KOM – Corrosion and Material Protection Journal最新文献

Comparative investigation on the influence of metakaolin, metaillite and steel slag as SCMs in mortar on the corrosion behavior of embedded steel 偏高岭土、偏钛石和钢渣作为砂浆中SCMs对预埋钢腐蚀行为影响的对比研究

KOM – Corrosion and Material Protection Journal Pub Date : 2023-05-01 DOI: 10.2478/kom-2023-0004

R. Achenbach, M. Raupach

{"title":"Comparative investigation on the influence of metakaolin, metaillite and steel slag as SCMs in mortar on the corrosion behavior of embedded steel","authors":"R. Achenbach, M. Raupach","doi":"10.2478/kom-2023-0004","DOIUrl":"https://doi.org/10.2478/kom-2023-0004","url":null,"abstract":"Abstract With the aim of saving CO2 in cement production, various approaches are currently being pursued in the development of new materials. One possibility is to reduce the ratio of clinker to cement by using supplementary cementitious materials (SCMs). Some SCMs like fly ash or granulated blast furnace slag have been used successfully in cement for a long time and their use is covered by standards. Since the availability of these materials cannot be ensured in the long term, alternative additives are also being tested. The results presented here were obtained as part of a joint research project that was carried out in cooperation with the Bauhaus University Weimar. In this study, three different SCMs are investigated with regard to their effect on the corrosion of steel embedded in mortars: A metakaolin, a metaillite, and a modified steel mill slag were each tested at a proportion of 30 wt.% in a CEM I reference cement. In the two-stage tests, the passivation behavior of steel in mortars was first investigated in electrochemical tests. Based on this, tests were carried out in leached solutions of the different binders with different Cl–/OH– ratios. The results show that all the blended types of cement investigated provide passivation of the steel in mortar. The use of the calcined clays metakaolin or metaillite resulted in higher polarization resistances and lower passive current densities as well as increased electrical resistivities, especially for metakaolin. The steel in mortar with the steel mill slag showed comparable electrochemical behavior to the OPC mortar. The tests in leached solutions slightly indicate a higher corrosion-inducing Cl–/OH– ratio when using metakaolin or steel mill slag.","PeriodicalId":404545,"journal":{"name":"KOM – Corrosion and Material Protection Journal","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127259903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrothermal synthesis and characterization of calcium phosphate-based coatings on AZ31 magnesium alloy AZ31镁合金表面磷酸钙基涂层的水热合成及表征

KOM – Corrosion and Material Protection Journal Pub Date : 2023-05-01 DOI: 10.2478/kom-2023-0002

L. Horáková, L. Doskočil, J. Wasserbauer, M. Buchtík

引用次数: 0

Are you lead historical artefacts safely stored? 你是否将历史文物安全存放?

KOM – Corrosion and Material Protection Journal Pub Date : 2023-05-01 DOI: 10.2478/kom-2023-0003

J. Švadlena, M. Kouřil, T. Boháčková, T. Prošek

引用次数: 0

Effect of process conditions for the preparation of a manganese-based coating on the surface of AZ31 magnesium alloy 工艺条件对AZ31镁合金表面制备锰基涂层的影响

KOM – Corrosion and Material Protection Journal Pub Date : 2023-05-01 DOI: 10.2478/kom-2023-0001

L. Doskočil, P. Šomanová, M. Buchtík, J. Wasserbauer

引用次数: 0

Corrosion assessment of a bronze equestrian statue exposed to urban environment 暴露在城市环境中的青铜马术雕像的腐蚀评估

KOM – Corrosion and Material Protection Journal Pub Date : 2022-01-01 DOI: 10.2478/kom-2022-0008

L. Es Sebar, L. Iannucci, S. Grassini, E. Angelini, M. Parvis, R. Antonino, G. Quaranta, C. Giani, M. Boassa, M. Nicola

{"title":"Corrosion assessment of a bronze equestrian statue exposed to urban environment","authors":"L. Es Sebar, L. Iannucci, S. Grassini, E. Angelini, M. Parvis, R. Antonino, G. Quaranta, C. Giani, M. Boassa, M. Nicola","doi":"10.2478/kom-2022-0008","DOIUrl":"https://doi.org/10.2478/kom-2022-0008","url":null,"abstract":"Abstract This paper presents the characterization of the conservation state of a bronze equestrian statue exposed outdoor, through an in-situ, multi-analytical, and non-invasive approach. The artefact under study is a bronze equestrian statue, devoted to Alfonso La Marmora, placed in an urban environment in the city of Turin. The investigation was carried out in the framework of a restoration intervention, with the principal aim of characterizing the overall conservation state of the sculpture to provide the conservators with information useful to develop a tailored restoration plan. X-ray fluorescence spectroscopy (XRF) was carried out for the identification of the elements present in the artefact alloy, showing that the statue was made using mainly two bronze alloys. Electrochemical Impedance Spectroscopy (EIS) was performed to study the corrosion mechanisms and to define the protective effectiveness of the patina present on the surfaces. Eventually, Raman spectroscopy (RS) was performed to characterize the chemistry and microstructure of the corrosion products, mainly identified as sulphates. The combination of these techniques allowed to confirm the presence of wax layers from previous restoration work, still capable to protect the metal substrate against corrosion. In addition, it was possible to correlate the conservation state to the exposure conditions and location on the statue.","PeriodicalId":404545,"journal":{"name":"KOM – Corrosion and Material Protection Journal","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126627875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental assessment of packaging paper properties effect in combination with storage conditions on the adhesion performance of automotive glass 包装纸性能与储存条件对汽车玻璃粘附性能影响的实验研究

KOM – Corrosion and Material Protection Journal Pub Date : 2022-01-01 DOI: 10.2478/kom-2022-0009

T. Kordová, A. Mareška, Míka M. Havlík

{"title":"Experimental assessment of packaging paper properties effect in combination with storage conditions on the adhesion performance of automotive glass","authors":"T. Kordová, A. Mareška, Míka M. Havlík","doi":"10.2478/kom-2022-0009","DOIUrl":"https://doi.org/10.2478/kom-2022-0009","url":null,"abstract":"Abstract The aim of this work was an experimental comparison of different types of packaging paper, determining the effect of packaging material properties in combination with storage conditions on the purity of glass surface and the related quality of adhesion of bonded materials. In the automotive industry, the quality of adhesion is a key factor, as automotive glass must meet the safety requirements. During the experiments, the glass sheets were wrapped in four types of paper and stored according to the conditions that are common in a real production. The research was focused on the influence of different composition of packaging papers on the resulting adhesive properties of glass sheets. According to the results obtained in this work, it can be stated that during the storage there is an interaction between paper and glass. According to XRF analyzes, ongoing corrosion of the glass can be inferred. The resulting adhesion was assessed based on a peel test, which took place under defined conditions given by standard customer specifications. It has been observed that the negative effect of unsuitable paper increases over time. For optimal adhesion it is necessary to emphasize the packaging materials and the storage conditions of the glass. The results and knowledge achieved in this work can significantly improve the quality of production in which a material is glued to the glass surface.","PeriodicalId":404545,"journal":{"name":"KOM – Corrosion and Material Protection Journal","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131689733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Corrosion and tribological behaviour of Friction Stir Processed AA2024-T351 alloy 搅拌摩擦处理AA2024-T351合金的腐蚀和摩擦学行为

KOM – Corrosion and Material Protection Journal Pub Date : 2022-01-01 DOI: 10.2478/kom-2022-0012

Lakshman R. B. Hari, A. Ashwin, Vignesh R. Vaira, Swaroop C. B. Chand, M. Vignesh, R. Padmanaban

{"title":"Corrosion and tribological behaviour of Friction Stir Processed AA2024-T351 alloy","authors":"Lakshman R. B. Hari, A. Ashwin, Vignesh R. Vaira, Swaroop C. B. Chand, M. Vignesh, R. Padmanaban","doi":"10.2478/kom-2022-0012","DOIUrl":"https://doi.org/10.2478/kom-2022-0012","url":null,"abstract":"Abstract AA2024-T351, a heat treatable aluminum alloy, has a high strength to weight ratio and good fracture resistance and has application mainly in the aircraft and aerospace sector. However, the alloy is susceptible to high corrosion because of the secondary phases (Al2Cu) present in the matrix. With an objective to increase the corrosion and wear resistance, Friction Stir Processing is applied to engineer the morphology and dispersion of the Al2Cu phase in the alloy. The friction stir processing trials are performed by varying the tool rotation speed, tool traverse speed, and shoulder diameter, as the properties of the friction stir processed region depend on the proper selection of process parameters. A hybrid linear-radial basis function model is developed to explore the effect of tool rotation speed, tool traverse speed, and shoulder diameter on the grain size, microhardness, corrosion rate, wear rate, and corrosion potential of the friction stir processed AA2024-T351 alloy. The predominant corrosion mechanism and wear regimes in AA2024-T351 alloy are understood from the characterization study on the surface morphology and elemental analysis of the corroded and worn specimens. The optimum friction stir processing parameters that improve the grain refinement, microhardness, corrosion resistance and wear resistance of AA2024-T351 alloy are established.","PeriodicalId":404545,"journal":{"name":"KOM – Corrosion and Material Protection Journal","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123536946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Growth kinetics of diiron boride (Fe2B) layer on a carbon steel by four approaches 四种方法制备碳钢上硼化二铁(Fe2B)层的生长动力学

KOM – Corrosion and Material Protection Journal Pub Date : 2022-01-01 DOI: 10.2478/kom-2022-0001

B. Bouarour, M. Keddam, B. Boumaali

引用次数: 1

Resistance of the welded joint of austenitic steel NEUTRONIT A 976 SM in the corrosive environment of boric acid 奥氏体钢NEUTRONIT A 976sm焊接接头在硼酸腐蚀环境中的耐蚀性

KOM – Corrosion and Material Protection Journal Pub Date : 2022-01-01 DOI: 10.2478/kom-2022-0004

J. Zavitkovská, Z. Fulin, M. Chocholoušek, Z. Špirit

引用次数: 0

Innovative accident tolerant nuclear fuel materials will help extending the life of light water reactors 创新的耐事故核燃料材料将有助于延长轻水反应堆的寿命

KOM – Corrosion and Material Protection Journal Pub Date : 2022-01-01 DOI: 10.2478/kom-2022-0006

R. Rebak

引用次数: 1