Materials and Corrosion-werkstoffe Und Korrosion最新文献

{"title":"High-Temperature Corrosion Behavior of Typical Steels in Novel NaNO3-KNO3-Ca(NO3)2 Molten Salt","authors":"Xinjun Xu,&nbsp;Jianguang Xu,&nbsp;Bo Li,&nbsp;Qingqing Yong,&nbsp;Kaijing Yuan,&nbsp;Zhongfeng Tang","doi":"10.1002/maco.70142","DOIUrl":"https://doi.org/10.1002/maco.70142","url":null,"abstract":"<div>\u0000 \u0000 <p>The corrosion behavior and mechanism of typical steels in the novel proportion NaNO₃-KNO₃-Ca(NO₃)₂ (16-48-36 wt%, NKC) molten salt have been reported. Static corrosion tests of 347H stainless steel (347H), 321 stainless steel (321SS) and 20# carbon steel (20#CS) were conducted in NKC salt at 480°C for 360 h. Their annual corrosion rates are 10.5, 12.9, and 31.4 µm/year separately, and the corrosion resistance ranks as 347H &gt; 321SS &gt; 20#CS. Corrosion is primarily driven by selective oxidation and elemental dissolution. 347H forms a dense (Fe,Cr)₂O₃ layer with a flat surface and minor granular products. 321SS undergoes chromium depletion and precipitation, resulting in the formation of Fe₂O₃ and Fe-Ni phases, which lead to uneven local corrosion. 20#CS develops a porous Fe₂O₃/Fe₃O₄ mixed layer characterized by distinct pits and general corrosion. These findings provide new insights into steel corrosion and key data for material selection.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1254-1261"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667212","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":"Hot Corrosion Performance of Inconel 625 in 60% NaNO₃–40% KNO₃ at 550°C: A Study for Sustainable Energy Systems","authors":"N. Pavithradevi,&nbsp;B. Arulmurugan","doi":"10.1002/maco.70141","DOIUrl":"https://doi.org/10.1002/maco.70141","url":null,"abstract":"<div>\u0000 \u0000 <p>The use of concentrated solar power (CSP) structures is raising owed to the expanding claim for sustainable energy. Thermal energy storage (TES) acts a valuable function in focusing this issue. The present study investigated the high temperature corrosion behaviour of Inconel 625 for CSP structural applications exposed to a hot corrosion condition of 60% NaNO₃–40% KNO₃ solar salt at 550°C. The corrosion behaviour of the substrate was estimated at several intervals varying from 100 to 500 h. The corrosion kinetics were estimated through the weight variation process, and the degradation of the specimens was studied through field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction analysis. The results confirm that initial corrosion resistance is controlled by a protective Cr₂O₃ layer, while prolonged exposure leads to Cr depletion, oxide breakdown, and formation of non-protective MoO₃ and Fe₂O₃. The growth of NiCr₂O₃ specifies good corrosion resistance around a 400-h interval. The study provides key insights into material selection and durability for TES containers in CSP applications.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1240-1253"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667221","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":"A Mechanistic Model for Predicting Top-of-the-Line Corrosion in CO2/H2S Environments: Validation and Field Application","authors":"Farnoosh Khoshandam,&nbsp;Mehdi Javidi","doi":"10.1002/maco.70156","DOIUrl":"https://doi.org/10.1002/maco.70156","url":null,"abstract":"<div>\u0000 \u0000 <p>This study develops a mechanistic model to predict top-of-the-line corrosion (TLC) in wet natural gas pipelines under sweet (CO₂) and sour (CO₂/H₂S) conditions. The framework incorporates water condensation, CO₂–H₂S–organic acid aqueous speciation, electrochemical kinetics, and corrosion product film formation, emphasizing rapid FeS precipitation in sour service. The proposed sour model reproduced published laboratory data with a mean absolute deviation &lt; 45% across gas compositions (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <msub>\u0000 <mi>p</mi>\u0000 \u0000 <msub>\u0000 <mi>CO</mi>\u0000 \u0000 <mn>2</mn>\u0000 </msub>\u0000 </msub>\u0000 </mrow>\u0000 </mrow>\u0000 </semantics></math>:2-10 bar, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <msub>\u0000 <mi>p</mi>\u0000 \u0000 <mrow>\u0000 <msub>\u0000 <mi>H</mi>\u0000 \u0000 <mn>2</mn>\u0000 </msub>\u0000 \u0000 <mi>S</mi>\u0000 </mrow>\u0000 </msub>\u0000 </mrow>\u0000 </mrow>\u0000 </semantics></math>:0-2 bar), wall temperatures (15°C–75°C), condensation rates (0.002–0.25 ml/m²·s), and organic acid concentrations (0–1300 ppm), while the deviation for sweet service was &lt; 16%. The sour TLC model applied to two offshore sour natural gas transmission pipelines showed strong agreement with in-line inspection data. Field simulations indicate that the highest sour TLC rates occur at steel surface temperatures of 20°C–35°C, with a maximum corrosion rate of 0.9 mm/year. High condensation rates alone do not cause TLC; significant corrosion can occur even at low condensation rates (0.00002–0.15 g/m²·s). This work establishes one of the first unified mechanistic framework for predicting sour TLC.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1298-1320"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667249","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":"Optimization of Y Addition in a Tribaloy-Type Alloy for Improved Oxidation Resistance","authors":"Jiahong Zhu,&nbsp;Giovanni Mainardi,&nbsp;Brian Bates,&nbsp;Ying Zhang","doi":"10.1002/maco.70140","DOIUrl":"https://doi.org/10.1002/maco.70140","url":null,"abstract":"<div>\u0000 \u0000 <p>While Tribaloy alloys such as T-400C and T-900 have shown promising high-temperature oxidation and wear performance, additional compositional optimization is needed to further enhance their corrosion resistance for protecting high-temperature components in corrosive environments. In this paper, the amount of the reactive element Y was varied in the Co-20Cr-18Mo-2.6Si-xY (wt.%) alloy system (x = 0–1.1) and its effect on the oxidation resistance at 800°C in air was evaluated. Based on specific mass change data together with surface and cross-sectional microstructural observations, the optimal Y content was determined to be approximately 0.6–0.7 wt.%. Partial replacement of Co with Ni in the Y-containing alloy further enhanced its oxidation performance.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1234-1239"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667182","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":"Enhanced Corrosion Resistance of Hybrid LM13 Composites Reinforced With Zirconium Carbide and Flyash Using Squeeze Casting","authors":"B. Prakash,&nbsp;S. Irudayaraj,&nbsp;N. Sivanantham","doi":"10.1002/maco.70145","DOIUrl":"https://doi.org/10.1002/maco.70145","url":null,"abstract":"<div>\u0000 \u0000 <p>In the current study, the corrosion behavior of the LM13 alloy reinforced with zirconium carbide (ZrC) and flyash composites was evaluated. The composites were manufactured by varying ZrC (3–9 wt.%) and flyash (3 wt.%) by the process of stir casting and squeeze casting, and corrosion studies were carried out in the acidic medium by potentiodynamic polarization. Scanning electron microscope (SEM) was used to study the corrosion-induced surface morphology, and the pit density was quantified to correlate the microstructure. The unreinforced LM13 alloy reveals localized pitting and the highest corrosion density, which indicates the formation of passive film stability. The hybrid composites reveal a reduced corrosion current density and pit density due to the presence of reinforcements. Among the manufactured composites, LM13–6 wt.% ZrC–3 wt.% flyash composite showed the lowest corrosion current density and a homogenous passive layer.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1321-1332"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667389","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. 8/2026","authors":"","doi":"10.1002/maco.70207","DOIUrl":"https://doi.org/10.1002/maco.70207","url":null,"abstract":"","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1218-1221"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.70207","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667436","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":"Correction to “The Use of Hydrogen in Monitoring the Anoxic Corrosion of Copper”","authors":"","doi":"10.1002/maco.70204","DOIUrl":"https://doi.org/10.1002/maco.70204","url":null,"abstract":"<p>N. Senior, T. Martino, P. G. Keech, W. Jeffrey Binns, N. Diomidis, C. Lilja, Mater. Corros. 2023, 1–11. https://doi.org/10.1002/maco.202313769.</p><p>Thermal desorption analyses were used to calculate the activation energy of hydrogen outgassing from electrodeposited copper. This was then extrapolated to 75°C, the test temperature of several anoxic aqueous corrosion cells. The intention was to investigate the source of the hydrogen recorded from the cells; either from corrosion, through outgassing of hydrogen initially present in the copper, or a combination of both. A mathematical error was made when deriving the ‘H₂ model’ line, resulting in a significantly elongated hydrogen outgassing curve. Correction of this error demonstrates that hydrogen outgassing at 75°C should be completed within a matter of weeks. This strengthens the argument that the hydrogen recorded over the 2-year period was primarily due to surface (not bulk) corrosion, and not hydrogen outgassing. The corrected Figures 6 and 7 are shown below.</p><p>We apologize for this error.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1385-1386"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.70204","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667460","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":"Contents: Materials and Corrosion. 8/2026","authors":"","doi":"10.1002/maco.70207","DOIUrl":"https://doi.org/10.1002/maco.70207","url":null,"abstract":"","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1218-1221"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.70207","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667482","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":"Effects of Different Surfactants (PEG/CTAB and Their Combinations) on Corrosion Resistance of Ni-P-Si3N4 Composite Coatings","authors":"Zhixin Chen,&nbsp;Jinrong Duan,&nbsp;Jiafen Wang,&nbsp;Fang Si,&nbsp;Yunlong Wu,&nbsp;Yanyan Song","doi":"10.1002/maco.70144","DOIUrl":"https://doi.org/10.1002/maco.70144","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, the effects of surfactants such as PEG, CTAB and their combination (PEG: CTAB) on the microstructure and corrosion resistance of Ni-P-Si₃N₄ composite coating were systematically studied. The electrochemical test shows that adding PEG or CTAB can reduce the coating defects and improve the corrosion resistance. When PEG and CTAB are used in combination, they show synergistic effect, which further enhances the compactness and corrosion protection of the coating. Among them, when the composite ratio is 3:1 (CTAB: PEG), the corrosion current density is significantly reduced, and the stability of the coating in corrosive medium is improved.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1346-1356"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667190","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":"High-Temperature Corrosion Behavior of Typical Steels in Novel NaNO3-KNO3-Ca(NO3)2 Molten Salt","authors":"Xinjun Xu,&nbsp;Jianguang Xu,&nbsp;Bo Li,&nbsp;Qingqing Yong,&nbsp;Kaijing Yuan,&nbsp;Zhongfeng Tang","doi":"10.1002/maco.70142","DOIUrl":"https://doi.org/10.1002/maco.70142","url":null,"abstract":"<div>\u0000 \u0000 <p>The corrosion behavior and mechanism of typical steels in the novel proportion NaNO₃-KNO₃-Ca(NO₃)₂ (16-48-36 wt%, NKC) molten salt have been reported. Static corrosion tests of 347H stainless steel (347H), 321 stainless steel (321SS) and 20# carbon steel (20#CS) were conducted in NKC salt at 480°C for 360 h. Their annual corrosion rates are 10.5, 12.9, and 31.4 µm/year separately, and the corrosion resistance ranks as 347H &gt; 321SS &gt; 20#CS. Corrosion is primarily driven by selective oxidation and elemental dissolution. 347H forms a dense (Fe,Cr)₂O₃ layer with a flat surface and minor granular products. 321SS undergoes chromium depletion and precipitation, resulting in the formation of Fe₂O₃ and Fe-Ni phases, which lead to uneven local corrosion. 20#CS develops a porous Fe₂O₃/Fe₃O₄ mixed layer characterized by distinct pits and general corrosion. These findings provide new insights into steel corrosion and key data for material selection.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1254-1261"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667214","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}