Article
Materials Science, Coatings & Films
Shuai Zhang, Cheng Wang, Sixu Zhao, Anqi Niu, Yinlong Ma, Baochang Liu
Summary: The novel cerium-based conversion (CeC) treatment was performed on 2A14-T3511 aluminum alloy micro-arc oxidation (MAO) coatings with thicknesses of 15 μm and 30 μm. The sealing effect and chemical composition of the sealant were characterized, and the influence of coating structure on the deposition of cerium compounds was discussed. Long-term corrosion behavior was investigated using electrochemical methods. The results showed that CeC treatment significantly improved the long-term corrosion protection of MAO coatings, attributed to the physical sealing and chemical corrosion inhibition of the Ce-based deposits.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Rene Boettcher, Adriana Ispas, Andreas Bund
Summary: Aluminum needs to be alloyed to achieve effective cathodic corrosion protection under mild atmospheric conditions due to the formation of an insulating oxide layer. Aluminum alloys with Cr, Zn, and Sn have been studied and their corrosion behavior and protection capabilities investigated. Pure aluminum provides excellent corrosion protection in chloride-containing environments, but not under ambient conditions. Alloys with zinc provide superior corrosion protection compared to aluminum, while alloys with tin show high activity and rapid dissolution. Alloying aluminum is necessary to achieve effective cathodic corrosion protection under mild atmospheric conditions.
Article
Materials Science, Multidisciplinary
Xueping Chen, Jianhua Tang, Han Wei, Hanlu Zhang, Yuming Tang, Xuhui Zhao, Yu Zuo
Summary: The inhibitory effect and mechanism of cerium tartrate as a pigment in epoxy coating on AA2024-T3 aluminum alloy in a NaCl solution were studied. The addition of cerium tartrate significantly improved the protective performance of the epoxy coating, possibly due to the modification effect by cerium salts and the synergistic inhibitory effect by tartrate group and cerium ions. The double-layer coating showed similar protective properties to the single-layer coating, indicating that creating a protective film on the aluminum alloy substrate can contribute to improving the protection performance of the coating.
Article
Chemistry, Analytical
Louis Godeffroy, Aleksei Makogon, Sarra Gam Derouich, Frederic Kanoufi, Viacheslav Shkirskiy
Summary: In this study, the communication within particle agglomerates in industrial alloys was investigated using correlated optical microscopies and scanning electron microscopy. The optical operando analyses allowed for the quantification of local production of OH- and the chemical communication between active sites within a few micrometer range, providing insights into the structure reactivity of particle agglomerates.
ANALYTICAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Aleksey Abrashov, Nelya Grigoryan, Yuri Korshak, Tigran Vagramyan, Oleg Grafov, Yaroslav Mezhuev
Summary: It has been shown that solutions of stearic acid in a dimethyl sulfoxide-water binary mixture can create superhydrophobic protective coatings on an aluminum alloy surface, with good protective effects. These coatings, with a multimodal micro-rough surface, can enhance protective ability under certain conditions.
Article
Chemistry, Applied
Zhou Zhou, Chenpei Li, Ruiyu Wang, Hai Tao, Dingli Yang, Siyi Qin, Xin Meng, Changlu Zhou
Summary: The study found that a complete curing crosslinking structure with high crosslinking degree contributes to better corrosion protection performance in the coating. Additionally, the hydrophobicity of the coating is also an important factor affecting corrosion protection performance.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Coatings & Films
Yuanyong Ouyang, Zhihao Chen, Chunyun Jiang, Wenzhong Yang, Yun Chen, Xiaoshuang Yin, Ying Liu
Summary: A double-layer composite coating was prepared on AZ31 Mg alloys, consisting of disorderly distributed nanofibers and PO43- groups; the coating exhibited high bonding strength and reduced corrosion rate, showing great potential in orthopedic applications.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Farshad Bahremand, Taghi Shahrabi, Bahram Ramezanzadeh, Seyed Ali Hosseini
Summary: One application of organic compounds is to utilize them as corrosion inhibitors in acidic environments to diminish steel corrosion. These inhibitors do not show very good inhibition properties in saline (NaCl) environments. There have been many studies on boosting these inhibitors' performance in such environments (especially Cl- containing media). One of the ways that have been proposed is the use of organic and inorganic inhibitors, simultaneously. The synergistic effect of these inhibitors has shown promising results in reducing steel corrosion.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Mingdong Wu, Daihong Xiao, Xinkai Wang, Lanping Huang, Wensheng Liu
Summary: The effects of Zn contents on the mechanical properties, corrosion behaviors, and microstructural evolution of extruded Al-Li-Cu-Mg-Ag alloys were investigated. Increasing Zn contents can accelerate hardening kinetics, improve hardness, and enhance corrosion resistance. The addition of 0.57 wt.% Zn to the alloy showed the best combination of tensile strength and corrosion resistance.
Article
Green & Sustainable Science & Technology
Jose Antonio Cabello Mendez, Jose de Jesus Perez Bueno, Yunny Meas Vong, Benjamin Portales Martinez
Summary: This study investigates the formation of cerium hydroxide and evaluates its capacity as a corrosion inhibitor on aluminum substrates. By immersing the substrate in a solution of cerium nitrate and hydrogen peroxide, the cerium particles are deposited on the surface. The morphological and chemical analysis of the coatings were performed, and the electrochemical corrosion behavior was studied. The results show that the presence of cerium particles can both inhibit and promote corrosion, depending on the immersion time and concentration.
Article
Chemistry, Analytical
Yuanjiao Li, Alban Morel, Danick Gallant, Janine Mauzeroll
Summary: The applied approach potential in single-channel scanning electrochemical cell microscopy affects the interaction between the probe and substrate, as well as subsequent microscale electrochemical measurements.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Haruno Yanagimoto, Koki Saito, Hideaki Takahashi, Makoto Chiba
Summary: This study investigates the structure and corrosion protection ability of porous anodic oxide films on pure Al and Al alloys, and finds that pure Al has a smooth surface after pore sealing, while cracks form on Al alloys. Corrosion protection is enhanced with longer anodizing time for pure Al, but only slightly for Al alloys.
Review
Chemistry, Physical
Robert Buckingham, Tristan Asset, Plamen Atanassov
Summary: Research on high theoretical energy density metal battery anode materials, such as aluminum in Al-air batteries, has been ongoing for several decades. Despite the attractive properties of aluminum such as light weight and low cost, commercialization has been impeded by challenges such as aluminum hydroxide surface barrier formation, high corrosion rate, and self-discharge susceptibility. Many studies have explored the use of alloying elements to address these issues in aqueous electrolytes.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Applied
Zhou Zhou, Juan Liu, Xin Meng, Changlu Zhou
Summary: A series of sol-gel coatings based on TEOS were used to provide corrosion protection for aluminum alloys AA1060. The addition of silane-functionalized benzoxazine (Bz) improved the hydrophobicity and corrosion resistance of the sol-gel coatings. The Bz-based sol-gel coatings showed better performance than the control coating in a 30-day test, demonstrating their effective protective property for aluminum alloys.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Frank Czerwinski
Summary: The strength retention of Al-Ce binary alloys at high temperatures was assessed compared to A380 alloy and pure Al. The Al11Ce3 eutectic and proeutectic phases were found to have limited effectiveness in strengthening Al-Ce alloys at room temperature and retaining their strength at increased temperatures. Despite the high hardness retention ratio of Al-Ce alloys, the yield stress decreased with testing temperatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Paul J. Denissen, Viacheslav Shkirskiy, Polina Volovitch, Santiago J. Garcia
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Polymer Science
Linda Ritzen, Vincenzo Montano, Santiago J. Garcia
Summary: The study focused on utilizing self-healing polymers for 3D printing and investigating their mechanical properties and self-healing behavior. The complete process demonstrated that the 3D printed self-healing polyurethane exhibited similar performance to the bulk material.
Article
Materials Science, Multidisciplinary
Emanuele Rossi, Hongzhi Zhang, Santiago J. Garcia, Johan Bijleveld, Timo G. Nijland, Oguzhan Copuroglu, Rob B. Polder, Branko Savija
Summary: The study investigated the elastic modulus of naturally-generated chloride-induced corrosion products in different concrete mixes. Microstructural characterization was carried out using nano-indentation, electron microscopy, and Raman spectroscopy. The results showed that the corrosion products consist mainly of a goethite matrix with portions of maghemite, and the elastic modulus varied between 80-100 GPa.
Article
Materials Science, Multidisciplinary
Matteo Olgiati, Paul J. Denissen, Santiago J. Garcia
Summary: A hyphenated optical-electrochemical technique and image analysis protocol were used to quantify global and local corrosion processes of intermetallic compounds (IMs). The study found an early composition-dependent activation of IMs attributed to dealloying, followed by trenching initiated at matrix locations adjacent to previously dealloyed IMs, leading to concentric trenching. Dealloying kinetics were composition-dependent while trenching kinetics were composition and size independent for IMs.
Article
Electrochemistry
A. M. Homborg, M. Olgiati, P. J. Denissen, S. J. Garcia
Summary: This work investigates the effectiveness and durability of an anodic and cathodic corrosion inhibitor through integrated analysis of in-situ optical data and time-frequency information from electrochemical potential noise data. The results show that neither cerium(III) nor phytic acid can effectively inhibit the corrosion of aluminum alloy. This study effectively distinguishes the time-variant changes between corrosion, inhibitor activity, inhibited state, and re-activation.
ELECTROCHIMICA ACTA
(2022)
Article
Materials Science, Coatings & Films
Paul J. Denissen, Axel M. Homborg, Santiago J. Garcia
Summary: This study uses a diffusion-driven inhibitor transport model to aid in the design of inhibitor-loaded carriers for anticorrosive primers. The results show that nano-particles can only protect small damages of micron size dimensions, while micron-sized carriers allow for sufficient release to protect larger damages at lower pigment volume concentrations.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
V Montano, M. W. Urban, S. van der Zwaag, S. J. Garcia
Summary: This study quantifies the role of stored entropic energy in polymer structure on scratch closure and self-healing in coatings. The closure of damage is linearly related to entropy release and controlled by two network parameters, junction density and damping factor.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Vincenzo Montano, Wouter Vogel, Angela Smits, Sybrand van der Zwaag, Santiago J. Garcia
Summary: This study investigates the effects of the soft block fraction and H-bond state in thermoplastic polyurethanes on autonomous entropy-driven scratch closure and barrier restoration. It is found that while softer polyurethanes can efficiently close cracks, they are unable to sufficiently restore barrier properties.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Vincenzo Montano, Michele Senardi, Sybrand van der Zwaag, Santiago J. Garcia
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Physical
Vincenzo Montano, Stephen J. Picken, Sybrand van der Zwaag, Santiago J. Garcia
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
Article
Electrochemistry
Paul J. Denissen, Axel M. Homborg, Santiago J. Garcia
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
