Recent Advancements in Corrosion Protection of Magnesium Alloys by Silane-Based Sol–Gel Coatings

Talha, Mohd; Ma, Yucong; Xu, Mingjie; Wang, Qi; Lin, Yuanhua; Kong, Xiangwei

doi:10.1021/acs.iecr.0c03368

Cited by 49 publications

(25 citation statements)

References 158 publications

(272 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pure inorganic sol-gel coatings have been studied as an inert physical barrier to provide protection against corrosion. However, inorganic sol-gel coatings have some limitations such as: (i) brittleness, shrinkage, and internal stress after heat treatment process, and (ii) the high temperature required to sinter the coating that mismatches with the thermal expansion coefficient of Mg substrate [27]. A great effort has been made to incorporate organo-alkoxysilanes into the sol-gel synthesis to obtain crackfree hybrid coatings able to be sintered at lower temperatures (below 200°C, depending on Mg alloys) close to the thermal expansion coefficient of Mg substrate [28].…”

Section: Passive Sol-gel Coating Barriermentioning

confidence: 99%

The Role of Silane Sol-Gel Coatings on the Corrosion Protection of Magnesium Alloys

Merino¹,

Durán²,

Castro³

2022

Current Trends in Magnesium (Mg) Research

View full text Add to dashboard Cite

Magnesium alloys, as the lightest structural metallic material with promising physical, mechanical, and biodegradable properties, have become very attractive for different technical applications, especially for industrial and biomedical fields. However, rapid corrosion is the most critical obstacle that limits its use to play a major role in large-scale applications. The simplest way to control the corrosion rate is to prevent a direct contact of the magnesium substrate with the environment by using surface modification technologies. Silica sol-gel coatings are considered a promising solution to enhance the corrosion resistance of magnesium alloys because sol-gel-based coating systems form very stable chemical bonds with the metallic surface. In this chapter, an insight about the advances in silica sol-gel coatings as an alternative method to control the corrosion of Mg and its alloys will be exposed. A wide overview of the most relevant aspects and their current applications, specifically for aerospace, automobile, and biomedical applications will be described. The modification of silica sol-gel matrix by the incorporation of different types of inhibitors to achieve an active barrier property on Mg alloys has been also considered. Finally, the future perspective based on the development of new silica sol-gel coatings on Mg alloy will be presented.

show abstract

Section: Passive Sol-gel Coating Barriermentioning

confidence: 99%

The Role of Silane Sol-Gel Coatings on the Corrosion Protection of Magnesium Alloys

Merino¹,

Durán²,

Castro³

2022

Current Trends in Magnesium (Mg) Research

View full text Add to dashboard Cite

show abstract

“…Silane-based anticorrosive coatings of Mg alloys have been proven to be effective, economical and environmentally friendly [98]. A review of recent advancements in corrosion protection of magnesium alloys by silane-based sol-gel coatings are reported in [99]. The addition of corrosion inhibitors may further increase their corrosion resistance [99].…”

Section: Hexavalent Chromium (Cr +6 ) Based Systemsmentioning

confidence: 99%

“…A review of recent advancements in corrosion protection of magnesium alloys by silane-based sol-gel coatings are reported in [99]. The addition of corrosion inhibitors may further increase their corrosion resistance [99]. Organosilane coatings will be more widely discussed in the next Section.…”

Section: Hexavalent Chromium (Cr +6 ) Based Systemsmentioning

confidence: 99%

See 1 more Smart Citation

Promising Methods for Corrosion Protection of Magnesium Alloys in the Case of Mg-Al, Mg-Mn-Ce and Mg-Zn-Zr: A Recent Progress Review

Predko

Rajnović

Grilli

et al. 2021

Metals

View full text Add to dashboard Cite

High specific strength characteristics make magnesium alloys widely demanded in many industrial applications such as aviation, astronautics, military, automotive, bio-medicine, energy, etc. However, the high chemical reactivity of magnesium alloys significantly limits their applicability in aggressive environments. Therefore, the development of effective technology for corrosion protection is an urgent task to ensure the use of magnesium-containing structures in various fields of application. The present paper is aimed to provide a short review of recent achievements in corrosion protection of magnesium alloys, both surface treatments and coatings, with particular focus on Mg-Al-Mn-Ce, Mg-Al-Zn-Mn and Mg-Zn-Zr alloys, because of their wide application in the transport industry. Recent progress was made during the last decade in the development of protective coatings (metals, ceramics, organic/polymer, both single layers and multilayer systems) fabricated by different deposition techniques such as anodization, physical vapour deposition, laser processes and plasma electrolytic oxidation.

show abstract

“…Hybrid inorganic-organic solgel coatings were established by attaching titanium or zirconium alkoxides to the silica matrix and it was shown to have improved adhesion, specifically on Magnesium substrate. 9 Recently, intrinsically healable polymers that use reversible covalent bonds have been used in the sol-gel formulations to improve the long-term barrier properties in. 1 Functional sol-gel based coating with improved wettability, transparency, and abrasion resistance, in addition to anti-corrosion properties, are a developing field of research.…”

Section: Chapter 1: Introductionmentioning

confidence: 99%

Scalable Corrosion-Resistant Coatings for Thermal Applications

Khodakarami

Zhao

Rabbi

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Corrosion of metallic substrates is a problem for a variety of applications. Corrosion can be mitigated with the use of an electrically insulating coating protecting the substrate. Thick millimetric coatings, such as paints, are generally more corrosion-resistant when compared to nanoscale coatings. However, for thermal systems, thick coatings are undesirable due to the resulting decrease in the overall heat transfer stemming from the added coating thermal resistance. Hence, the development of ultrathin (<10 μm) coatings is of great interest. Ultrathin inorganic silicon dioxide (SiO2) coatings applied by sol–gel chemistries or chemical vapor deposition, as well as organic coatings such as Parylene C, have great anticorrosion performance due to their high dielectric breakdown and low moisture permeability. However, their application to arbitrarily shaped metals is difficult or expensive. Here, we develop a sol–gel solution capable of facile and controllable dip coating on arbitrary metals, resulting in a very smooth (<5 nm roughness), thin (∼3 μm), and conformal coating of dense SiO2. To benchmark our material, we compared the corrosion performance with in-house synthesized superhydrophobic aluminum and copper samples, Parylene C-coated substrates, and smooth hydrophobic surfaces functionalized with a hydrophobic self-assembled monolayer. For comparison with state-of-the-art commercial coatings, copper substrates were coated with an organo-ceramic SiO2 layer created by an elevated temperature and atmospheric pressure metal organic chemical vapor deposition process. To characterize corrosion performance, we electrochemically investigated the corrosion resistance of all samples through potentiodynamic polarization studies and electrochemical impedance spectroscopy. To benchmark the coating durability and to demonstrate scalability, we tested internally coated copper tubes in a custom-built corrosion flow loop to simulate realistic working conditions with shear and particulate saltwater flow. The sol–gel and Parylene C coatings demonstrated a 95% decrease in corrosion rate during electrochemical tests. Copper tube weight loss was reduced by 75% for the sol–gel SiO2-coated tubes when seawater was used as the corrosive fluid in the test loop. This work not only demonstrates scalable coating methodologies for applying ultrathin anticorrosion coatings but also develops mechanistic understanding of corrosion mechanisms on a variety of functional surfaces and substrates.

show abstract

Recent Advancements in Corrosion Protection of Magnesium Alloys by Silane-Based Sol–Gel Coatings

Cited by 49 publications

References 158 publications

The Role of Silane Sol-Gel Coatings on the Corrosion Protection of Magnesium Alloys

The Role of Silane Sol-Gel Coatings on the Corrosion Protection of Magnesium Alloys

Promising Methods for Corrosion Protection of Magnesium Alloys in the Case of Mg-Al, Mg-Mn-Ce and Mg-Zn-Zr: A Recent Progress Review

Scalable Corrosion-Resistant Coatings for Thermal Applications

Contact Info

Product

Resources

About