Article
Materials Science, Multidisciplinary
Pratyush Mishra, Denizhan Yavas, Abdullah Alshehri, Pranav Shrotriya, Ashraf Bastawros, R. Kurt Hebert
Summary: The paper presents a model for intergranular corrosion of nonsensitized low-carbon pipeline steels, where enhanced grain boundary oxidation is explained by vacancies produced by reactive Si atoms. Experimental evidence supports the role of vacancy diffusion in the evolution of IGC, with calculations showing agreement with experimental measurements. The rationalization of sharpening of GB grooves over time during corrosion exposures and the quantitative explanation of IGC enhancement by vacancy diffusion without solute segregation or precipitation at GBs are key findings.
Article
Materials Science, Multidisciplinary
Yingjian Huang, Qiuqing Zhu, Zhenju Zhou, Yu Zhou, Hui Cang, Yongming Tang
Summary: The corrosion behaviors of low-alloy steel were studied in simulated tidal zones using various testing methods. The results showed that the corrosion in tidal zones was more severe than in the immersion zone, with the low tide and middle tide zones experiencing more severe corrosion than the high tide zone.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Zhi Chen, Chao Li, Hang Su, Yao Huang, Xianguo Yan
Summary: This paper investigates the effect of deep cryogenic treatment on the corrosion resistance of 42CrMo low alloy steel. The results show that the deep-cooled specimens at -120°C, -160°C, and -190°C exhibit reduced self-corrosion current density compared to conventional heat-treated specimens. The presence of fine carbide precipitation on the samples treated at -120°C improves their corrosion resistance.
Article
Materials Science, Multidisciplinary
Shaohua Zhang, Tiantian Bian, Liming Mou, Xiaoyan Yan, Jinling Zhang, Yuezhong Zhang, Baosheng Liu
Summary: In this work, low-Cr steels with enhanced corrosion resistance by employing Ni and Mo alloying were self-designed to provide an alternative option compared to a common 3Cr steel in CO2 environments. The corrosion resistance mechanism was investigated by comprehensively evaluating corrosion behavior of three low-Cr steels exposed to CO2-saturated NaCl solutions over time periods of 6-168 h at 90 and 180 degrees C, involving electrochemical and immersion tests. The results indicate that the addition of Ni and Mo decreases general corrosion rates only in the early stages of corrosion, and FeCO3 crystals instead of inner Cr-enrichment films play a decisive role in retarding long-term general corrosion rates. On the other hand, localized corrosion behavior of low-Cr steels is obviously retarded by employing Ni and Mo alloying, in which non-reactive nickel occupies a large amount of vacancies and restricts the diffusion of corrosive species. In addition, Mo accelerates the enrichment of Cr during early stages of immersion and facilitates rapid re-passivation once films are broken, reducing the risks of perforation failure of pipelines.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Coatings & Films
Y. B. Bozkurt, H. Kovaci, A. F. Yetim, A. celik
Summary: Many engineering structures, such as biomedical, automotive, and aerospace, experience wear and corrosion damage during service, which shortens their lifespan. Tribocorrosion, the combined effect of wear and corrosion, has a greater impact on the lifetime of these structures than the individual effects. Surface properties play a crucial role in tribocorrosion damage, and various surface modifications, including shot peening, have been used to improve the performance of materials. However, the tribocorrosion behavior of shot peened materials has not been fully understood. Therefore, this study investigated the effect of shot peening on the tribocorrosion properties of AISI 4140 low-alloy steel. The results showed that increasing shot peening intensity changed the surface characteristics from hydrophobic to hydrophilic and improved the tribocorrosion performance in terms of increased surface hardness.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jing Ming, Xiaocheng Zhou, Linhua Jiang, Jinjie Shi
Summary: This study investigated the long-term corrosion behavior of a Cr-bearing low-alloy steel with different surface conditions (as-received, pickled, and pre-rusted) in concrete partially exposed to 3.5 wt% NaCl solution. The improved corrosion resistance of the steel was attributed to the formation of a compact and protective inner rust layer enriched with Cr and Si, which could be further protected by the mill scale.
Article
Construction & Building Technology
Liu Yang, Xiaojia Yang, Feifan Xu, Qing Li, Renzheng Zhu, Xuequn Cheng, Guowei Yang, Xiaogang Li
Summary: This study investigates the formation and properties of rust layers on low alloy steel with 0.40 wt% tin (Sn) in rural atmospheric environments. Various techniques such as scanning electron microscopy, X-ray diffraction, and Raman spectroscopy were used to analyze the rust layer. Additionally, a new corrosion big data sensor was utilized to evaluate the corrosion resistance of Sn-containing low alloy steels.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
J. Li, H. Qiu, X. F. Zhang, H. L. Yu, J. J. Yang, X. H. Tu, W. Li
Summary: A comparative study on the abrasive wear, corrosion, and abrasive-wear corrosion behaviors of low alloy martensitic steel with different (Ti, Mo) C particle contents was conducted. The results showed that increasing carbide content improved the abrasive wear resistance but weakened the abrasive-corrosive resistance due to galvanic corrosion.
Article
Construction & Building Technology
Woongik Hwang, Ki Yong Ann
Summary: This study developed a model to simulate the formation of rust and quantify its structural impact in steel reinforced concrete. Variables such as interfacial gap, cover depth, and steel rebar diameter were considered in the model. The results showed that the interfacial gap had the most significant influence on the structural limitation caused by steel corrosion, followed by steel diameter and cover depth. Under a cover depth of 75mm and a steel diameter of 20mm, the rust amount needed to reach yielding varied from 2.66-11.58μm for an interfacial gap of 1-10μm, while the equivalent rust formation ranged from 16.95-27.69μm.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
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
Materials Science, Multidisciplinary
Xinwei Xu, Yingjian Huang, Qiuqing Zhu, Anran Zuo, Hui Cang, Yongming Tang
Summary: Simulated splash corrosion of Q345D low-alloy steel and conducted in-situ electrochemical measurements. In the early stage of splash corrosion, the corrosion rate in the low splash zone is significantly higher than that in the high splash zone, but the difference in corrosion rate becomes slight in the later stage under different splash amounts. Compared to high splash amount, corrosion under low splash amount is more localized. The density of rust layers in the splash zone increases with time, and the rust layers are mainly composed of Fe3O4/γ-Fe2O3 phase with a small amount of α-FeOOH and γ-FeOOH.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhenguang Liu, Yiming Wang, Yangdong Zhai, Yanxin Qiao, Chuanbo Zheng, Dongpeng Wang, Xingling Shi, Huihu Lu, Chuan Liu
Summary: The corrosion behavior of low alloy steel in H2S-saturated solution was studied through immersion experiment, focusing on corrosion rate, corrosion product morphology, and alloying element distribution. The results showed that the corrosion rate decreased over time, and the corrosion products had a denser and thicker structure. Alloying elements, such as Cr and Mo, tended to accumulate in the corrosion products.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Xin Wei, Junhua Dong, Yupeng Sun, Nan Chen, Qiying Ren, Madhusudan Dhakal, Xiaofang Li, Wei Ke
Summary: This study investigates the impact of deteriorated bentonite sediments on the corrosion behavior of NiCu low alloy steel. The results show that the presence of bentonite sediments can reduce the corrosion rate and localized corrosion tendency of the steel.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Menghao Liu, Cuiwei Du, Ziyan Zhang, Jiawei Ao, Xiaogang Li
Summary: In this study, we investigated the effect of nitrogen on the corrosion behavior of low-alloy high-strength steel in a simulated marine atmosphere using various analytical methods. The results showed that the addition of 0.02 wt.% nitrogen did not significantly improve the average corrosion resistance but slightly decreased the ratio of maximum corrosion depth to average corrosion depth. Nitrogen was found to be present as ammonium ions and enriched at the bottom of corrosion products. Overall, the addition of 0.02 wt.% nitrogen slightly enhanced the polarization resistance and increased the stability of corrosion products, but had no obvious improvement on decreasing the corrosion rate.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Yajing Zhang, Rui Yuan, Jianhua Yang, Daheng Xiao, Deng Luo, Wenhao Zhou, Chende Tuo, Huibin Wu, Gang Niu
Summary: This study assessed the effects of different tempering temperatures on the corrosion resistance of low alloy steel in a wet atmosphere. The results showed that defects and high angle grain boundaries were preferentially corroded. The tempering temperature influenced the distribution of grain boundaries and the corrosion resistance depended on the matrix in the later stage of corrosion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
