Corrosion最新文献_第6页

Electrochemical Study on Corrosion Damage of 7B04 Aluminum Alloy/Anodic Film/Epoxy Coating System in Simulated Marine Atmospheric Environment 模拟海洋大气环境中7B04铝合金/阳极膜/环氧涂层体系腐蚀损伤的电化学研究

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-12 DOI: 10.5006/4380

H. Ji, Xiaobing Ma, Yikun Cai, Han Wang

{"title":"Electrochemical Study on Corrosion Damage of 7B04 Aluminum Alloy/Anodic Film/Epoxy Coating System in Simulated Marine Atmospheric Environment","authors":"H. Ji, Xiaobing Ma, Yikun Cai, Han Wang","doi":"10.5006/4380","DOIUrl":"https://doi.org/10.5006/4380","url":null,"abstract":"This paper investigates the electrochemical characteristics of the 7B04 aluminum alloy/anodic film/epoxy coating system in a simulated marine atmosphere using electrochemical techniques and surface morphology measurements. The coating system underwent a periodic immersion test for 480 hours to simulate the harsh service conditions in a marine environment. Three equivalent circuit models were proposed based on the analysis of the electrochemical failure mechanism of the coating system. AIC (Akaike Information Criterion) and BIC (Bayesian Information Criterion) were used to selectively choose models for different degradation stages of the coating system, revealing its electrochemical degradation characteristics. Two-stage aging kinetics and Gamma models were proposed to describe the time-varying processes of electrochemical low-frequency impedance and corrosion trend, respectively. Ultimately, low-frequency impedance is identified as the most effective and rapid evaluation index for coating performance due to its strong correlation with corrosion trends. The aforementioned models and index provide a foundation for accurately identifying corrosion stages and effectively predicting the corrosion process.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43239365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of H2S on CO2 Corrosion of Mild Steel in High Temperature Supercritical CO2 Condition 高温超临界CO2条件下H2S对低碳钢CO2腐蚀的影响

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-12 DOI: 10.5006/4355

Yoon-Seok Choi, F. Farelas, L. Paolinelli, S. Nešić, A. Z. Abas, A. Nor, M. Suhor

引用次数: 0

Atmospheric Corrosion of Steel Infrastructure in Canada under Climate Change 气候变化下加拿大钢铁基础设施大气腐蚀研究

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-12 DOI: 10.5006/4296

Istemi F. Ozkan, N. Ebrahimi, Jieying Zhang, Dario Markovinovic, H. Shirkhani

{"title":"Atmospheric Corrosion of Steel Infrastructure in Canada under Climate Change","authors":"Istemi F. Ozkan, N. Ebrahimi, Jieying Zhang, Dario Markovinovic, H. Shirkhani","doi":"10.5006/4296","DOIUrl":"https://doi.org/10.5006/4296","url":null,"abstract":"Protection against atmospheric corrosion of steel infrastructure and its components requires assessment and prediction of corrosion rates using quantitative and reliable modelling of the environmental parameters that impact the corrosion process. This has become even more critical in the context of climate change. This study demonstrates the feasibility of using ISO Dose-response Functions (DRFs) to classify atmospheric corrosivity in Canada to improve the current qualitative approach to the corrosion design of carbon steel infrastructure, especially bridges. The DRF predictions for first-year corrosion rates were first confirmed using a set of historical field data collected from different locations across Canada. Further examination has revealed a dramatic change in atmospheric corrosivity at many locations in Canada since the last systematic effort in field data collection in the 1950-60s. it is believed that this was caused by significant drop in in sulfur dioxide levels in the atmosphere. A projection of future corrosivity in various Canadian cities with differing climates was also presented by considering the projected impacts of climate change on the temperature and relative humidity. This study has shown a promising precursor for the development of a corrosivity map in Canada to better guide the corrosion design and protection of steel infrastructure. Furthermore, this study has demonstrated an acute need to understand the current chloride deposition conditions of steel bridges, including the increased local exposure of roadways to corrosivity by the use of de-icing salts.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47011168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High potential inhibition of the 17-4 PH stainless steel in the presence of Nitrate and evolution of metastable pitting 17-4PH不锈钢在硝酸盐存在下的高电位抑制和亚稳点蚀的演变

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-11 DOI: 10.5006/4281

Seyedeh Sajedeh Mousavi, M. Seyedi, M. Moayed, M. Mirjalili, I. Taji, Seyed Hossein Hosseini Mortazavi

{"title":"High potential inhibition of the 17-4 PH stainless steel in the presence of Nitrate and evolution of metastable pitting","authors":"Seyedeh Sajedeh Mousavi, M. Seyedi, M. Moayed, M. Mirjalili, I. Taji, Seyed Hossein Hosseini Mortazavi","doi":"10.5006/4281","DOIUrl":"https://doi.org/10.5006/4281","url":null,"abstract":"In the present investigation, the potential effect of Nitrate ions' inhibition on pitting corrosion of 17-4 precipitation hardening stainless steel in different Chloride and Nitrate concentrations was investigated using potentiostatic and potentiodynamic examinations. Furthermore, metastable pitting was examined in depth to clarify Nitrate inhibition. The results demonstrate that adding Nitrate as an inhibitor to the Chloride containing solution decreases the metastable pit peak current, stability products, and pit radius. In contrast, no significant difference between metastable pit lifetime was observed in the presence and absence of Nitrate in the Chloride solution. It was also shown that introducing 17-4PH stainless steel to the high potential resulted in the repassivation of the surface, even if the Nitrate/Chloride concentration ratio was less than the critical value needed for Nitrate inhibition. Overall, Nitrate ions have an inhibition effect in the Chloride solution. Especially at very high potential, whether the Nitrate concentration was less than the critical value or not, Nitrate forces the surface to get repassivated.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44199681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of environmentally induced crack initiation in humid air in new generation Al-Zn-Mg-Cu alloys 新一代Al-Zn-Mg-Cu合金湿空气环境致裂纹萌生机理

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-10 DOI: 10.5006/4336

T. Burnett, R. Euesden, C. Grant, M. Curd, A. Garner, Y. Aboura, Yichao Yao, Z. Barrett, C. Engel, N. Holroyd, P. Prangnell

{"title":"Mechanisms of environmentally induced crack initiation in humid air in new generation Al-Zn-Mg-Cu alloys","authors":"T. Burnett, R. Euesden, C. Grant, M. Curd, A. Garner, Y. Aboura, Yichao Yao, Z. Barrett, C. Engel, N. Holroyd, P. Prangnell","doi":"10.5006/4336","DOIUrl":"https://doi.org/10.5006/4336","url":null,"abstract":"Recent experience has shown that new-generation 7xxx-series alloys, that have a high Zn content and Zn/Mg ratios, have a greater susceptibility to Hydrogen-Environmental Induced Cracking (H-EIC) on exposure to humid air than more established materials, like AA7050. In this study we report new evidence of the EIC initiation and crack growth behaviour of two new generation alloys, AA7085 and AA7449, when exposed to 50% humidity. In-situ, time lapse, optical imaging over large areas has enabled the exact initiation sites to be identified and investigated with high-resolution fractographic studies, providing evidence for the sequence and mechanisms of initiation and transition to sustained cracking. A consistent behaviour was observed for both alloys. This has revealed that only minute-scale corrosion reactions, involving highly localised condensed water, are necessary for initiation. The preferred initiation sites are metal ligaments between surface-connected pore-clusters and/or intermetallic particles that are subjected to high stress concentration and undergo mechanical damage with associated higher levels of local oxidation. The growth of short proto-cracks from these sites is a distinct stage and displays intermittent arrest markings evidenced by localised corrosion. In contrast, in humid air environments, long cracks in these alloys exhibited relatively constant, higher velocity, with extremely limited corrosion commensurate with oxidation of a free surface in this environment resulting in ~5 nm oxide layer.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":"94 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41299101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of crack-initiating feature on the environment-assisted cracking behavior of sensitized AA5456-H116 in marine environments 裂纹萌生特征对敏化AA5456-H116在海洋环境中环境辅助开裂行为的影响

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-10 DOI: 10.5006/4260

Z. Harris, Lara Ojha, J. Srinivasan, R. Kelly, J. Burns

{"title":"The effect of crack-initiating feature on the environment-assisted cracking behavior of sensitized AA5456-H116 in marine environments","authors":"Z. Harris, Lara Ojha, J. Srinivasan, R. Kelly, J. Burns","doi":"10.5006/4260","DOIUrl":"https://doi.org/10.5006/4260","url":null,"abstract":"The influence of crack-initiating feature on the environment-assisted cracking (EAC) behavior of sensitized AA5456-H116 exposed to marine environments is assessed via fracture mechanics-based testing. Specimens that contained either a traditional fatigue precrack or purposefully introduced intergranular corrosion fissures were immersed in 0.6 M NaCl and polarized to select electrochemical potentials while held at a constant force. The measured crack length versus time relationships from these experiments reveal that the two specimen geometries yield similar crack growth rates at -900 mVSCE and after the onset of accelerated crack propagation at -800 mVSCE. However, precorroded specimens exhibit significantly shorter times to failure than the precracked specimens at -800 mVSCE due to increased crack growth rates at the start of the experiment. The mechanical, environmental, and material factors that could contribute to the initially increased EAC susceptibility of the precorroded specimens are identified using a generalized model for EAC. Analysis of these possible causal factors suggests that the increased susceptibility is due to a residual, initially more deleterious crack chemistry at the occluded corrosion fissure tip from the aggressive galvanostatic polarizations used to accelerate fissure growth. The implications of these results on the efficacy of traditional fracture mechanics-based methods for quantifying EAC susceptibility are discussed.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47267998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crevice Corrosion of High-Grade Stainless Steels in Seawater: A Comparison Between Temperate and Tropical Locations 高档不锈钢在海水中的缝隙腐蚀:温带和热带地区的比较

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-10 DOI: 10.5006/4370

N. Larché, C. Leballeur, E. Diler, D. Thierry

{"title":"Crevice Corrosion of High-Grade Stainless Steels in Seawater: A Comparison Between Temperate and Tropical Locations","authors":"N. Larché, C. Leballeur, E. Diler, D. Thierry","doi":"10.5006/4370","DOIUrl":"https://doi.org/10.5006/4370","url":null,"abstract":"The corrosion risk for stainless steel components is not the same in all seawaters, with more failures generally reported in tropical seas. In this study, the influence of biofilm on electrochemical behavior and corrosion resistance of passive films of high-grade alloys was studied in different seawaters, including temperate seawater (France-Brest, North Atlantic Ocean), tropical seawater (Malaysia-Kelatan, Meridional China Sea), and intermediate conditions in terms of temperature (Brazil-Arraial do Cabo, South Atlantic Ocean). The stabilized open-circuit potentials and the polarization behavior of high-grade stainless steels were measured as function of temperature in all the tested field marine stations, providing quantified data and direct comparison on the biofilm-enhanced corrosion risks. Significant differences were measured in tropical and in temperate seawaters in heated conditions above 30°C. In parallel to the monitoring of biofilm-induced depolarization, crevice corrosion of 8 high grades passive alloys was studied with the use of crevice formers specifically developed for tube geometries. Duplex, super-duplex, hyper-duplex and 6Mo stainless steels tubes have been evaluated together with Ni-based alloys. The corrosion results are discussed regarding the monitored biofilm-induced depolarization measured in the different test conditions.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42040769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environment-Induced Crack Initiation in Aluminum Alloys – Experimental studies since the 1950’s and future opportunities 环境致铝合金裂纹萌生——1950年代以来的实验研究及未来机遇

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-07 DOI: 10.5006/4320

N. Holroyd, T. Burnett, J. Lewandowski, G. Scamans

引用次数: 0

Special Issue on Corrosion of Reinforced Concrete Structures (in Memoriam of Prof. Jose Antonio Gonzalez), Part II 钢筋混凝土结构腐蚀特刊（纪念Jose Antonio Gonzalez教授），第二部分

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-07-01 DOI: 10.5006/4394

D. Bastidas, N. Birbilis

引用次数: 0

Pitting corrosion of mild steel in long-term contact with particulate media in seawater 低碳钢在海水中长期接触颗粒介质时的点蚀

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-06-28 DOI: 10.5006/4322

R. Petersen, R. Melchers

{"title":"Pitting corrosion of mild steel in long-term contact with particulate media in seawater","authors":"R. Petersen, R. Melchers","doi":"10.5006/4322","DOIUrl":"https://doi.org/10.5006/4322","url":null,"abstract":"Steel infrastructure in contact with particulate media is at risk of failure due to pitting corrosion. For reliability analysis it is important to understand the progression of pit depth with time and the associated extreme value statistics. An analysis was conducted on an extensive data set of pit depth observations, made on mild steel coupons buried in different particulate media and immersed in natural Pacific Ocean seawater. It showed that the trends for the deepest pits with time were consistent with the bimodal model, and that pitting was deepest under seawater and increased with particle size when under particulate media. Gumbel plots of the data showed that the deepest pits plotted as a straight line, indicating a good fit. The plots also showed small, regular deviations from this straight-line, and these permitted interpretations for pit depths developing in incremental steps. These step sizes were largest for surfaces under seawater and increased with increasing particle size under particulate media. These findings allowed for new conceptual models for the process of pit depth growth under rust and particulate media. They also allow for new insights into metastable pitting for steels. Opportunities for further research are also presented.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43854668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0