O from 5.85% and 0.34% to 42.11% and 14.10%, respectively. The sharp increase of C could be due to the chemical reaction of tannic acid with Ti and Zr, indicating that a new conversion coating has formed on the Al foil surface.…”

Section: Resultsmentioning

confidence: 99%

Preparation and adhesive properties of colored Ti/Zr‐based conversion coating on aluminum foil for lithium battery packaging

Wang

2018

Surface & Interface Analysis

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In this study, an aluminum (Al) foil used for lithium ion battery packaging film was treated with titanium (Ti)/zirconium (Zr) solution containing hexafluorotitanic acid and hexafluorozirconic acid using tannic acid as a colorant and metavanadate as an accelerator, respectively, and a golden conversion coating was successfully deposited on the surface of Al foil. The morphology and composition of the coating were characterized by scanning electron microscopy, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy, and the hydrophilicity was assessed by contact angle measurement. The effect of Ti/Zr treatment on the adhesion properties of Al foil was evaluated by T-peeling test and compared with that of traditional chromate-phosphate treatment. The results show that tannic acid contributes to the formation of the golden coating, and metavanadate accelerates the formation of the conversion coating. The results also indicate that the Ti/Zrbased conversion coating is mainly composed of . The Ti/Zr treatment cannot only improve the heatsealing strength, but also the T-peeling strength by approximately 12 times compared with that of untreated Al foil. Thus, Ti/Zr treatment has the potential to replace the traditional chromate conversion treatment.

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Section: Resultsmentioning

confidence: 99%

Preparation and adhesive properties of colored Ti/Zr‐based conversion coating on aluminum foil for lithium battery packaging

Wang

2018

Surface & Interface Analysis

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“…Apart from various coating methods available in open literature [78][79][80][81][82][83], chemical conversion treatment was one of the famous coating methods due to its low cost and simple processes and was utilized in a study by Han et al [45] in 2017 to deposit Yttrium (Y) rare-earth compound on AZ91D. The AZ91D alloy with a composition of Mg-9.2Al-0.5Zn (wt.…”

Section: Lanthanidesmentioning

confidence: 99%

A Review: Thin Protective Coating for Wear Protection in High-Temperature Application

Awang

Khalili

Pedapati

2019

Metals

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Earning trust among high strength material industrialists for its sophistication, thin protective coating has gained its own maturity to date. As a result of active development in the industries, working tool has the capability of fabricating high strength materials with remarkable durability. For example, unwanted tool wear due to thermally softening problems can be avoided. Therefore, the solution for that is protecting the tool with a thin protective coating that can be coated by various coating deposition methods. With the thin protective coating itself possessing remarkable degree of chemical and mechanical properties, the combination of both makes the thin protective coating lead to a useful extend. This paper provides a review of various research activities and various developments in the wear prone industries. Researchers have explored a number of thin protective coatings for the last century to provide a valuable guide for a most practical option. With the state of the art development of the coating methods such as electrodepositing, radio frequency ion source implantation, electron beam implantation, plasma-sprayed coating deposition, flame-sprayed coating deposition, chemical catalytic reduction deposition, vacuum-diffused deposition, vapor deposition, chemical vapor deposition, physical vapor deposition, plasma arc deposition, and some others, this paper presents the continuous development on the enhancement of the capability of the working tool chronologically since the last century. Such development was studied in connection with the ability to outlast the performance of working tool, which elevates expectations that thin protective coatings are no longer extended far beyond.

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“…After 4 g/L NH 4 HF 2 or 8 g/L Na 12 Phy is added into the solution of 5 g/L K 2 ZrF 6 , anodic coatings still cannot develop (Figure 8e,f), demonstrating that K 2 ZrF 6 belongs to the corrosive agent of magnesium alloys. In fact, ZrF 6 2− is usually used to develop a conversion film on magnesium alloys [49]. Only under the combined action of NH 4 HF 2 and Na 12 Phy can K 2 ZrF 6 take part in coating formation and develop self-sealing coatings.…”

Section: Influence Of Processing Factors On Corrosion Resistancementioning

confidence: 99%

Investigation on Corrosion Resistance and Formation Mechanism of a P–F–Zr Contained Micro-Arc Oxidation Coating on AZ31B Magnesium Alloy Using an Orthogonal Method

et al. 2019

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In this study, the synergistic effects of NH4HF2, sodium phytate (Na12Phy), K2ZrF6, and treatment time on corrosion resistance of a micro-arc oxidation (MAO) treated magnesium alloy and the entrance mechanism of P, F, and Zr into anodic coatings were investigated using an orthogonal method. In addition, the roles of NH4HF2, Na12Phy, and K2ZrF6 on coating development were separately studied. The results show that NH4HF2 and Na12Phy, the corrosion inhibitors of magnesium alloys, are beneficial but K2ZrF6 is harmful to developing anodic coatings. The corrosion resistance of MAO coatings is synergistically determined by coating characteristics, though the coating thickness plays a main role. Na12Phy significantly improves but NH4HF2 decreases the corrosion resistance of MAO coatings, while excess high K2ZrF6 is harmful to the coating corrosion resistance. Treatment time can increase the coating thickness but is the least important factor in corrosion resistance. During MAO, NH4HF2, Na12Phy, and K2ZrF6 take part in coating formation, causing P, F, and Zr to compete with each other to enter into anodic coatings.

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Preparation and characterization of colored Ti/Zr conversion coating on AZ91D magnesium alloy

Cited by 44 publications

References 49 publications

Preparation and adhesive properties of colored Ti/Zr‐based conversion coating on aluminum foil for lithium battery packaging

Preparation and adhesive properties of colored Ti/Zr‐based conversion coating on aluminum foil for lithium battery packaging

A Review: Thin Protective Coating for Wear Protection in High-Temperature Application

Investigation on Corrosion Resistance and Formation Mechanism of a P–F–Zr Contained Micro-Arc Oxidation Coating on AZ31B Magnesium Alloy Using an Orthogonal Method

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