{"title":"Accelerated microbiologically influenced corrosion of copper by sulfate-reducing bacterium Desulfovibrio desulfovibrio","authors":"Lijuan Chen, Jialin Li, Bo Wei, Jin Xu, Cheng Sun","doi":"10.1002/maco.202414451","DOIUrl":"10.1002/maco.202414451","url":null,"abstract":"<p>The corrosion behavior and electrochemical damage mechanisms induced by sulfate-reducing bacteria (SRB) on copper (Cu) were investigated in this study. Electrochemical impedance spectroscopy revealed that SRB accelerated the corrosion of Cu, albeit with a mitigating effect observed due to the formation of a protective and dense biofilm. However, upon the rupture of this protective film, the corrosion tendency of Cu significantly increased. Surface analysis corroborated these findings, with the predominant corrosion product identified as Cu2S, a result further supported by thermodynamic calculations. The accelerated corrosion of Cu was primarily attributed to the physiological metabolism of SRB, which generates hydrogen sulfide as the principal agent driving corrosion processes.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 11","pages":"1495-1505"},"PeriodicalIF":1.6,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743159","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}
Saqib Mukhtar, Richard Bureš, Miloslav Lhotka, Alžběta Danielisová, Drahomíra Malyková, Helena Březinová, Ludmila Barčáková, Šárka Šachlová, Vlastislav Kašpar, Václava Havlová, Jiří Němeček, Jan Stoulil
{"title":"Archeological analogs for the lifetime prediction of the canister for spent nuclear fuel in the deep geological repository: Part II. Evolution of the corrosion rate over time","authors":"Saqib Mukhtar, Richard Bureš, Miloslav Lhotka, Alžběta Danielisová, Drahomíra Malyková, Helena Březinová, Ludmila Barčáková, Šárka Šachlová, Vlastislav Kašpar, Václava Havlová, Jiří Němeček, Jan Stoulil","doi":"10.1002/maco.202414521","DOIUrl":"10.1002/maco.202414521","url":null,"abstract":"<p>This work focused on evaluating the evolution of the corrosion product layer and associated corrosion rates on archeological artifacts from 16 sites. Sites with clay soils and maximum waterlogging (pond bottoms and wetlands) were monitored. The corrosion products were evaluated by X-ray imaging, X-ray diffraction, scanning electron microscope, Brunauer–Emmett–Teller, and nanoindentation. Two stages of corrosion attack with slightly different mechanisms were observed. Corrosion rates observed at sites with continuous flooding show average corrosion rates of 0.4–1 μm.a<sup>−1</sup>. These values demonstrate a minimum service life of the container outer case of 15 × 10<sup>3</sup> years, which is several times longer than the required lifetime of the outer case.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 1","pages":"155-163"},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141645941","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}
{"title":"Contents: Materials and Corrosion. 7/2024","authors":"","doi":"10.1002/maco.202470073","DOIUrl":"https://doi.org/10.1002/maco.202470073","url":null,"abstract":"","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 7","pages":"826-829"},"PeriodicalIF":1.6,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202470073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141556673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cover Picture: Materials and Corrosion. 7/2024","authors":"Grzegorz Smola, Richard Gawel, Zbigniew Grzesik","doi":"10.1002/maco.202470071","DOIUrl":"https://doi.org/10.1002/maco.202470071","url":null,"abstract":"<p><b>Cover:</b></p><p>A multi-layered microstructure of the sulfide scale formed on Al<sub>20</sub>Co<sub>25</sub>Cr<sub>25</sub>Ni<sub>25</sub>Si<sub>5</sub> high entropy alloy at 900°C and 1 kPa of sulfur partial pressure (a), and corresponding EDS maps of elements distribution in the outer, compact part of the sulfide scale (b).</p><p>More detailed information can be found in: <i>Grzegorz Smola, Richard Gawel, Zbigniew Grzesik</i>, Sulfidation behavior of an AlCoCrNiSi high entropy alloy, <i>Materials and Corrosion</i> <b>2024</b>, <i>75</i>, 830.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 7","pages":"823"},"PeriodicalIF":1.6,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202470071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141556671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Masthead: Materials and Corrosion. 7/2024","authors":"","doi":"10.1002/maco.202470072","DOIUrl":"https://doi.org/10.1002/maco.202470072","url":null,"abstract":"","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 7","pages":"825"},"PeriodicalIF":1.6,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202470072","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141556672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"RETRACTION: Fabrication of a superhydrophobic surface on al alloy 5052 via combined anodic oxidation and fluorination treatment","authors":"","doi":"10.1002/maco.202470611","DOIUrl":"10.1002/maco.202470611","url":null,"abstract":"<p>RETRACTION: Lkhagvaa Telmenbayar, Tumur-Ochir Erdenebat, Minjung, Daejeong Yang, Ramu Adam Gopal, Dongjin Choi Fabrication of a superhydrophobic surface on Al alloy 5052via combined anodic oxidation and fluorination treatment, published in Materials and Corrosion, DOI 10.1002/maco.202012190. The above article, published online on 03 March 2021 in Wiley Online Library (wileyonlinelibrary.com), has been withdrawn by agreement between the journal JPM Regina Hagen, Author Dongjin Choi, and Wiley-VCH. The withdrawal has been agreed upon following that there was a minor problem with the materials authors used and they plan to resubmit after additional experiments. wileyonlinelibrary.com/journal/maco Materials and Corrosion. 2021;1–9.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 7","pages":"932"},"PeriodicalIF":1.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202470611","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Corrosion studies of SS 316H and Alloy 617 in thermally purified molten NaF-KF-UF4-UF3 salts","authors":"Qiufeng Yang, Amanda Leong, Jinsuo Zhang","doi":"10.1002/maco.202414299","DOIUrl":"10.1002/maco.202414299","url":null,"abstract":"<p>The study investigates salt chemistry and corrosion behavior of SS 316H and Alloy 617 in thermally purified molten NaF-KF-UF<sub>4</sub>-UF<sub>3</sub> salts (UF<sub>4</sub>/UF<sub>3</sub> initial ratio 12–14) at 800°C for 120, 72, and 32 h. UF<sub>4</sub>/UF<sub>3</sub> ratio increases after corrosion tests. Cr species concentration in salts keeps increasing. Fe, Co, Ni, and Mo species increase first, then decrease. Cr/Mn oxides are formed along grain boundaries in SS 316H. Cr near the surface of Alloy 617 is completely depleted. A thin layer composed of Fe, Co, Ni, and Mo is observed on the Alloy 617 surface in 72-h and 32-h tests.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 11","pages":"1438-1462"},"PeriodicalIF":1.6,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551887","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}
{"title":"Study of effects of rare earth elements on the corrosion behavior of weathering steels under a simulated immersion environment and a real atmospheric environment","authors":"Zengwei Fan, Zhong Xi, Tengshi Liu, Xintong Lian, Xicheng Wei, Han Dong","doi":"10.1002/maco.202414447","DOIUrl":"https://doi.org/10.1002/maco.202414447","url":null,"abstract":"<p>The effects of rare earth elements (REEs) on the corrosion behavior of weathering steels under a simulated immersion environment and a real atmospheric environment have been investigated in this paper. Although the corrosion rate of the indoor accelerated corrosion experiment (0.01 mol/L NaHSO<sub>3</sub>) is much higher than that of the real atmospheric exposure experiment, the addition of REEs can highly improve the corrosion resistance of test steels under both conditions. The improvement of the corrosion resistance can be attributed to the quick transformation of γ-FeOOH into α-FeOOH and the accelerated formation of a stable rust layer by REEs. Furthermore, the segregation of the REE inner rust layer increases the density of the rust layer and prevents corrosive particles from eroding the matrix. REEs can also promote the segregation of Cu, Cr, and other alloying elements in the rust layer, thus blocking the cracks and holes and enabling the formation of a continuous rust layer with good adhesion.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 11","pages":"1539-1548"},"PeriodicalIF":1.6,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595666","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}
Till König, Sebastian P. Hagen, Sannakaisa Virtanen, Mathias C. Galetz
{"title":"Hot corrosion Type I of novel Co-based γ/γ′ superalloys with and without Al- and Cr-diffusion coatings","authors":"Till König, Sebastian P. Hagen, Sannakaisa Virtanen, Mathias C. Galetz","doi":"10.1002/maco.202414351","DOIUrl":"https://doi.org/10.1002/maco.202414351","url":null,"abstract":"<p>Co-based γ/γ′ superalloys are in development as candidates to replace Ni-based superalloys in turbine engines, where they will be exposed to hot corrosion. The present study investigates the resistance to high temperature Type I hot corrosion of four alloys of the Co–Ni–Al–W system, which differed in their Co to Ni ratio and their W content. In addition, the alloys are tested not only uncoated but also with an Al and a Cr diffusion coating. The exposures were performed at 950°C with a Na<sub>2</sub>SO<sub>4</sub> deposit of 2.5 mg/cm<sup>2</sup> in air containing 0.1% SO<sub>2</sub> for 100 and 300 h. The degradation was investigated by material loss measurements. Both coatings proved mostly protective for 100 h, while the uncoated samples were severely degraded. After the longer exposure time, only the Cr-coating remained partially protective and outmatched the Al-coating. Further, a positive influence was attributed to a higher Co to Ni ratio (1.4 vs. 0.7) and a higher W content (5 vs. 3 at%).</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 12","pages":"1583-1599"},"PeriodicalIF":1.6,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202414351","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. S. Barros, S. S. M. Tavares, A. R. Pimenta, R. T. Batista, J. A. C. Velasco
{"title":"Sulfide stress corrosion (SSC) susceptibilities of duplex stainless steels 2205 produced by powder metallurgy (HIP) and hot rolling","authors":"T. S. Barros, S. S. M. Tavares, A. R. Pimenta, R. T. Batista, J. A. C. Velasco","doi":"10.1002/maco.202414418","DOIUrl":"https://doi.org/10.1002/maco.202414418","url":null,"abstract":"<p>Owing to their excellent properties, duplex stainless steels (DSSs) may be selected for the H<sub>2</sub>S environment. Operational limits are not defined and depend on fabrication processes. In this work, the susceptibilities of two DSSs 2205 to sulfide stress corrosion (SSC) in saline solutions with three pH levels were investigated. The difference between materials is the fabrication route: hot rolled (HR) tubes and powder metallurgy with compacting and sintering final operations by hot isostatic pressing (PM-HIP). The susceptibility parameters were evaluated by slow strain rate tensile tests (SSRT). Both materials suffered embrittlement in solutions with pH 3.5 and 4.5, but the susceptibility was slightly better in the HR. In the solution with pH 5.5, the HR fractured with ductile behavior, while the PM-HIP was brittle. The better resistance of HR to SSC can be explained by microstructural features, such as the lower grain size and austenite island interspace.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"75 11","pages":"1528-1538"},"PeriodicalIF":1.6,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596270","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}