IF 1.6 4区材料科学

Corrosion Pub Date : 2024-01-09 DOI: 10.5006/4435

引用次数: 0

Short- to medium-term corrosion of mild steel in highly calcareous seawaters: effects of calcium carbonate concentration, coupon orientation and nutrient addition 高钙质海水中低碳钢的中短期腐蚀：碳酸钙浓度、试样取向和营养物添加的影响

IF 1.6 4区材料科学

Corrosion Pub Date : 2024-01-09 DOI: 10.5006/4453

Peter J. Richardson, R. Melchers

{"title":"Short- to medium-term corrosion of mild steel in highly calcareous seawaters: effects of calcium carbonate concentration, coupon orientation and nutrient addition","authors":"Peter J. Richardson, R. Melchers","doi":"10.5006/4453","DOIUrl":"https://doi.org/10.5006/4453","url":null,"abstract":"\u0000 Mild steels exposed to marine immersion conditions in which carbonate solubilities are exceeded, leading to deposition of calcareous material, have been shown to exhibit much reduced corrosion rates compared with corrosion under conditions in which there is no exceedance of solubility limits and therefore no calcareous deposition. However, the differences in corrosion including the potential effect of MIC in these conditions have not been examined systematically in the literature. The study reported herein involves short- to medium-term marine immersion exposures (up to 18 months) of mild steel coupons in natural seawater (control) and in environments using the same seawater source dosed with: 1) CaCO3, acting as an inorganic particulate suspension representative of that encountered in seawater with elevated calcareous content, and 2) a nitrate salt, acting as an industrial pollutant and bacterial nutrient source. The results show the extent to which the deposition of particulate CaCO3 from suspension in seawater onto and into the rusts reduces the rate of corrosion of mild steel; a rate that was found to be dependent on the coupon orientation within the seawater. Coupons which were permanently buried beneath a cap of settled CaCO3 particles exhibited a 70% reduction in corrosion rate compared with the representative control coupons. The results also show that for these exposure durations and conditions, while IRB and SRB bacterial species were identified in high concentrations (respectively ~1 × 106 cfu/g and ~1 × 102 to 4 × 106 cfu/g, depending on coupon orientation) within the rust products themselves after 18 months of exposure, there was no clear evidence of MIC. These findings indicate that short and medium term (non-accelerated) studies of MIC for mild steel are insufficient or even mis-leading for the prediction of long-term corrosion rates in these environments.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":"9 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139441742","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

Corrosion behavior of X80 steel in a simulated soil solution under Square Wave Current Interference 方波电流干扰下 X80 钢在模拟土壤溶液中的腐蚀行为

IF 1.6 4区材料科学

Corrosion Pub Date : 2024-01-09 DOI: 10.5006/4388

Liang Dong, Tiansiyu Gan, Qinfeng Song, Yan Qiu, Shaohua Zhang, Yongtao Zhao

{"title":"Corrosion behavior of X80 steel in a simulated soil solution under Square Wave Current Interference","authors":"Liang Dong, Tiansiyu Gan, Qinfeng Song, Yan Qiu, Shaohua Zhang, Yongtao Zhao","doi":"10.5006/4388","DOIUrl":"https://doi.org/10.5006/4388","url":null,"abstract":"\u0000 The buried pipeline is disturbed by the dynamic DC stray current with the subway as the main leakage source, which has the safety risk of accelerating corrosion, resulting in pipeline failure, which not only causes economic losses but also threatens personal safety. Therefore, it is necessary to study the corrosion behavior of pipeline steel under dynamic DC interference. Therefore, the corrosion behavior of X80 steel under dynamic DC interference were studied by mass loss test, AC impedance, circuit simulation, XRD, and Pourbaix diagram. Combined with the corrosion efficiency and Pourbaix diagram of the Fe-H2O system, the reversible process and reduction process mechanism in the Faraday process are proposed. The reason why the corrosion efficiency slows down in the process of non-Faraday is analyzed by the electric double layer model of equivalent circuit calculation. In addition, based on the above corrosion process, the corresponding conceptual model of the corrosion mechanism is proposed. The experimental results show that with the asymmetry of positive and negative half cycle interference duration and the increase of current density, the corrosion efficiency and current corrosion efficiency of X80 steel decrease, and local corrosion intensifies. The length of negative half cycle interference affects the capacitive charge-discharge effect at the metal/solution interface and the reduction reaction process of corrosion products, resulting in corrosion slowing down and corrosion efficiency reduction. This is also an important reason for the reduction of corrosion mass loss observed in the experiment compared with steady-state DC.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":"45 18","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139442343","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

Design and Discovery of Compositionally Complex Alloys (CCA) that Include High Corrosion Resistance 设计和发现具有高耐腐蚀性的成分复杂合金 (CCA)

IF 1.6 4区材料科学

Corrosion Pub Date : 2024-01-05 DOI: 10.5006/4451

S.B. Inman, J.R. Scully

{"title":"Design and Discovery of Compositionally Complex Alloys (CCA) that Include High Corrosion Resistance","authors":"S.B. Inman, J.R. Scully","doi":"10.5006/4451","DOIUrl":"https://doi.org/10.5006/4451","url":null,"abstract":"\u0000 The novel compositionally complex alloy (CCA) design space provides opportunities to improve corrosion resistance through design of passive films based on alloy composition and structure. The passive films are designed to provide corrosion protection by regulating charge transfer and transport processes operative during corrosion as well as by providing self-healing capability. Film protectivity can be obtained from single passivating element oxidation, passivity “helper” elements, secondary passivators, as well as other second and third element effects. Oxides can form congruently or enrich in certain elements and be depleted in others. The wide arrange of possible alloying combinations and resultant oxide compositions for a given design space necessitates efficient alloy selection for experimental synthesis and characterization of down-selected choices with high potential for good corrosion resistance. A design process for Al-Co-Cr-Fe-Mn-Mo-Ni containing CCAs providing testable strategies for effective incorporation of corrosion-influencing elements in the oxide is introduced. Guidelines for elemental selection for protection by passive oxides, compositional optimization, and microstructural refinement are discussed.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":"4 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139380944","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

Quantifying of the effects of secondary phases on corrosion in Mg-RE alloys by X-CT 利用 X-CT 量化次生相对 Mg-RE 合金腐蚀的影响

IF 1.6 4区材料科学

Corrosion Pub Date : 2024-01-04 DOI: 10.5006/4446

Chengming Yan, Guangyuan Tian, C. Xue, Zhihao Yang, Chi Zhang, Shuo Wang, Hui Su, Zhifei Yan, Yingchun Tian, Junsheng Wang

引用次数: 0

Entering 80 Years of Corrosion Research 腐蚀研究进入 80 周年

IF 1.6 4区材料科学

Corrosion Pub Date : 2024-01-01 DOI: 10.5006/4497

S. Miles, John R. Scully

引用次数: 0

Study on microstructure and corrosion properties of Ag-Ni-Co alloy electrodeposited in low eutectic solvent 在低共晶溶剂中电沉积的 Ag-Ni-Co 合金的微观结构和腐蚀特性研究

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-12-20 DOI: 10.5006/4475

Bowen Li, Fengze Pan, Chengyu Pan, Tianyi Lv, Xiaotian Wang, Xiang Ju, Kaifei Gong, Wenkai Zou, Chuanbo Zheng

引用次数: 0

Temperature Dependence of Adsorption and Effectiveness for a Pyrimidinium-Type Corrosion Inhibitor on Mild Steel 一种嘧啶类缓蚀剂在低碳钢上的吸附性和有效性与温度有关

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-12-20 DOI: 10.5006/4346

Yi He, Shuai Ren, Xi Wang, David Young, Maalek Mohamed-Said, Bernardo Augusto Farah Santos, Maria Eduarda Dias Serenario, Marc Singer

{"title":"Temperature Dependence of Adsorption and Effectiveness for a Pyrimidinium-Type Corrosion Inhibitor on Mild Steel","authors":"Yi He, Shuai Ren, Xi Wang, David Young, Maalek Mohamed-Said, Bernardo Augusto Farah Santos, Maria Eduarda Dias Serenario, Marc Singer","doi":"10.5006/4346","DOIUrl":"https://doi.org/10.5006/4346","url":null,"abstract":"\u0000 In the oil and gas industry, produced water with high dissolved salt content is a common byproduct of hydrocarbon extraction from conventional and unconventional wells. Other than salts, corrosive gases such as CO2 are abundant in the production stream, which dissolve and acidify the solution, posing a risk of internal pipeline corrosion. To mitigate this issue, the injection of corrosion inhibitors has emerged as a cost-effective approach. In various aggressive conditions, heterocyclic molecules that contain nitrogen atoms have proven to be highly effective corrosion inhibitors for many alloys. In this study, tetrahydropyrimidinium (THP-C14) inhibition efficiencies were investigated at temperatures of 25, 55, and 80 °C using electrochemical methods, including linear polarization resistance and potentiodynamic sweeps. Corrosion inhibition data were then correlated with THP-C14 concentration, using the five adsorption isotherms: Langmuir, Temkin, Frumkin, Flory-Huggins, and Dhar-Flory-Huggins models. These isotherms utilize different assumptions to establish the correlation between coverage and inhibitor concentration. The suitability of these five isotherm models for describing the corrosion inhibition behavior of THP-C14 was examined. In addition, the thermodynamic parameters (Kad,ΔadGo) of adsorption for THP-C14 at 25, 55 and 80 °C were calculated and compared using the aforementioned adsorption isotherm models. Finally, a mechanism was proposed for the adsorption behavior of the THP-C14 corrosion inhibitor model compound. Chloride ions were important for inhibitor adsorption.","PeriodicalId":10717,"journal":{"name":"Corrosion","volume":"63 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954577","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 Rinsing on Atmospheric Corrosion Environment of KT-1 Aircraft 冲洗对 KT-1 飞机大气腐蚀环境的影响

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-11-30 DOI: 10.5006/4364

Hyeok-Jun Kwon, Dongin Lim, Sungruul Park, Hwangjeong Cho, Dooyoul Lee

引用次数: 0

Bipolar metal bridge for electrochemical tests in autoclave 用于高压釜电化学测试的双极金属电桥

IF 1.6 4区材料科学

Corrosion Pub Date : 2023-11-30 DOI: 10.5006/4473

E. Hornus, Martín A. Rodríguez

引用次数: 0

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