Article
Construction & Building Technology
Carmen Andrade
Summary: There is limited data regarding the corrosion rates of reinforcements in marine conditions. In this study, long-term corrosion rates were examined for both small specimens and large reinforced concrete blocks in direct contact with natural seawater. The small specimens had embedded bars at different cover depths, with corrosion rates measured periodically over a span of 10 to 23 years using the polarization resistance method. The large blocks, which had been semi-buried for approximately 25 years in a tidal area of a beach in Spain, had their corrosion rates measured only four times. Surprisingly, the bars showed no signs of corrosion despite high contamination at a cover depth of 3 cm. Additionally, the statistical distribution of corrosion rates in other marine structures is presented.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Engineering, Civil
Xiaoxu Huang, Yingwu Zhou, Xubin Zheng, Youbin Lan, Feng Xing, Lili Sui, Biao Hu, Shan Li
Summary: This paper investigates the flexural performance of a hybrid CFRP/steel reinforced concrete structural system with ICCP. The results show that the proposed system effectively inhibits further steel corrosion and maintains satisfactory structural performance under a protection current density of 10mA/m(2).
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2022)
Article
Materials Science, Multidisciplinary
Molin Su, Siyu Yang, Lianyong Xu, Lei Zhao, Yongdian Han
Summary: This study systematically investigated the corrosion failure behavior of EH36 joints in different environments. The results showed that the seawater environment had a minor effect on the tensile performance but played a critical role in the fatigue behavior. Furthermore, it was found that corrosion pits and cyclic stress significantly decreased the fatigue strength of the joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Construction & Building Technology
Jiyue Hu, Siyu Wang, Yiyan Lu, Shan Li
Summary: The combination of strengthening and corrosion protection using multi-functional material, such as carbon fiber reinforced polymer (CFRP), has been studied in this paper. It was found that a double protection of CFRP wrapping and impressed current cathodic protection (ICCP) was more effective than epoxy coating or sole CFRP wrapping. The optimal ICCP current density depended on the degree of pre-corrosion, and CFRP wrapping provided greater improvements in charge transfer resistance compared to epoxy coating. This work provides a basis for further optimization of ICCP-strengthening technique for corroded reinforced concrete components.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Pei He, Donghua Suo, Wenbo Wu, Liqiang Yin, Wei Dai, Binggang Shang, Yuanyuan Liu, Yangting Sun, Yiming Jiang, Jin Li
Summary: The crevice corrosion behaviors of hydrogen-charged duplex stainless steel 2205 were investigated. It was found that absorbed hydrogen decreases the critical conditions of crevice corrosion and affects its stages. Microstructural analysis revealed that hydrogen-charged specimens exhibited different morphologies compared to uncharged specimens.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Heng Liu, Cunao Feng, Zening Wang, Yi Zhang, Dekun Zhang, Yu Yan
Summary: Fretting crevice corrosion of total hip joints is related to joint replacement failure. In this study, an artificial crevice system that could simulate fretting corrosion in the center of the crevice was designed, and the effects of different crevice widths and crevice corrosion on fretting corrosion were studied.
Article
Materials Science, Multidisciplinary
Bin Luo, Qian Hu, Jing Liu, Feng Huang
Summary: The effect of crevice gap size on the crevice corrosion behavior of 2205 duplex stainless steel in NaCl solution was investigated. The study found that the crevice gap size influences the acidification rate of the crevice solution and the initiation period time of crevice corrosion through volume effect and diffusion effect, with diffusion effect having a more significant impact on the initiation period time. The corrosion development process is mainly determined by the potential and current density distribution within the crevice, and the crevice gap size is the dominant factor for the development mechanism of crevice corrosion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Nisheeth Kr Prasad, A. S. Pathak, S. Kundu, Pankaj Panchal, K. Mondal
Summary: The study investigated the effectiveness of high phosphorus pig iron as a sacrificial anode for cathodic protection of mild steel in concrete. Results showed that pig iron samples exhibited more active potential compared to mild steel in simulated concrete pore solution, with lower polarization resistance as phosphorus content increased.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Construction & Building Technology
Jiyue Hu, Siyu Wang, Yiyan Lu, Shan Li
Summary: This study analyzed the efficiency and mechanism of impressed current cathodic protection for corroded steel reinforcements in concrete using electrochemical noise. The results showed that a current density of 30 mA/m2 led to alleviated corrosion, while 90 mA/m2 may result in overprotection and hydrogen corrosion.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Maria del Rosario Silva Campos, Carsten Blawert, Nico Scharnagl, Michael Stoermer, Mikhail L. Zheludkevich
Summary: In this study, a screening of Al-X alloys was conducted to find environmentally friendly alternatives to replace Cd for corrosion protection of steel. Promising Al-based sacrificial alloys were identified and suitable heat treatments were implemented to improve their corrosion properties. Extensive evaluation in NaCl solution identified the most promising alloys for efficient cathodic protection of steel, avoiding Al passivation.
Article
Electrochemistry
B. Malki, G. Berthome, T. Souier, C. Boissy, I Guillotte, B. Baroux
Summary: This study investigates crevice corrosion of ferritic stainless steels in chloride-containing media using a dual experimental and computational technique. The specially designed set-up monitors current and potential, while a 3D finite element model provides mechanistic interpretation of the results. The asymptotic current and potential at the end of the experiments are found to be more realistic indicators of crevice corrosion kinetics.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Hugo Hartl, Joseph Davies, Geoffrey Will, Kostya Ostrikov, Jennifer MacLeod
Summary: This study presents a new method for directly fabricating a superhydrophobic surface coating on mild steel. Dielectric barrier discharge (DBD) plasma was used to convert a liquid small-molecule precursor to a solid film through plasma-assisted on-surface polymerization. The properties of the coating were analyzed using various techniques, including microscopy, spectroscopy, and contact angle measurement. The results showed that the wettability of the films could be controlled by adjusting the plasma parameters and incorporating graphene nanoplatelets in the precursor. High-dose plasma exposures of the nanoplatelet-containing precursor resulted in the formation of superhydrophobic films with water contact angles above 150 degrees. However, the superhydrophobic coating provided limited corrosion protection according to potentiodynamic polarisation tests.
SCIENTIFIC REPORTS
(2023)
Article
Construction & Building Technology
Deepak K. Kamde, Karthikeyan Manickam, Radhakrishna G. Pillai, George Sergi
Summary: The study demonstrates that alkali-activated galvanic anodes can protect steel rebars from corrosion for at least 12 years in a natural environment. However, analysis after 12 years revealed that pores in encapsulating mortar were partially filled with zinc corrosion products, resulting in substantial pore blockage and a reduction in the pH buffer surrounding the zinc metal. These findings suggest that characteristics of the tie wire-zinc metal interface may impact the long-term performance of galvanic anodes. Specifications proposed in the study aim to assist manufacturers in designing durable galvanic anode systems.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
J. Mu, Y. Z. Li, X. Wang
Summary: The crevice corrosion of X70 steel varies in different pH solutions, with pH=2 and pH=12 solutions promoting crevice corrosion while pH=6.8 solution prevents it. The increase of pH and Cl- inside crevice contribute to crevice corrosion in pH=2 solution, while the decrease of pH and increase of Cl- inside crevice lead to crevice corrosion in pH=12 solution.
Article
Materials Science, Multidisciplinary
Lei Yan, Guang-Ling Song, Pengpeng Wu, Yixing Zhu, Dajiang Zheng
Summary: The research showed that increasing the aluminum content in Mg alloys can enhance concrete corrosion performance, but excessive alloying of aluminium can lead to over-protection of steel.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Zhichao Shang, Xiaoping Cai, Farshid Pahlevani, Yan Zheng, Akbar Hojjati-Najafabadi, Xinran Gao, Baojing Zhang, Peizhong Feng
Summary: High porosity Co-Al-Fe intermetallics with 3D-microstructures were successfully synthesized in one step via a thermal explosion reaction. The link between pore structure and permeability was investigated using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was studied at 900 degrees C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the samples maintained stable pore structure and intact internal matrices, attributed to the formation of a thin protective layer on the surface. In addition, inward diffusion of S resulted in the formation of FeS nodules.
Article
Materials Science, Multidisciplinary
Lian Ma, Hain Yang, Daquan Zhang, Wei Wu
Summary: In this study, an environmentally friendly volatile corrosion inhibitor, lysine salts (LA), was prepared between graphene oxide (GO) layers using an in situ intercalation technique. The corrosion inhibition effect of LA was evaluated, and it was found that LA-GO2 achieved a 99.3% corrosion inhibition efficiency after composition optimization. The inhibition of the electrochemical anodic process on the surface of mild steel was the main reason for the high corrosion inhibition efficiency of LA-GO2. The properties of the surface film on the corroded steel were also characterized in detail to understand the corrosion inhibition mechanism of LA-GO2.
Article
Materials Science, Multidisciplinary
Running Wang, Jiaping Zhang, Bing Liu, Jie Fei, Qiangang Fu
Summary: By introducing a tailored SiC-C interphase, the carbon fiber can be effectively protected, improving the mechanical and ablation properties of leading edge shaped C/C-ZrC-SiC composites.
Article
Materials Science, Multidisciplinary
Zihua Wang, Chijia Wang, Ruitao Wang, Jiapeng Deng, Kun Zhang, Yanji Zhu, Huaiyuan Wang
Summary: A robust anti-corrosive coating has been developed using functional fly ash, which demonstrates excellent corrosion resistance and improved mechanical properties. The coating achieves these enhancements through molecular cross-linking design and surface augmentation techniques, resulting in a significantly improved impedance modulus compared to pure polyurea coatings.
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
Article
Materials Science, Multidisciplinary
Yang Li, Ke Ma, Jingjun Xu, Jingjing Li, Yueming Li, Yi Zhang, Jun Zuo, Meishuan Li
Summary: Cr2AlC diffusion barrier effectively blocks the diffusion of Ti, enhancing the stability and spalling resistance of the Al2O3 scales between NiCrAlY coating and TiAl alloy.
Article
Materials Science, Multidisciplinary
Weiyi Wang, Qinglin Pan, Xiangdong Wang, Bing Liu
Summary: By adding Ce, Sc, Y and Zr elements to Al-Mg-Si alloy, the microstructure of the alloy can be regulated, and the corrosion and heat resistance of the materials can be improved.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Javier Izquierdo, Ricardo M. Souto, Flavio Deflorian, Michele Fedel, Stefano Rossi
Summary: This study presents a new approach to studying the mechanism of filiform corrosion in organic coated steel using the scanning vibrating electrode technique (SVET) and micropotentiometry (potentiometric SECM). The electrochemical activity under the coating was evaluated by mapping the ionic current densities coming from artificial defects made in specific locations of the filament. Antimony tips were also used to investigate the pH changes associated with different corrosion reactions at the metal-paint interface. Local pH levels along the filament in the anodic and cathodic regions were determined.
Article
Materials Science, Multidisciplinary
Yang Gao, Dayun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
Summary: The corrosion characteristics of a novel alumina-forming austenitic steel in high-pressure high-temperature water environment were studied. The addition of aluminum has a negative effect on the continuity of the alumina scale.
Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Peter Visser, Zahra Jiryaeisharahi, Kristof Marcoen, Shoshan T. Abrahami, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This work explores the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in organic coatings. An odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach is used to analyze the diffusion of ions independent from water uptake. The results show that a higher PVC leads to a more homogeneous coating structure, resulting in faster diffusion of ions and enhanced water uptake.
Article
Materials Science, Multidisciplinary
Eloa Lopes Maia, Serguei Gavrilov, Valentyn Tsisar, Kitty Baert, Iris De Graeve
Summary: The effect of pre-oxidation in air at 300-500°C on the initiation and development of liquid metal corrosion attack on 316L austenitic steel in static lead-bismuth eutectic (LBE) has been investigated. It was found that pre-formed oxide films can protect the surface against dissolution, while high temperature pre-oxidation leads to localized corrosion.
Article
Materials Science, Multidisciplinary
Baozhuang Sun, Qiuyu Wang, Yue Pan, Zhiyong Liu, Cuiwei Du, Xiaogang Li
Summary: In this study, a non-steady electrochemical model was established to investigate stress corrosion cracking (SCC). The model was verified using 304 SS with various microstructures, confirming its effectiveness in assessing SCC susceptibility.
Article
Materials Science, Multidisciplinary
Xingyu Xiao, Xinhua Liu, Zhilei Wang, Xuexu Xu, Mingying Chen, Jianxin Xie
Summary: The corrosion behavior and mechanisms of Cu-10Ni-X (Al, Fe, Mn, Cr, Sn, Ti, Zn) alloys in a 3.5% NaCl solution were systematically investigated. Both computational and experimental results revealed that except Ti, other elements could enhance the corrosion resistance of Cu2O passivation film.
Article
Materials Science, Multidisciplinary
Gen Zhang, Yan-Ping Huang, E. Jiang, Wei -Wei Liu, Hong Yang, Jing Xiong, Yong-Fu Zhao
Summary: The addition of aluminum has a significant influence on the intermetallic compounds in AFA alloys, particularly increasing the content of B2-NiAl phase. In the SCO2 environment, the oxide scales formed on AFA alloys with aluminum were thinner than on ASS without aluminum, and the structure of the oxide scales changed to a double-layer structure.
Article
Materials Science, Multidisciplinary
Yuxuan He, Guozheng Xiao, Chao Wang, Xuefeng Lu, Liuyuan Li, Shiying Liu, Yusheng Wu, Zhanjie Wang
Summary: The relationship between configurational entropy and lattice distortion in novel rare earth monosilicates was investigated, and the effect of configurational entropy on their properties was studied. The results showed that lattice distortion increased with the increase of configurational entropy, but a highly symmetrical crystal structure was formed when the configurational entropy was large enough, inhibiting the lattice distortion.