Article
Chemistry, Physical
Mandlenkosi G. R. Mahlobo, Peter A. Olubambi, Phumlani Mjwana, Marc Jeannin, Philippe Refait
Summary: The research found that under correct cathodic protection, the corrosion rate of steel significantly decreased, with the formation of a magnetite layer enhancing the protective effect. However, under overprotection conditions, the efficacy of the protective layer decreased over time, possibly due to the significant water reduction reaction.
Article
Construction & Building Technology
Marco Ormellese, Silvia Beretta, Fabio Brugnetti, Andrea Brenna
Summary: This study investigates the effects of DC interference on carbon steel in cathodic protection in a soil-simulating environment with varying peak current density and duration.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Zhong Li, Baozhuang Sun, Qi Liu, Yifan Yu, Zhiyong Liu
Summary: The study found that square wave polarization (SWP) with alternative stages of pulse current and stable current period plays different roles in stress corrosion cracking (SCC) of pipeline steels. The former mainly contributes to the local anodic dissolution process, while the latter strengthens the cathodic hydrogen evolution process.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Multidisciplinary Sciences
Karina Vilela Rodrigues, Luiz Antonio Lima, Michael Silveira Thebaldi
Summary: Corrosion is a major cause of deterioration in metallic pipes used in irrigation, such as galvanized steel. The study found that using sacrificial anodes for cathodic protection can reduce the mass loss caused by potassium chloride solutions in galvanized steel, but may not be effective in protecting urea-containing solutions. Aluminum anodes are the most suitable for use in high electrical conductivity solutions.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Raheem A. H. Al-Uqaily, Subhi A. H. Al-Bayaty, Anees A. Khadom, Mustafa M. Kadhim
Summary: The current study examined the inhibition performance of 4-Methoxyphenethylamine (MPTA) in 1 M HCl solution. Experimental investigations and theoretical and mathematical attempts were made to understand the relationship between chemical characteristics and inhibitor efficacy. Results showed that MPTA effectively suppressed the corrosion processes of low-carbon steel in acidic solution by adsorption on the metal surface, following a Langmuir adsorption isotherm. Theoretical analysis revealed that the inhibitory capabilities of MPTA were linked to the charge on the nitrogen atom and the net charges of the atoms in the cyclic ring.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Lu Shen, Wenjie Zhao, Lijing Miao
Summary: The study successfully combined the advantages of zinc-rich epoxy coating and graphene-based coating by fabricating bilayered coatings with superior corrosion protection. The method of better dispersing graphene oxide in waterborne coatings provides a new pathway for improving coating performance.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Amine Kherfi, Ahmed Madani, Djazia Chalal, Sofiane Benidir
Summary: This study reports on the use of SHMP surfactant to disperse ZnO nanoparticles in the PPy polymer matrix for the production of a composite PPy-ZnO coating, which exhibited higher corrosion resistance and better barrier properties compared to pure PPy and PPy-ZnO coatings.
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
Chemistry, Analytical
Yanan Sun, Xiutong Wang, Fanglin Du, Jianmin Niu, Youbo Nan, Jiayan Pu, Yanliang Huang, Baorong Hou
Summary: This study investigates the effect of SiO2-coated MnFe2O4 nanoparticles on the photoelectrochemistry of TiO2. The results show that the doped composite films improve the separation rate of photogenerated electrons and holes, widen the absorption range of visible light, and provide protection for 304SS under intermittent illumination.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(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
Chemistry, Physical
Abdoullah Bimoussa, Yassine Koumya, Ali Oubella, Yassine Kaddouri, Mourad Fawzi, Yassine Laamari, Abdesselam Abouelfida, My Youssef Ait Itto, Rachid Touzani, Abdelaziz Benyaich, Aziz Auhmani
Summary: In this study, thiosemicarbazone and semicarbazone sesquiterpene compounds were synthesized and characterized for their anticorrosion behavior and electrochemical activity. The results showed that these compounds acted as effective inhibitors for the corrosion of stainless steel in sulfuric acid medium, with cathodic inhibition as the dominant mechanism. The electrochemical and theoretical studies supported the strong adsorption of the molecules on the stainless steel surface and the reactivity of nitrogen sites in the metal/inhibitor interaction.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Inorganic & Nuclear
Haizhong Tang, Zuwei Song, Jing Wang, Bei Qian
Summary: In this study, a nonmetal ternary photocatalyst consisting of graphitic carbon nitride, reduced graphene oxide, and polypyrrole was reported. The ternary photocatalyst demonstrated superior photocathodic protection performance compared to the pristine and binary photocatalysts. These findings are of significant importance for the advancement of photocathodic protection employing nonmetal photocatalyst materials.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
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
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
Chemistry, Analytical
Yongjian Zhang, Boqing Cai, Xu Wang, Ruixiang Wang, Zhongning Shi
Summary: The electrochemical behavior of Yb3+ ions was investigated in a (LiF-YbF3)eut-Yb2O3 molten salt system, and it was found that Yb3+ ions undergo two quasi-reversible processes on W and Ni cathodes. The addition of Yb2O3 improves the electrochemical activity of Yb3+. The crystallization of Yb3+ ions occurs through three-dimensional instantaneous and continuous nucleation on W and Ni electrodes, respectively. The reduction activity of Yb2+ ions on the Ni cathode is stronger, which enables the preparation of the Ni2Yb alloy.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
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.