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Effect of the presence of corrosion products on the corrosion rate of lead during the exposition with paper packaging materials 在纸包装材料博览会期间，腐蚀产物的存在对铅腐蚀速率的影响
Koroze a ochrana materialu Pub Date : 2018-07-01 DOI: 10.1515/kom-2018-0013
K. Strachotová, M. Kouřil
{"title":"Effect of the presence of corrosion products on the corrosion rate of lead during the exposition with paper packaging materials","authors":"K. Strachotová, M. Kouřil","doi":"10.1515/kom-2018-0013","DOIUrl":"https://doi.org/10.1515/kom-2018-0013","url":null,"abstract":"Abstract High sensitivity of lead to organic compounds leads to degradation of historical lead objects stored in the depositories of museums or archives. High concentration of organic compounds in the atmosphere of depositories is caused by degradation of organic materials (wood, glue, leather, paper). Organic materials are stored together with lead objects or they are used as a packaging material. This study was aimed on the influence of packaging material properties to aggressiveness towards lead with different state of surface by the resistometric method. The results showed that aggressiveness of packaging material is determined by a complex influence of material properties. The presence of corrosion products on the lead surface significantly increases its sensitivity to organic compounds.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"87 - 96"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48390516","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: 7
Condition evaluation of steel X65 in one of the sections of “Soyuz” gas main after long-term operation X65钢在“联盟”号天然气总管一段长期运行后的状态评估
Koroze a ochrana materialu Pub Date : 2018-07-01 DOI: 10.1515/kom-2018-0011
P. Maruschak, R. Bishchak, O. Maruschak, D. Draganovská, A. Pylypenko
{"title":"Condition evaluation of steel X65 in one of the sections of “Soyuz” gas main after long-term operation","authors":"P. Maruschak, R. Bishchak, O. Maruschak, D. Draganovská, A. Pylypenko","doi":"10.1515/kom-2018-0011","DOIUrl":"https://doi.org/10.1515/kom-2018-0011","url":null,"abstract":"Abstract The basic regularities in deformation and fracture of pipe steel X65 are revealed by testing specimens from the pipe fragment cut during the repair of the “Soyuz” gas main after 30 years of operation. It is shown that the pipe steel slightly changes its properties when the gas main is operated under the influence of working stresses and environmental factors. Structural degradation and micro-defects accumulated in the pipe wall were scattered, indicating that the material retains sufficient plasticity that allows it to resist fracture processes and the nucleation of macrocracks.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"78 - 82"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49330844","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: 4
Influence of deformation on electrochemical properties of Q235 steel 变形对Q235钢电化学性能的影响
Koroze a ochrana materialu Pub Date : 2018-07-01 DOI: 10.1515/kom-2018-0015
M. Zheng, M. Shuai, J. Yu
{"title":"Influence of deformation on electrochemical properties of Q235 steel","authors":"M. Zheng, M. Shuai, J. Yu","doi":"10.1515/kom-2018-0015","DOIUrl":"https://doi.org/10.1515/kom-2018-0015","url":null,"abstract":"Abstract The influence of deformation on electrochemical properties of Q235 steel is studied. The uni-axial tension of the steel is conducted on universal testing machine to get a series of strain, 0.07%, 6%, 11% and 24%, respectively. The deformation process for strain of 0.07% is controlled by load, and the others are controlled by displacement correspondingly. Afterward, the tests of potentiodynamic polarization and electrochemical impedance spectroscopy are conducted for the deformed steel in 0.01 mol.dm−3 NaCl solution. The results showed that plastic deformation leads to crystalline grains refine and elongate, and crystalline boundary increases, it induces more corrosive possibility and lower corrosive resistance; the corrosion potential of Q235 steel becomes more negative with the increase of deformation amount, and the corrosion current density increases with the amount of deformation; the corrosion resistance decrease with the increase of deformation seriously.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"108 - 114"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46206678","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
Influencing the anticorrosion efficiency of pigments based on zinc ferrite by conductive polymers 导电聚合物对铁酸锌基颜料防腐性能的影响
Koroze a ochrana materialu Pub Date : 2018-07-01 DOI: 10.1515/kom-2018-0012
K. Nechvílová, A. Kalendová
{"title":"Influencing the anticorrosion efficiency of pigments based on zinc ferrite by conductive polymers","authors":"K. Nechvílová, A. Kalendová","doi":"10.1515/kom-2018-0012","DOIUrl":"https://doi.org/10.1515/kom-2018-0012","url":null,"abstract":"Abstract Generally, organic coatings which contain zinc ferrites are able to protect metal substrate, most often low-carbon steel, by inhibition mechanism. Conductive polymers are using a system of conjugated double-bonds to transfer a charge over the chain thereby providing their own electrical conductivity in the organic coatings. The charge from the chain in combination with the iron substrate generates electrons to the formation of passivation products on the surface of paint film. This paper is focused on combination of zinc ferrite with conductive polymer and using of synergic effect of these two components. The organic coatings were formulated from hematite and specularite on pigments concentration line 5, 10, 20 and 25 wt.% for better recognizing of the effectiveness of zinc ferrite component. The content of the conductive polymer was consistently set at 3 wt.% in each organic coating. A solvent-based epoxy-ester resin was used as a binder. The physico-mechanical and corrosion tests were performed for all samples. The corrosion signs were evaluated on the surface of coating and also on the surface of metal substrate. In the end, the efficiency was compared alone zinc ferrite and alone polymers and also their combinations.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"83 - 86"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44355451","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
Soft computing model for analysing the effect of friction stir processing parameters on the intergranular corrosion susceptibility of aluminium alloy AA5083 分析搅拌摩擦工艺参数对AA5083铝合金晶间腐蚀敏感性影响的软计算模型
Koroze a ochrana materialu Pub Date : 2018-07-01 DOI: 10.1515/kom-2018-0014
R. Vignesh, R. Padmanaban, C. K.
{"title":"Soft computing model for analysing the effect of friction stir processing parameters on the intergranular corrosion susceptibility of aluminium alloy AA5083","authors":"R. Vignesh, R. Padmanaban, C. K.","doi":"10.1515/kom-2018-0014","DOIUrl":"https://doi.org/10.1515/kom-2018-0014","url":null,"abstract":"Abstract Aluminium alloy AA5083 is prone to intergranular corrosion in marine environments. In an attempt to reduce the intergranular corrosion, AA5083 was subjected to friction stir processing (FSP). The FSP experimental trials were conducted as per face-centered central composite design with three levels of variation in FSP process parameters viz. tool rotation speed (TRS), tool traverse speed (TTS) and tool shoulder diameter (SD). Intergranular corrosion susceptibility of the processed specimens was assessed by performing nitric acid mass loss test. The mass loss of the specimens was correlated with the intergranular corrosion susceptibility as per the standard ASTM G67-13. The experimental results indicate that FSP had significantly reduced the intergranular corrosion susceptibility of the AA5083 alloy. Soft computing techniques namely Artificial Neural Network, Mamdani Fuzzy system, and Sugeno Fuzzy system were used to predict the intergranular corrosion (IGC) susceptibility (mass loss) of the friction stir processed specimens. Among the developed models, Sugeno fuzzy system displayed minimum percentage error in prediction. So Sugeno fuzzy system was used to analyze the effect of friction stir processing process parameters on the IGC of the processed specimens. The results suggest that stir processing of AA5083 at a TRS of 1300 rpm, TTS of 60 mm/min and SD of 21 mm would make the alloy least susceptible to intergranular corrosion.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"107 - 97"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/kom-2018-0014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43343366","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: 6
Failure of electric products by H2S 电气产品被H2S破坏
Koroze a ochrana materialu Pub Date : 2018-05-01 DOI: 10.1515/kom-2018-0010
D. Majtás, K. Kreislová, L. Turek
{"title":"Failure of electric products by H2S","authors":"D. Majtás, K. Kreislová, L. Turek","doi":"10.1515/kom-2018-0010","DOIUrl":"https://doi.org/10.1515/kom-2018-0010","url":null,"abstract":"Abstract Copper is widely used metal for industrial and public purposes due to its good corrosion resistance and excellent electrical conductivity. In indoor atmospheric environments with low level of air pollution the corrosion rate of copper is very low and it is not affected by slight increasing of temperature or relative humidity. In many indoor environment hydrogen sulphide (H2S) occurs and significantly affects the copper corrosion. CuS is a loose of black corrosion product which can’t form protective film on copper surface and promote corrosion by adsorption of moisture as carrier. In sulphide presence, the corrosion product is chalcocite Cu2S. Copper corrosion attack by H2S low concentration caused significant failure of electronic, electric equipment but also other copper parts as tubes, etc. These corrosion films can form an insulating layer on the contact surfaces causing electrical failures on the electronic devices.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"71 - 77"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48792390","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: 3
EIS and corrosion behaviour of plasma sprayed layers of Al and AlCr6Fe2 on AZ91 Al和AlCr6Fe2等离子喷涂层在AZ91表面的EIS和腐蚀行为
Koroze a ochrana materialu Pub Date : 2018-05-01 DOI: 10.1515/kom-2018-0007
F. T. Kubatík, J. Stoulil, F. Lukáč, K. Stehlíková, P. Slepička
{"title":"EIS and corrosion behaviour of plasma sprayed layers of Al and AlCr6Fe2 on AZ91","authors":"F. T. Kubatík, J. Stoulil, F. Lukáč, K. Stehlíková, P. Slepička","doi":"10.1515/kom-2018-0007","DOIUrl":"https://doi.org/10.1515/kom-2018-0007","url":null,"abstract":"Abstract This work presents the preparation of coatings of aluminium and AlCr6Fe2 alloy on magnesium alloy AZ91 with metallurgical bonding. Coatings were prepared by plasma spraying system WSP®-H 500. This metallurgical bond (sub-layer) is formed by an eutectic structure consisting of the intermetallic phase Mg17Al12 and the solid solution of magnesium and aluminium. In this work, the layers were studied using electrochemical impedance spectroscopy (EIS). It was shown that there is a several fold increase of the polarization resistance (Rcν) of plasma-sprayed coatings of aluminium and AlCr6Fe2 alloy, compared with uncoated AZ91 in borate buffer with pH 9.1.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"33 - 44"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/kom-2018-0007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47831948","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
Influence of the adhesive type and metal substrate on adhesion of bonded joints after salt spray test 盐雾试验后胶粘剂类型和金属基材对粘结接头附着力的影响
Koroze a ochrana materialu Pub Date : 2018-05-01 DOI: 10.1515/kom-2018-0006
K. Machalická, P. Pokorný, M. Vokáč
{"title":"Influence of the adhesive type and metal substrate on adhesion of bonded joints after salt spray test","authors":"K. Machalická, P. Pokorný, M. Vokáč","doi":"10.1515/kom-2018-0006","DOIUrl":"https://doi.org/10.1515/kom-2018-0006","url":null,"abstract":"Abstract This article was focused on the evaluation of neutral salt spray test effect (according to ISO 9124), procedure E4, on mechanical properties of load-bearing adhesive joints. The study also comprises the influence of substrate material (mild steel, aluminum alloys) and substrate surface roughness (verified by optical confocal microscopy). The experimental program contained acrylate-based adhesive and hybrid silicone polyurethane based adhesive which were applied in double lap joints loaded by shear.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"54 - 64"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46209366","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: 2
Influence of soil microorganisms on metal corrosion of underground pipelines 土壤微生物对地下管线金属腐蚀的影响
Koroze a ochrana materialu Pub Date : 2018-05-01 DOI: 10.1515/kom-2018-0009
M. Polutrenko, P. Maruschak, A. Tymoshenko, A. Sorochak
{"title":"Influence of soil microorganisms on metal corrosion of underground pipelines","authors":"M. Polutrenko, P. Maruschak, A. Tymoshenko, A. Sorochak","doi":"10.1515/kom-2018-0009","DOIUrl":"https://doi.org/10.1515/kom-2018-0009","url":null,"abstract":"Abstract There have been revealed and summarized the regularities in biocorrosion of steel 17G1S-U, which is traditionally used for manufacturing oil and gas mains. The basic regularities of biocorrosion processes in the 17G1S-U pipe steel under the influence of SRB Desulfovibrio Sp. strains Kyiv-10 was obtained by weight-loss testing and surface analysis techniques. Effective inhibitors are proposed, which allow protecting steel 17G1S-U against the development of anaerobic corrosion under the influence of sulfate-reducing bacteria (SRB). The effectiveness of inhibitors is estimated by the degree of their protective effect. The porous structure of the surface film contributes to the initiation of localized corrosion. Damage analysis of the specimen surface corroded under different test conditions was performed.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"65 - 70"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/kom-2018-0009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41369900","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: 9
Effect of combined surface treatment on quality and electrochemical corrosion properties of manganese phosphate on hsla steel domex 700 复合表面处理对磷酸锰对高强度低合金钢domex700质量及电化学腐蚀性能的影响
Koroze a ochrana materialu Pub Date : 2018-05-01 DOI: 10.1515/kom-2018-0008
K. Borko, F. Pastorek, Jacková M. Neslušan, S. Fintová, B. Hadzima
{"title":"Effect of combined surface treatment on quality and electrochemical corrosion properties of manganese phosphate on hsla steel domex 700","authors":"K. Borko, F. Pastorek, Jacková M. Neslušan, S. Fintová, B. Hadzima","doi":"10.1515/kom-2018-0008","DOIUrl":"https://doi.org/10.1515/kom-2018-0008","url":null,"abstract":"Abstract The actual industrial trend is focused on weight reduction of constructions while preserving strength properties. For this purpose, conventional steel are replaced by high strength steels.. The aim of this study was to evaluate the effects of mechanical surface pre-treatment on corrosion resistance of high strength low alloy steel Domex 700 before and after surface treatment by manganese phosphating. Tested environment was 0,1M NaCl solution. Evaluation of mechanical pre-treatment and phosphating effects on corrosion resistance was realized by electrochemical measurements: potentiodynamic polarization measurements (Tafel analysis) and electrochemical impedance spectroscopy (equivalent circuits). From resulsts it is possible to conclude, that creation of manganese phosphate layer on ground and shot peened steel surface significantly increases the corrosion resistance of Domex 700 steel.","PeriodicalId":17911,"journal":{"name":"Koroze a ochrana materialu","volume":"62 1","pages":"45 - 53"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48616664","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
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