Practice of Anticorrosive Protection最新文献

COMPUTATIONAL MODELING OF EROSION WEAR OF THE FISHER V500 CONTROL VALVE OF THE SLURRY SUPPLY LINE OF THE CATALYTIC CRACKING FACILITY OF OIL RESIDUES 渣油催化裂化装置浆液供给管线fisher v500控制阀冲蚀磨损计算建模

Practice of Anticorrosive Protection Pub Date : 2022-12-01 DOI: 10.31615/j.corros.prot.2022.106.4-5

{"title":"COMPUTATIONAL MODELING OF EROSION WEAR OF THE FISHER V500 CONTROL VALVE OF THE SLURRY SUPPLY LINE OF THE CATALYTIC CRACKING FACILITY OF OIL RESIDUES","authors":"","doi":"10.31615/j.corros.prot.2022.106.4-5","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2022.106.4-5","url":null,"abstract":"Erosion of the internal surfaces of pipelines and shut-off valves used in oil production is a very dangerous phenomenon. It occurs as a result of the impact on the metal of mechanical impurities contained in the working environment. Erosion often occurs together with corrosion. The type of destruction under the influence of mechanical impurities is determined by the fluid flow rate, and the intensity and rate of erosion depends on the concentration and composition of mechanical impurities. Solving the problem of effectively determining the degree of adverse environmental impact depending on various parameters requires the development of new approaches, such as modeling. Modeling of hydrodynamics to determine critical flow rates and calculation of expected zones and erosion rates is due to the importance of solving the problem of anti-erosion protection. In this paper, CFD modeling of hydrodynamics and erosive wear of the control valve of the suspension line of the catalytic cracking unit is performed in the ANSYS Fluent software package. The flow velocities are calculated, and the areas affected by critical velocities at which corrosion erosion occurs are also shown. The effect of density and content of mechanical impurities on the erosion rate is shown.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83546639","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

ON THE DECISIVE ROLE OF BIOFILMS OF MICROORGANISMS IN THE INITIATION AND DEVELOPMENT OF MICROBIOLOGICAL CORROSION OF METALS (PART 1) 微生物生物膜在金属微生物腐蚀的发生和发展中的决定性作用(上)

Practice of Anticorrosive Protection Pub Date : 2022-12-01 DOI: 10.31615/j.corros.prot.2022.106.4-6

{"title":"ON THE DECISIVE ROLE OF BIOFILMS OF MICROORGANISMS IN THE INITIATION AND DEVELOPMENT OF MICROBIOLOGICAL CORROSION OF METALS (PART 1)","authors":"","doi":"10.31615/j.corros.prot.2022.106.4-6","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2022.106.4-6","url":null,"abstract":"The reliability of technical products is determined by their resistance to the influence of the external environment, the natural component of which are destructor microorganisms (bacteria, yeast, microscopic fungi, etc.). The low efficiency of protecting metals from biocorrosion is largely due to insufficient knowledge of all aspects of the damaging effects of microorganisms. There are no quantitative data on the processes of biodamage of equipment elements in real operating conditions. To date, reliable methods for diagnosing and predicting the durability of metals and their structures under conditions of interaction with wildlife have not been developed. In this work, an attempt was made to explain the role of biofilms of microscopic fungi as the important factor in the mycological corrosion of metals. The formation and accumulation of a corrosive medium is possible as a result of the metabolic processes of microscopic fungi that form a biofilm. A detailed determination of the mechanism of biocorrosion of metals is a complex scientific problem. The purpose of this article is to analyze experimental data on the study of aerobic biocorrosion of metals mediated by the metabolic activity of biofilms of bacteria and microscopic fungi.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77627238","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

CORROSIVITY OF THE TROPICAL ATMOSPHERE OF SOUTH VIETNAM 越南南部热带大气的腐蚀性

Practice of Anticorrosive Protection Pub Date : 2022-12-01 DOI: 10.31615/j.corros.prot.2022.106.4-1

引用次数: 0

PROTECTIVE EFFICACY OF OMEPRAZOLE AGAINST HYDROGEN SULFIDE CORROSION OF CARBON STEEL 奥美拉唑对碳钢硫化氢腐蚀的防护效果

Practice of Anticorrosive Protection Pub Date : 2022-12-01 DOI: 10.31615/j.corros.prot.2022.106.4-4

引用次数: 0

IMPROVING THE OPERATIONAL AND ANTICORROSIVE PROPERTIES OF THE FILM-FORMING BASE OF PRIMERS FOR FIRE-RETARDANT COATINGS 提高防火涂料底漆成膜基的操作性能和防腐性能

Practice of Anticorrosive Protection Pub Date : 2022-12-01 DOI: 10.31615/j.corros.prot.2022.106.4-2

{"title":"IMPROVING THE OPERATIONAL AND ANTICORROSIVE PROPERTIES OF THE FILM-FORMING BASE OF PRIMERS FOR FIRE-RETARDANT COATINGS","authors":"","doi":"10.31615/j.corros.prot.2022.106.4-2","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2022.106.4-2","url":null,"abstract":"The composition and structure of flame-retardant coatings do not provide the required adhesive and protective anticorrosive properties, and therefore it is necessary to use special primers to eliminate these shortcomings. According to the purpose, the primers used for these purposes should have a sufficiently high temperature resistance. The highest resistance to high temperatures, of which polyorganosiloxane oligomers have found application in the field of paint coatings, characterizes Organosilicon polymers. However, coatings based on them, formed without thermal stimulation, are characterized by fragility, unsatisfactory adhesive and barrier properties and, as a result, low anticorrosive efficiency. In order to ensure the chemical structuring of polyorganosiloxane oligomers during the formation of coatings without exposure to elevated temperatures, functional additives were synthesized, which are products of the addition of 3-aminopropyltriethoxysilane to polyesters with terminal epoxy groups of various functionality and structure. The effect of the obtained adducts on the anticorrosive properties and operational characteristics of polyorganosiloxane coatings investigated. The data obtained as a result of the study made it possible to conclude that the branched structure of the hardener contributes to the improvement of the anticorrosive and other operational properties of polyorganosiloxane coatings, and an increase in the distance between the crosslinking nodes increases the level of their chemical structuring. The analysis of the obtained data made it possible to choose the optimal composition and content of the functional additive ensuring the achievement of maximum anticorrosive effectiveness of coatings in combination with high adhesive and physico-mechanical properties without a noticeable loss of their heat resistance.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80228856","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

SALT DEPOSITION AND CORROSION INHIBITORS BASED ON ORGANOPHOSPHONATES 基于有机膦酸盐的盐沉积和缓蚀剂

Practice of Anticorrosive Protection Pub Date : 2022-12-01 DOI: 10.31615/j.corros.prot.2022.106.4-3

{"title":"SALT DEPOSITION AND CORROSION INHIBITORS BASED ON ORGANOPHOSPHONATES","authors":"","doi":"10.31615/j.corros.prot.2022.106.4-3","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2022.106.4-3","url":null,"abstract":"The work is devoted to the creation of multi-purpose compounds based on organ-ophosphonates (OF) for simultaneous inhibition of salt deposition and corrosion in water use systems. A comparative analysis of the effectiveness of salt deposition and corrosion inhibitors based on OP of various chemical composition and structure and their complexates with zinc and magnesium was carried out. It was found that with an increase in the number of functional groups in the reagent molecule and an increase in the length of the hydrocarbon radical connecting the aminomethylene-phosphone groups, an increase in the kinetic param-eters of nucleation and, accordingly, their efficiency is observed. Zinc and magnesium com-plexonates obtained at a molar ratio of 2.5:1 (OF:Me) were tested as salt deposition and cor-rosion inhibitors. It is established that magnesium complexonates are not inferior to zinc ones. The decrease in the corrosion is due to the formation of a protective film on the metal surface. The formation of a protective film is confirmed by the results of ellipsometric studies (spectral LED ellipsometer SPEL-7LED) and the results of elemental analysis (atomic emission spectrometer with inductively coupled plasma iCAP 6300 Duo).","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73781131","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

STUDY OF AMINOESTERS OF SYNTHETIC PETROLEUM ACID PRODUCED BY AEROBIC OXIDATION OF NAPHTHEN-PARAFFIN HYDROCARBONS, AS CORROSION INHIBITORS 石蜡烃好氧氧化合成石油酸氨基酯缓蚀剂的研究

Practice of Anticorrosive Protection Pub Date : 2022-09-01 DOI: 10.31615/j.corros.prot.2022.105.3-3

{"title":"STUDY OF AMINOESTERS OF SYNTHETIC PETROLEUM ACID PRODUCED BY AEROBIC OXIDATION OF NAPHTHEN-PARAFFIN HYDROCARBONS, AS CORROSION INHIBITORS","authors":"","doi":"10.31615/j.corros.prot.2022.105.3-3","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2022.105.3-3","url":null,"abstract":"This article presents the results of research in the field of synthesis of amino esters obtained on the basis of mono, di, triethanolamine and synthetic petroleum acid in a molar ratio of 1:1.The structure and structure of the obtained substances were confirmed by IR spectroscopy. The inhibitor-bactericidal effect of amino esterson the corrosion process has been studied. The inhibitory effect of the synthesized amino esters on CO2 steel corrosion at concentrations of 25, 50, and 100 mg/L was studied. Samples T-1, T-2, T-3 at a concentration of 25 mg/l for 20 hours showed an inhibitory effect of 40,36…74,15%, respectively, at a concentration of 50 mg/l, respectively 79,96…92,04 %, at a concentration of 100 mg/l, respectively, 98,09…99,59%. In order to study the antimicrobial activity of the obtained amino esters, their solutions were prepared in various media (isopropyl alcohol 60%) at five different concentrations (5; 50; 500; 600; 700 mg/l) and their effect on the vital activity of sulfate-reducing bacteria (SRB) was studied at 30…32 °C for 15 days. It has been established that at a concentration of 600 mg/l, the synthesized amino esters exhibit a 95,2…100% bactericidal effect, and at a concentration of 700 mg/l, they exhibit a 100% bactericidal effect, completely suppressing the vital activity of bacteria. The synthesized complexes exhibit a higher bactericidal effect even at low concentrations. Thus, the bactericidal and CO2-corrosion-inhibiting properties of amino esters synthesized on the basis of synthetic petroleum acid obtained in the process of aerobic oxidation of paraffin-naphthenic hydrocarbons isolated from the diesel fraction (boiling range 190…330 °C) in the presence of transition-metal-modified nanosized γ-Al2O3 catalyst, and ethanolamines.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88386188","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 CORROSION BEHAVIOR OF ALUMINIUM 1980T1 IN SEAWATER AND DRILLING MUD BY ELECTROCHEMICAL METHODS 用电化学方法研究铝800t1在海水和钻井泥浆中的腐蚀行为

Practice of Anticorrosive Protection Pub Date : 2022-09-01 DOI: 10.31615/j.corros.prot.2022.105.3-1

{"title":"INVESTIGATION OF THE CORROSION BEHAVIOR OF ALUMINIUM 1980T1 IN SEAWATER AND DRILLING MUD BY ELECTROCHEMICAL METHODS","authors":"","doi":"10.31615/j.corros.prot.2022.105.3-1","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2022.105.3-1","url":null,"abstract":"The main methods of corrosion protection of equipment and metal structures of offshore drilling platforms are considered. The corrosion resistance of the high-strength 1980T1 aluminium alloy used for the manufacture of the riser in seawater and drilling mud, the effectiveness of its protection with zinc-rich coatings using the methods of polarization resistance, potentiometry, as well as appearance assessment studied. In seawater at 20 and 40 °C, alloy 1980T1 refers to resistant materials - 3-4 (6 grade according to GOST 5272- 90), intense pitting formation is observed, in drilling mud the corrosion rate (Km) increases more than 10 times refer to seawater (low-resistance, 6 grade), which is due to the alkaline nature of the medium. There is intense continuous corrosion, large pitting, ulcers on the seam and its border. In seawater at 20 °C, the Km of aluminium and coatings are comparable. In the drilling mud at 20 °C, the coatings provide a 2,5…4-time reduction in Km. After 30 days of exposure in seawater and drilling mud at 20 °C, the zinc-polyurethane coating detached to40…70%, intense pitting of base observed. Bubbles all over the surface of zinc-epoxy coating observed. Zinc-silicate and zinc-polyurethanalkyde coating with a high concentration of zinc had only small delamination in the weld area. In seawater at 20…40 °С and drilling mud at 20 °C zinc-silicate coating has the greatest tread capacity, the zinc-polyurethane, zinc-polyurethanalkyde and zinc-epoxy coatings are insignificant. Additional protection of welds and pipe surfaces in seawater achieved using insulated, metallized, protective coatings and cathode protection, in drilling mud it is also necessary to study the possibility of pH reduction and the use of effective corrosion inhibitors.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"99 8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87724454","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

EVALUATION OF THE INFLUENCE OF VARIOUS FACTORS ON THE CORROSION OF STEELS DURING MOISTURE CONDENSATION UNDER THE CONDITIONS OF TRANSPORTATION OF A CORROSIVE GAS 评价在输送腐蚀性气体的条件下，各种因素对凝结过程中钢的腐蚀的影响

Practice of Anticorrosive Protection Pub Date : 2022-09-01 DOI: 10.31615/j.corros.prot.2022.105.3-2

{"title":"EVALUATION OF THE INFLUENCE OF VARIOUS FACTORS ON THE CORROSION OF STEELS DURING MOISTURE CONDENSATION UNDER THE CONDITIONS OF TRANSPORTATION OF A CORROSIVE GAS","authors":"","doi":"10.31615/j.corros.prot.2022.105.3-2","DOIUrl":"https://doi.org/10.31615/j.corros.prot.2022.105.3-2","url":null,"abstract":"The problem of internal corrosion is an urgent problem in the transportation of produced products with the presence of corrosive-aggressive components through gas pipelines. The presence of CO2 or H2S in the produced gas in combination with the presence of condensation water, as well as a number of other factors, stimulates the intensive development of carbon dioxide or hydrogen sulfide corrosion of a local nature. To determine the limiting rates of local corrosion, corrosion tests were performed under conditions of moisture condensation, which occurs when a temperature gradient occurs and the transported gas is rapidly cooled. A study was carried out to assess the influence of the main operational factors on corrosion processes during moisture condensation on the inner surface of the gas pipeline: humidity, temperature, type of steel, the presence of a weld and the presence of alcohol, monoethylene glycol and acidic environments. It has been established that many of the above corrosion parameters accelerate local corrosion of carbon and low alloy steels, thedevelopment rate of which reaches up to several mm/year. It has been determined that the rate of development of corrosion processes during the condensation of water-glycol and water-alcohol solutions depends on the amount and composition of the liquid condensing on the metal surface. High-alloy steel 12X18H10T (with 18% Cr) showed resistance to corrosion conditions during moisture condensation.","PeriodicalId":20323,"journal":{"name":"Practice of Anticorrosive Protection","volume":"2016 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86630647","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

FUEL AND ENERGY COMPLEX CERTIFICATION SYSTEM «TEKSERT» TSNIIKS 燃料和能源综合认证系统«teksert»tnik

Practice of Anticorrosive Protection Pub Date : 2022-06-01 DOI: 10.31615/j.corros.prot.2022.104.2-5

引用次数: 0