Article
Chemistry, Applied
Andrea Cristoforetti, Stefano Rossi, Flavio Deflorian, Michele Fedel
Summary: The mechanism of filiform corrosion on acrylic-coated steel was studied by analyzing the anodic and cathodic branches of potentiodynamic curves in two different electrolytes simulating the liquid environments at the metal-paint interface. Zero resistance amperometry was used to obtain numerical results. A simplified setup was used to estimate the potential difference and current density at the filament tip. The impact of oxygen availability on corrosion mechanisms was investigated by adjusting the amount of dissolved oxygen and the humidostatic chamber used for FFC propagation.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Multidisciplinary
Christos Kousis, Patrick Keil, Neil McMurray Hamilton, Geraint Williams
Summary: In-situ scanning Kelvin probe and time-lapse photography were used to investigate filiform corrosion (FFC) of organic coated magnesium alloys. The propagation rates of FFC were found to increase logarithmically with chloride ion concentration and were strongly influenced by relative humidity. Surface analysis after corrosion revealed chloride abundance near the filament leading edge and evidence of sequestration within corroded regions behind. The FFC mechanism involves chloride-induced anodic dissolution at the front coupling with water reduction on a cathodically-activated corroded surface behind.
Article
Chemistry, Applied
Veronica Veloso, Fernando Cotting, Diego Silva, Adelina Santos
Summary: This study evaluated the performance of epoxy coatings containing polyaniline, graphene, and modified graphene in corrosion protection of carbon steel. The results showed that the modified graphene coating provided excellent corrosion protection with minimal damage to its structure.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Multidisciplinary
Yue Wang, Xin Mu, Zhenye Chen, Zhangguo Lin, Junhua Dong, Enobong Felix Daniel, Jianjun Qi, Wei Ke
Summary: In a simulated coastal-industrial atmosphere, alloyed Cu and P were found to inhibit electrochemical processes and promote the formation of alpha-FeOOH in the initial rust composition of weathering steel, resulting in a lower corrosion rate. The original/processed data supporting these findings are not currently available due to an ongoing study.
Article
Materials Science, Multidisciplinary
Trishelle M. Copeland-Johnson, Charles K. A. Nyamekye, Lynne Ecker, Nicola Bowler, Emily A. Smith, Raul B. Rebak, Simerjeet K. Gill
Summary: In this investigation, multi-modal characterization was used to evaluate the oxidation of Stainless Steel 304 under laboratory air and 100% steam (1200 degrees C, 2 h). Air oxidation resulted in Fe(NiMn)O4, Fe3O4, Fe(3,0CrxO4, and Cr2O3. Steam oxidation produced a dual layer structure, with a porous outer layer enriched in Fe2O3 and a sub-surface matrix of Fe3O4/Fe(3,0CrxO4 with SiO2/Fe(3_ x)SixO4. Based on these findings, an oxidation mechanism was proposed. The arrangement of oxidation products in air aligned with anticipated diffusion behavior, except for Cr2O3. However, the arrangement in steam deviated due to intergranular interactions with H2O, resulting in the formation of the sub-surface matrix.
Article
Materials Science, Multidisciplinary
Yue Wang, Xin Mu, Junhua Dong, Aniefiok Joseph Umoh, Wei Ke
Summary: The corrosion behavior of mild steel in a simulated coastal atmosphere environment was studied through experiments, showing a trend of rapid increase followed by gradual stabilization during the corrosion process. Different chemical compositions and conductivity were observed in the inner and outer layers of the rust as it thickened. The thickening rust layer inhibited the diffusion of aggressive ions, gradually suppressing the electrochemical corrosion process.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Mehrdad Hoseinpoor, Tomas Prosek, Jacky Mallegol
Summary: The tendency of blistering of coil coated steel sheets after deformation was examined in accelerated tests and marine climate. The blistering mechanism in deformed areas was influenced by corrosion processes, and blistering increased with induced strain. The inferior performance in deformed areas was mainly due to the higher permeability of organic coatings caused by the formation of additional defects. Localized water uptake measurements using the parallel plate capacitor technique were successfully employed to quantify the overall damage to protective coatings induced by deformation. A link was discovered between blistering behavior and the relative increase in water uptake.
Article
Chemistry, Applied
Mehrdad Hoseinpoor, Tomas Prosek, Jacky Mallegol
Summary: The corrosion protection ability of paint systems is influenced by the amount of water transported through defects in organic coatings to the metal/paint interface. The blind hole cup method with a free-standing paint film accurately determines this ability, and evaluates the durability of paint systems.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Multidisciplinary
Jiawei Li, Dongzhu Lu, Li Wang, Hao Huang, Haifeng Liu, Quantong Jiang, Yanliang Huang, Baorong Hou
Summary: This study observes the corrosion behavior of aluminum alloy under an organic coating and proposes an effective method to remove the organic coating. The results are valuable for understanding and mitigating metal corrosion under an organic coating.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Coatings & Films
Santigopal Samanta, K. Mondal, Monojit Dutta, Shiv Brat Singh
Summary: This study discusses the effect of different electroless NiP coatings on the resistance to H-permeation and corrosion against chloride attack on API X70 grade steel. The coatings were found to be primarily amorphous with some nano-crystalline areas. Near-eutectic NiP coating displayed higher resistance to corrosion due to the formation of amorphous Fe(OH)(3) and a higher alpha/gamma FeOOH ratio in the rust.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Trishelle M. Copeland-Johnson, Charles K. A. Nyamekye, Lynne Ecker, Nicola Bowler, Emily A. Smith, Raul B. Rebak, Simerjeet K. Gill
Summary: Understanding the oxidation process of Inconel 600 (A600) in different environments is important for the development of accident tolerant nuclear fuel rod claddings. This study combines synchrotron-based diffraction, Raman spectroscopy, and nano-scale electron microscopy techniques to investigate the oxidation of A600 in steam and air environments. It was found that a Cr2O3-enriched surface layer forms in steam, while a mixed phase oxide layer containing NiFe2O4, Cr2O3, Fe3O4, and Fe((3-x))CrxO(4) forms in air.
Article
Materials Science, Multidisciplinary
E. Wierzbicka, B. Vaghefinazari, S. V. Lamaka, M. L. Zheludkevich, M. Mohedano, L. Moreno, P. Visser, A. Rodriguez, J. Velasco, R. Arrabal, E. Matykina
Summary: Flash-PEO coatings, incorporating self-sealing effect and organic corrosion inhibitors, provide a green alternative to chromate conversion coatings with equally effective corrosion protection for industrial level applications.
Article
Chemistry, Physical
Rosa Vera, Margarita Bagnara, Rodrigo Henriquez, Lisa Munoz, Paula Rojas, Andres Diaz-Gomez
Summary: This study evaluated the behavior of three paint systems exposed to the Antarctic marine environment for 45 months compared to a control of uncoated carbon steel. The study assessed the environmental conditions and analyzed the paint systems before and after exposure. The results showed that the best behavior was found for the system whose top layer was acrylic-aliphatic polyurethane.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Stefano Rossi, Flavio Deflorian, Michele Fedel
Summary: Accelerated methods are necessary to test organic coatings in less time, as testing under natural conditions is time-consuming. Investigating the correlation between accelerated and natural aging test results is important due to the inability of a simulated environment to fully reproduce actual operating conditions. This study examines the natural aging of painted steel, aluminum, and hot-dip galvanized steel under continental climate conditions for 1 year. The extent of deterioration is compared with samples weathered through accelerated testing, using various measurement techniques. The results highlight challenges in predicting the durability of organic coatings for metal structures.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Ebrahim Haji Naghi Tehrani, Mohammad Ramezanzadeh, Bahram Ramezanzadeh
Summary: The study constructed a metal-organic film with high anti-corrosion potency on mild steel surface using Malva sylvestris and zinc cations, and analyzed the synergistic inhibition impact and protective film formed through various techniques, demonstrating excellent corrosion resistance.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Jinwook Seong, G. S. Frankel, N. Sridhar
Article
Materials Science, Multidisciplinary
Ju Kang, Zhicao Feng, G. S. Frankel, Jichao Li, Guisheng Zou, Aiping Wu
Article
Materials Science, Multidisciplinary
Zhicao Feng, G. S. Frankel, W. H. Abbott, C. A. Matzdorf
Article
Materials Science, Multidisciplinary
Jinyang Zhu, Lining Xu, Zhicao Feng, G. S. Frankel, Minxu Lu, Wei Chang
Article
Electrochemistry
Zhicao Feng, G. S. Frankel
ELECTROCHIMICA ACTA
(2016)
Article
Electrochemistry
S. Fajardo, C. F. Glover, G. Williams, G. S. Frankel
ELECTROCHIMICA ACTA
(2016)
Article
Chemistry, Physical
Clayton B. Casper, Dominique Verreault, Ellen M. Adams, Wei Hua, Heather C. Allen
JOURNAL OF PHYSICAL CHEMISTRY B
(2016)
Article
Materials Science, Multidisciplinary
Ju Kang, Zhi-Cao Feng, Ji-Chao Li, G. S. Frankel, Guo-Qing Wang, Ai-Ping Wu
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2016)
Article
Materials Science, Multidisciplinary
Ju Kang, Zhi-Cao Feng, G. S. Frankel, I. Wen Huang, Guo-Qing Wang, Ai-Ping Wu
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2016)
Article
Chemistry, Physical
Ellen M. Adams, Dominique Verreault, Thilina Jayarathne, Richard E. Cochran, Elizabeth A. Stone, Heather C. Allen
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Article
Chemistry, Applied
N. W. Khun, G. S. Frankel
PROGRESS IN ORGANIC COATINGS
(2016)
Article
Chemistry, Multidisciplinary
Ting Zhang, Shelby L. Brantley, Dominique Verreault, Raja Dhankani, Steven A. Corcelli, Heather C. Allen
Article
Chemistry, Physical
Lisa Goette, Krista M. Parry, Wei Hua, Dominique Verreault, Heather C. Allen, Douglas J. Tobias
JOURNAL OF PHYSICAL CHEMISTRY A
(2017)
Meeting Abstract
Chemistry, Multidisciplinary
Dominique Verreault, Ellen Adams, Clayton Casper, Heather Allen
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2016)
Meeting Abstract
Chemistry, Multidisciplinary
Heather Allen, Dominique Verreault, Wei Hua, Ellen Adams, Ting Zhang, Bethany Wellen
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2016)