Practice of Anticorrosive Protection最新文献_第5页

Evaluation of the effectiveness and strength characteristics of Scotchkote® 2400 pipe coating Scotchkote®2400管道涂层的有效性和强度特性评估

Practice of Anticorrosive Protection Pub Date : 2020-09-20 DOI: 10.31615/j.corros.prot.2020.97.3-1

{"title":"Evaluation of the effectiveness and strength characteristics of Scotchkote® 2400 pipe coating","authors":"","doi":"10.31615/j.corros.prot.2020.97.3-1","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2020.97.3-1","url":null,"abstract":"The article is concerned with the current problem of restoring the required performance of water pipelines of public water supply systems. The effectiveness of using trenchless pipe rehabilitation technologies is noted. The article analyzes the results of the experiments for determining the strength characteristics of Scotchkote® 2400 protective corrosion resistant coating of pipes that were carried out in the laboratory of the Water Supply and Sanitation Department of the Moscow State University of Civil Engineering with Instron 3345 electromechanical tensile testing machine. The effectiveness of Scotchkote® 2400 protective coating relative to restoring and improving the strength and hydraulic characteristics of worn water pipelines was shown. The author comes to the conclusion that Scotchkote®2400 protective coating is a substantial alternative to cement-sand and other internal coatings, since in many respects it surpasses them owing to the ability of colmatage sealing of large diameter holes; high wear resistance; smooth surface; ability to endure high hydraulic pressures. The coating does not overlap service connections and slightly reduces the diameter of the restored pipelines. Based on the studies, comparative characteristics of Scotchkote® 2400 protective coating spraying technology with the basic methods of trenchless pipeline reconstruction are presented. Mathematical processing of the results of experimental studies of the physicomechanical characteristics of Scotchkote® 2400 coating is given. As a result of the studies, the calculated values of the protective coating thicknesses for partially worn and completely worn out pipelines are obtained and recommended.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84663326","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

Investigation of the accumulation of alloying elements (Mn, Ni, Mo) on the surface of high-alloy steel in acid medium 高合金钢在酸性介质中表面合金元素(Mn, Ni, Mo)积累的研究

Practice of Anticorrosive Protection Pub Date : 2020-09-20 DOI: 10.31615/j.corros.prot.2020.97.3-5

{"title":"Investigation of the accumulation of alloying elements (Mn, Ni, Mo) on the surface of high-alloy steel in acid medium","authors":"","doi":"10.31615/j.corros.prot.2020.97.3-5","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2020.97.3-5","url":null,"abstract":"The formation of corrosion products in the surface layers of steel 15KH12VNMF brand was investigated in solutions of hydrochloric, sulfuric, phosphoric, and nitric acids. Comparative data were obtained on the accumulation of impurity alloying elements in surface layers of high-alloy steel 15KH12VNMF brand. The content of alloying elements was defined in the surface layer of steel and corrosion products when holding samples in solutions with a certain concentration for 1 hour. The obtained data indicate that the accumulation of manganese, molybdenum and nickel in the surface layer does not occur in the sulfuric acid solution. The surface layers in the solution of phosphoric acid accumulate intensively alloying impurities, whereas in nitric and hydrochloric acids there is a selective accumulation. The surface films on the steel 15KH12VNMF brand in solutions of hydrochloric, sulfuric, phosphoric, nitric acids were Identified at high concentrations and times of incubation. It was established that the rate of manganese accumulation in hydrochloric acid is constant, regardless of the acid concentration. For nickel and molybdenum, the rate of accumulation increases at initial concentrations, and tends to its constant value at high concentrations. In sulfuric acid solutions, the amount of manganese on the surface depends not only on the concentration, but also on the holding time. The accumulation of nickel and molybdenum on the surface of the plate depends as on the concentration and the time. It was determined that in solutions of phosphoric acid the accumulation of manganese occurs only at the primary time, in the future remains constant. The accumulation of nickel and molybdenum on the surface depends as on the concentration and the time and has a similar character. The data are obtained that the accumulation of manganese, nickel, molybdenum on the surface of the sample in solutions of nitric acid with increasing concentration occurs regardless of the holding time of the sample.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89698879","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

Bactericidal properties of a combined corrosion inhibitor in the presence of SRB 复合缓蚀剂在SRB存在下的杀菌性能

Practice of Anticorrosive Protection Pub Date : 2020-09-20 DOI: 10.31615/j.corros.prot.2020.97.3-3

引用次数: 0

New software for corrosion research based on IPC series potentiostats 基于IPC系列电位器的腐蚀研究新软件

Practice of Anticorrosive Protection Pub Date : 2020-09-20 DOI: 10.31615/j.corros.prot.2020.97.3-6

{"title":"New software for corrosion research based on IPC series potentiostats","authors":"","doi":"10.31615/j.corros.prot.2020.97.3-6","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2020.97.3-6","url":null,"abstract":"The developed IPC-CorrMeter software is intended for studying corrosion of metals, alloys, and coatings and estimating the efficiency of anti-corrosion protection by emulating the operation of a “Corrosimeter” device in potentiostats of the IPC series that allows implementing well-known and reliable corrosion-electrochemical methods, such as linear polarization resistance, zero resistance amperometry, and potentiometry in the existing serial IPC potentiostats. The advantages of the new software include: a possibility of continuous automatic use of these methods in the study of corrosion processes, obtaining results almost in real time mode, high sensitivity and a wide adjustable range of measurements of the rates of general and pitting corrosion (from 1 nm to tens of mm per year), no absence of any restrictions regarding the RAM size of the device. Quantitative dependences of the general and pitting corrosion rate of steel St3 in water are obtained in the presence of the industrial СARTEС-28B corrosion inhibitor for hydraulic testing of mud pumps. They confirm the reliability, accuracy, high sensitivity, and validity of the IPC-CorrMeter software and equipment for researching metal corrosion and allow evaluating the efficiency of anti-corrosion protection agents, as well as the high efficiency of this inhibitor.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76263829","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

Surface modification of ferrosilide alloys for anode earthing 阳极接地用硅铁合金的表面改性

Practice of Anticorrosive Protection Pub Date : 2020-09-20 DOI: 10.31615/j.corros.prot.2020.97.3-4

{"title":"Surface modification of ferrosilide alloys for anode earthing","authors":"","doi":"10.31615/j.corros.prot.2020.97.3-4","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2020.97.3-4","url":null,"abstract":"It is known that the disadvantages of ferrosilide earthing devices are their fragility, which leads to their frequent mechanical damage. Their fragility is increased with increasing silicon content. The solution to this problem is to reduce the content of silicon in the alloy, but this greatly increases the rate of dissolution of the resulting alloy. As a result, the possibility of reducing the dissolution rate of ferrosilides with a silicon content of 9…12% due to thermal oxidation and treatment in a phosphoric acid medium was studied. The most promising method for anode grounding conductors is the method of processing materials in orthophosphoric and metaphosphoric acids with the formation on the surface of a phase of iron silicide highly resistant to anodic dissolution due to selective etching of the alloy. The relationship between the phase composition of the films showed that mainly phases of silicon oxide (SiO2) and magnetite (Fe3O4) predominate in the alloys, as a result of which the dissolution rate is significantly reduced. As a result of heat treatment of ferrosilide alloys with a silicon content of less than 14%, a decrease in the dissolution rate does not occur due to the high porosity of the formed films and the presence of phases that do not have protective properties. The anodic dissolution rate is the lower, when the grain size of the alloy used is the larger.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83509875","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

Research universal combined inhibitor for the oil and gas industry 研究油气行业通用复合抑制剂

Practice of Anticorrosive Protection Pub Date : 2020-06-01 DOI: 10.31615/j.corros.prot.2020.96.2-4

M. B. Adigezalova

引用次数: 0

Models and functioning «alive geofilters» based on the geoecological framework 基于地质生态框架的模型和功能“活地质过滤器”

Practice of Anticorrosive Protection Pub Date : 2020-06-01 DOI: 10.31615/j.corros.prot.2020.96.2-5

D. Markelov, N. Mineeva, A. P. Akol´zin, B. Kochurov, M. Grigorieva, E. A. Chukmasova

引用次数: 0

The complexes of synthetic and petroleum acids N-derivatives as steel acidic corrosion inhibitors 合成的配合物与石油酸n衍生物作为钢的酸性缓蚀剂

Practice of Anticorrosive Protection Pub Date : 2020-06-01 DOI: 10.31615/j.corros.prot.2020.96.2-2

L. I. Aliyeva, L. M. Efendiyeva, V. Abbasov, G. Rustamli, S. Akhmedbekova

{"title":"The complexes of synthetic and petroleum acids N-derivatives as steel acidic corrosion inhibitors","authors":"L. I. Aliyeva, L. M. Efendiyeva, V. Abbasov, G. Rustamli, S. Akhmedbekova","doi":"10.31615/j.corros.prot.2020.96.2-2","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2020.96.2-2","url":null,"abstract":"Oxy- and petroleum acids were synthesized by liquid-phase oxidation of naphthen-paraffin concentrate, separated from diesel fraction of Azerbaijani oils mixture with atmospheric oxygen in the presence of heterogeneous catalytic systems. As the catalyst aluminum nano-oxide modified by Cr ,Co, Mn transition metals was used. The oxidation was carried out in reactor of bubble type in the interval of temperature 135…140 ºС during 5 h. Their imidazoline derivatives were obtained by the use of the synthesized acids and polyamines, and the complexes were prepared on the basis of them and aliphatic monobasic acids (formic and acetic) at equal molar ratio. Their influence was studied on the kinetics of the corrosion process of C1018 steel samples in 1% solution of NaCl, saturated by CO2 at 50 °С. The complexes were tested as inhibitors of carbon dioxide corrosion at concentration of 25 and 50 ppm in 20 h. According to obtained data, the usage of different concentrations of complexes decreases corrosion rate and metal loss (up to 9…10 times). The values of surface coverage (θ) and the extent of inhibition efficiency (IE, %) of corrosion process of steel example in CO2-medium in presence of prepared complexes were calculated. IR spectra of surface layer of used electrodes were recorded before and after adding prepared complexes into corrosion medium. As a result of the studies it was determined, that the obtained complexes had high prospects for use (protection degree 97…98%) as CO2-corrosion inhibitors in suppressing of carbon dioxide corrosion of steel equipment.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82360686","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

Determination of the priority of withdrawal to repair of equipment of anti-corrosive protection on the section of the gas pipeline in the conditions of restriction of financing 确定在资金限制条件下，对某段燃气管道进行防腐保护设备维修的退出优先级

Practice of Anticorrosive Protection Pub Date : 2020-06-01 DOI: 10.31615/j.corros.prot.2020.96.2-1

S. Sabanov, S. Nikulin, E. L. Karnavskiy

{"title":"Determination of the priority of withdrawal to repair of equipment of anti-corrosive protection on the section of the gas pipeline in the conditions of restriction of financing","authors":"S. Sabanov, S. Nikulin, E. L. Karnavskiy","doi":"10.31615/j.corros.prot.2020.96.2-1","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2020.96.2-1","url":null,"abstract":"Based on the experience of the operating organizations and results of previous studies, it is determined, that the more rational criterion for the withdrawal in the repair of insulation coating on the section of the pipeline is the reserve of the current from the nominal value, and the criterion of withdrawal in the repair of anode grounding is a reserve of voltage from the nominal value. It has been revealed that with data on changes in the output parameters of the cathode protection station and protection potential at the control point for a certain period, it is possible to predict the change in the factor of influence of the station at this point for a certain period and, therefore, to predict changes in the modes of operation of this station and the technical condition of the anti-corrosion protection system at the specified required range of maintenance level of protective potential. Based on the above conclusions, algorithms have been developed to assess the residual resource of the anti-corrosion protection system on the gas pipeline site and make management decisions on its extension based on the received values in the conditions funding restrictions. Also, an algorithm has been developed to determine the residual resource of the anti-corrosion protection system with the most effective redistribution of parameters between the cathode protection stations and an algorithm that allows to determine the priority of output in the repair of the system elements.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"116 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87717964","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

Electrodeposition of Ni-W-P alloy Ni-W-P合金的电沉积

Practice of Anticorrosive Protection Pub Date : 2020-03-01 DOI: 10.31615/j.corros.prot.2020.95.1-7

S. S. Adilova, Andrey B. Drovosekov, A. Aliev, A. Shiryaev

{"title":"Electrodeposition of Ni-W-P alloy","authors":"S. S. Adilova, Andrey B. Drovosekov, A. Aliev, A. Shiryaev","doi":"10.31615/j.corros.prot.2020.95.1-7","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2020.95.1-7","url":null,"abstract":"Influence of sodium hypophosphite admixture to electrolyte for deposition of Ni-W alloy on the coating composition, morphology, structure and microhardness is investigated. Antisymbatic dependence of tungsten and phosphorus content in Ni-W and Ni-W-P alloys on the sodium hypophosphite concentration in the electrolyte is observed, namely, at higher sodium hypophosphite concentration in the electrolyte solution the coatings are become poorer in tungsten whereas phosphorus content is increased. Phosphorus incorporation into the alloy leads to globular morphology of the surface of coatings. The minimal roughness was obtained at high hypophosphite concentrations in the electrolyte (7.5 and 10 g/L). As-deposited Ni-W and Ni-W-P alloys possess nanocrystalline structure manifested in broad X-ray diffraction peaks. Addition of 2.5…5 g/L of hypophosphite markedly weakens Ni reflections (200) and (220), the (111) peaks becomes broader. In addition, a Ni3P phase is appeared in the coatings. Thermal treatment in vacuum at 400 °С induces growth of nickel crystallites. Microhardness of as-deposited coatings is weakly dependent on sodium hypophosphite concentration in the electrolyte and is in the range 3.8…4.2 GPa. Thermal treatment of Ni-W-P alloys at 400 °С during 1 h increases microhardness up to 5.9…8.8 GPa.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"137 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77941231","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