Article
Materials Science, Multidisciplinary
Heon-Young Ha, Kyeong-Won Kim, Seong-Jun Park, Chang-Hoon Lee, Tae-Ho Lee, Hyun-Uk Hong, Joonoh Moon
Summary: Fe-20Mn-11.5Al-1.4C-5Cr lightweight stainless steel (LWSS) has equivalent or better resistance to pitting corrosion compared to Fe-11Cr stainless steel (SS), which can be attributed to its protective passive film with higher Cr and Al content, thicker thickness, and lower concentration of point defects.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Kaige Wu, Jae-Yeon Kim
Summary: This study proposed a strategy to control the evolution of open morphology pitting corrosion in 304 stainless steel specimens, monitored the corrosion process through acoustic emission signals, and discussed the sources of acoustic emissions associated with the open morphology of pitting corrosion.
Article
Materials Science, Multidisciplinary
Jing Wu, Meng Li, Yang Zhou, Chuanchuan Lin, Jixi Zhang, Kaiyong Cai
Summary: Corrosion is a major reason for the failure of metallic implants. The presence of bone marrow derived mesenchymal stem cells (BMSCs) can decrease the stability of 316 L stainless steels (316 L SS), leading to preferential pitting corrosion initiation at the peripheries of BMSCs.
Article
Materials Science, Multidisciplinary
Leonardo Bertolucci Coelho, Daniel Torres, Miguel Bernal, Gian Marco Paldino, Gianluca Bontempi, Jon Ustarroz
Summary: This study proposes the use of Scanning Electrochemical Cell Microscopy (SECCM) to collect corrosion activity from random locations on 316 L SS. Pitting corrosion was triggered by potentiodynamic polarization tests in the presence of chloride. Data science methods were employed to analyze 955 j Vs E curves and understand the conditional log(j) distributions at different potentials. The study found that the log(j) distribution was potential-dependent and became more random with increasing testing aggressiveness.
Article
Materials Science, Multidisciplinary
Heon-Young Ha, Kyeong-Won Kim, Seong-Jun Park, Tae-Ho Lee, Hyungkwon Park, Joonoh Moon, Hyun-Uk Hong, Chang-Hoon Lee
Summary: The effects of Cr on the microstructure, pitting corrosion resistance, and passive film properties of lightweight steel were investigated. The optimal Cr content for a homogeneous microstructure was found to be 5 wt%, which resulted in a (Cr,Al)-enriched passive film and improved resistance to pitting corrosion.
Article
Materials Science, Multidisciplinary
Yunlong Wu, Jing Nong, Sui Yuan, Qi Guo, Jian Xu
Summary: This study investigated the acoustic emission behavior of a single pit evolution on two types of stainless steels using small-scaled electrodes, finding that there were dozens of AE signals observed during pitting on 17-4 PH, but much less acoustically emissive on 304 SS. In-situ optical observation revealed black flocculent clusters in 17-4 PH during pitting, while this process was weak in 304 SS. It was concluded that the formation of hydrogen bubble inside the pit and the perturbation of electrolyte around the pit created AE signals.
Article
Materials Science, Multidisciplinary
Yang Zhao, Yong Hua, Bin Liu, Xuanpeng Li, Junfeng Xie, Guanxin Zeng, Tao Zhang, Fuhui Wang
Summary: A multi-degree of freedom mechanistic-chemometrics model has been developed to accurately predict the pitting damage of HP-13Cr stainless steel by combining mechanistic models and chemometrics methods, considering single factors and their interactions through weight coefficients. The accuracy and reliability of the model are validated by six-year-served field data.
Article
Materials Science, Multidisciplinary
Guangming Yang, Yafei Du, Siyao Chen, Yongsheng Ren
Summary: The effects of microstructural evolution on the semiconducting properties and pitting behavior of 304 stainless steel were investigated using electrochemical measurement. It was found that grain coarsening reduced the corrosion resistance of 304 SS in coal chemical high salty wastewater due to the increased formation of defects in the passive film caused by a larger fraction of high-angle grain boundaries. The higher donor density on the specimen's surface also led to a deterioration of passive film stability. Additionally, grain coarsening resulted in an increase in the lifetime, growth rate, and peak current of metastable pits, as well as a gradual increase in the width-depth ratio of stable pits and changes in their shape.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Takahito Aoyama, Hiroaki Ogawa, Chiaki Kato, Fumiyoshi Ueno
Summary: The study found that Cu2+ in solution can affect the pitting corrosion resistance of stainless steel, leading to pitting in solutions containing CuCl2, but not in those without it. Additionally, Cu2+ deposits on the surface in the solution, affecting the formation of passive films.
Article
Chemistry, Physical
Xuefei Wang, Hong Luo, Qiancheng Zhao, Hongxu Cheng, Quande Li, Zhimin Pan, Ya Wei, Yicong Ma, Xiaogang Li
Summary: The passive and pitting behaviors of 17-4 PH martensitic stainless steel containing Al2O3 inclusions in a chlorine environment were studied. The electrochemical behavior was evaluated using various techniques in NaCl solutions of different concentrations. The results showed a decrease in pitting corrosion resistance with increasing NaCl concentration. Pits were observed to initiate around the Al2O3 inclusions. XPS analysis revealed a change in the constitution of the passive films, with increased hydroxides and decreased oxides contributing to lower resistance to pitting corrosion. The stability of the passive film was found to be influenced by the content of CrO3, bound water, and the Cr/Fe ratios.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Sherief A. Al Kiey, E. A. Abd El Meguid, S. S. Abd El Rehim
Summary: The pitting corrosion susceptibility of 904L stainless steel in aerated LiBr solutions was studied using electrochemical measurements. The experimental variables, including electrolyte concentrations, pH, scan rate, temperature, and constant potential, were investigated. The results showed that the uniform corrosion rate and pitting corrosion susceptibility increased with increasing LiBr concentrations and temperature. Increasing the pH of the solution decreased both corrosion rates. An increase in scan rate enhanced uniform corrosion but suppressed pitting corrosion. EIS diagrams displayed a depressed semicircles with the center under the real axis. Bode plots supported the result that the uniform corrosion resistance decreased with increasing Br- anion concentration in LiBr solutions. The observations suggested that the observed single time constant may actually be the overlap of two time constants.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
R. Silva, C. L. Kugelmeier, G. S. Vacchi, C. B. Martins Junior, I Dainezi, C. R. M. Afonso, A. A. Mendes Filho, C. A. D. Rovere
Summary: The study found that Cr carbide and nitride precipitation occur in LDSS 2404 at 475 degrees C, but the main cause of Cr depletion and loss of pitting resistance is spinodal decomposition.
Article
Materials Science, Coatings & Films
Changyu Wang, Hairong Bian, Kaiyu Luo, Igor V. Alexandrov, Youyu Su, Qunli Zhang, Xingyu Bu, Jinzhong Lu
Summary: The influences of laser shock peening (LSP) with different coverage layers on the electrochemical and long-term immersion corrosion behaviors of 2Cr12NiMoWV martensitic stainless steel in 3.5 wt% NaCl solution were studied. LSP-induced corrosion resistant surface resulted in significant diminution of corrosion density and passive current density, as well as higher pitting potential. LSP-generated carbide decomposition, matrix nanocrystallization and surface segregation of Cr contributed to the generation of Cr-rich passive film with better corrosion resistance. Due to the inhibitory effect of matrix nanocrystallization and compressive residual stress on corrosion propagation, LSP greatly reduced the size and number of the corrosion pits even after 30 days' immersion in NaCl solution.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Heon-Young Ha, Jun-Yun Kang, Tae-Ho Lee, Hyungkwon Park, Hoyoung Kim
Summary: The effects of grain refinement on the resistance to pitting corrosion and passive film properties of lean duplex stainless steel have been studied. The results show that grain size reduction enhances the resistance to pitting corrosion and it is attributed to the formation of a thick and dense passive film with a high Cr content.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Mariko Kadowaki, Izumi Muto, Yu Sugawara, Nobuyoshi Hara
Summary: The research shows that the retained austenite in Fe-0.39C-1.51Si-2.01Mn steel has high dissolution resistance in NaCl-containing boric-borate buffers, acting as a barrier against pit propagation during pitting corrosion.
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.