Alkali-activated materialsScienceDirect
Dec 01 2018 · 1. Introduction. Alkali-activated binders have been widely discussed and promoted as a component of the current and future toolkit of sustainable cementing binder systems .These binders sometimes also named geopolymers can be generated from a wide range of aluminosilicate precursors with differing availability reactivity cost and value worldwide. The corrosion of superheater tube material in straw-fired boilers was investigated in the laboratory. Metal test elements of boiler tube steel (X20CRMV121 and AISI 347FG) were covered with synthetic (KCl and/or K2SO4) and real deposits and exposed to a synthetic flue gas (6 vol O2 12 vol CO2 400 ppmv HCl 60 ppmv SO2 balance N2) in 550 °C electrically heated ovens. Exposure times from
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Lab-Scale Investigations of High-Temperature Corrosion
The corrosion of superheater tube material in straw-fired boilers was investigated in the laboratory. Metal test elements of boiler tube steel (X20CRMV121 and AISI 347FG) were covered with synthetic (KCl and/or K2SO4) and real deposits and exposed to a synthetic flue gas (6 vol O2 12 vol CO2 400 ppmv HCl 60 ppmv SO2 balance N2) in 550 °C electrically heated ovens. Exposure times from Dec 01 2018 · 1. Introduction. Alkali-activated binders have been widely discussed and promoted as a component of the current and future toolkit of sustainable cementing binder systems .These binders sometimes also named geopolymers can be generated from a wide range of aluminosilicate precursors with differing availability reactivity cost and value worldwide.
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Simulation of the processes of corrosion-mechanical wear
Simulation of the processes of corrosion-mechanical wear of stainless steels in solutions of alkali and methods of increasing wear resistance Yu. L. Lokhvitskii 1 Soviet materials science a transl. of Fiziko-khimicheskaya mekhanika materialov / Academy of Sciences of the Ukrainian SSR volume 23 pages 270273 ( 1987 ) Cite this article Nov 01 2017 · Find out the corrosion mechanism and patterns through the analysis in flexural strength changing trend of alkali-resistant glass fiber in cement mortar. (2) Confirm the addition proportion of fly ash and silica fume into cement matrix that could effectively improve the corrosion resistance of alkali-resistant glass fiber for road concrete pavement.
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Full-scale experimental investigation Scientific Reports
Dec 13 2017 · Municipal solid waste (MSW) incineration is widely adopted as a waste management strategy and for the energy production. However this technology experience grave deposition and corrosion of the The corrosion and wetting behaviour of metals and steels with molten alkali carbonates is of particular interest for the design of molten carbonate fuel cells. Such cells operating at 650 °C with a lithium and potassium carbonate electrolyte offer a very corrosive medium for fuel cell components. Static corrosion tests under simulated anode conditions have shown that rhodium ruthenium
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Alkali–silica reactionWikipedia
The alkali–silica reaction (ASR) more commonly known as "concrete cancer" is a deleterious swelling reaction that occurs over time in concrete between the highly alkaline cement paste and the reactive amorphous (i.e. non-crystalline) silica found in many common aggregates given sufficient moisture.. This deleterious chemical reaction causes the expansion of the altered aggregate by the The presence of alkali chloride salts in deposits may cause accelerated corrosion well below the melting point of the salt. The corrosion can be severe in air but may be further enhanced by SO2 which may cause intra-deposit sulfation of the alkali chlorides liberating HCl or Cl2 gas close to the metal surface. In case the metal surface
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AlkaliWikipedia
In chemistry an alkali (/ ˈ æ l k əl aɪ / from Arabic القلوي al-qaly "ashes of the saltwort") is a basic ionic salt of an alkali metal or an alkaline earth metal.An alkali can also be defined as a base that dissolves in water.A solution of a soluble base has a pH greater than 7.0. The adjective alkaline is commonly and alkalescent less often used in English as a synonym for In allusion to facility corrosion problem in caustic soda industry five types of ni-Cr-cu alloy cast irons were developed. The corrosion rates of ni-Cr-cu alloy cast irons in hot concentrated alkali solution were measured by using self-made dynamic corrosion experiment equipment the microstructures and surface corrosion morphology of alloy cast irons were observed by means of the optical
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Alkali-activated protective coatings for reinforced
Jan 25 2021 · Corrosion resistance of alkali-activated binary reinforced concrete based on natural volcanic pozzolan exposed to chlorides Journal of Building Engineering 33 ( 2021 ) p. 101593 10.1016/j.jobe.2020.101593 Corrosion is a natural process that converts a refined metal into a more chemically stable form such as oxide hydroxide or sulfide is the gradual destruction of materials (usually a metal) by chemical and/or electrochemical reaction with their environment. Corrosion engineering is the field dedicated to controlling and preventing corrosion.. In the most common use of the word this means
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(PDF) Chloride transport and the resulting corrosion of
Chloride transport and the resulting corrosion of steel bars in alkali activated slag concretes. December 2015 Materials and Structures 49(9) DOI 10.1617/s. Authors Alkali Scientific. 5/5.0 (2 reviews) Average rating based on total average product review rating for all company products. Your Trusted Source For Research Products.
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Alkali Scientific SelectScience
Alkali Scientific. 5/5.0 (2 reviews) Average rating based on total average product review rating for all company products. Your Trusted Source For Research Products. Atomizdat Moscow (1977). Translated from Atomnaya Énergiya Vol. 45 No. 2 p. 167 August 1978.
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Alkali Metal Cation Effects in Structuring Pt Rh and Au
This includes the role of alkali metal cations which are thought to be crucial in both enabling cathodic corrosion and controlling its final facet preference. This work addresses this knowledge gap by exploring the cathodic corrosion of Pt Rh and Au in LiOH NaOH and KOH through both experimental and theoretical methods. This study aims to investigate the performance of alkali-activated slag concrete (AASC) and conventional concrete (CC) against sulphuric acid attack. From the preliminary investigations conducted on 18 trial mixes of AASC four AASC mixes (S–0.4–2.33–16M S–0.5–2.33–12M S–0.5–1.0–12M and S–0.5–2.33–16M) apart from CC mix are considered in this study. Concrete specimens
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The corrosion and wetting behaviour of metals and steels with molten alkali carbonates is of particular interest for the design of molten carbonate fuel cells. Such cells operating at 650 °C with a lithium and potassium carbonate electrolyte offer a very corrosive medium for fuel cell components. Static corrosion tests under simulated anode conditions have shown that rhodium ruthenium Jan 25 2021 · Corrosion resistance of alkali-activated binary reinforced concrete based on natural volcanic pozzolan exposed to chlorides Journal of Building Engineering 33 ( 2021 ) p. 101593 10.1016/j.jobe.2020.101593
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Methods of road surface durability improvementScienceDirect
Jan 01 2018 · Based on alkali activated slag binders concretes with compression strength up to 140 MPa frost resistance up to F1300 high corrosion resistance in sulfate media crack resistance increased durability at dynamic loadings can be obtained (Petrova et al. 2017 Neupane et al. 2018 Oh et al. 2010). 588 Tatiana Petrova et al. / Transportation dependent on the ceramic alkali corrosion resistance. Alkali corro-sion of Si. 3. N. 4. is a problem that needs to be addressed and dimin-ished for high temperature structural applications of this
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Corrosion of refractories by glass melts with a high
Immediate online access to all issues from 2019. Subscription will auto renew annually. New Materials and Corrosion Control Published January 1976 Corrosion resistance of nickel and nickel weldments in fused alkali. N. I. Kamakin A. A. Sychev I. N. Medrish V. R. Savochkin T. V. Babenko Chemical and Petroleum Engineering volume 12 pages 5255 (1976)Cite this article
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Chlor-alkali IndustryChemChina
Chlor-alkali Industry is a monthly journal with much influence in the national chlor-alkali sector. It was founded in 1965 and published at home and abroad. It has posted full texts on the China Journal Net and China Academic Journal (CD versions). It is a source journal of the Chinese Academic Journal Comprehensive Evaluation Database and Ca0.6Mg0.4Zr4(PO4)6 coating was used as environmental barrier coatings (EBC) to improve the alkali corrosion resistance of SiC ceramic at high temperature. A new sol-gel based process has been developed for preparing high quality and thick C0.6M0.4ZP coating on SiC ceramic with once deposition. The prepared C0.6M0.4ZP coating on SiC ceramic is homogeneous and dense and shows a
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AluminiumWikipedia
Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals at approximately one third that of steel has a great affinity towards oxygen and forms a protective layer of oxide on the surface when exposed to air. Aluminium visually resembles silver both in its color and Actually the nature of alkali metal cations not only affects cathodic corrosion but also various electrochemical processes 58• . In summary these trends reveal that cathodic corrosion is extremely affected by the nature and concentration of the cations.
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Lab-Scale Investigations of High-Temperature Corrosion
The corrosion of superheater tube material in straw-fired boilers was investigated in the laboratory. Metal test elements of boiler tube steel (X20CRMV121 and AISI 347FG) were covered with synthetic (KCl and/or K2SO4) and real deposits and exposed to a synthetic flue gas (6 vol O2 12 vol CO2 400 ppmv HCl 60 ppmv SO2 balance N2) in 550 °C electrically heated ovens. Exposure times from New Materials and Corrosion Control Published January 1976 Corrosion resistance of nickel and nickel weldments in fused alkali. N. I. Kamakin A. A. Sychev I. N. Medrish V. R. Savochkin T. V. Babenko Chemical and Petroleum Engineering volume 12 pages 5255 (1976)Cite this article
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effect of pH level on corrosion rateSlideShare
Jan 12 2013 · 11. AKINPELUMI K.F CONCLUSIONThe corrosion rate of Copper metal in a high pH level solution of 11 is the same as in a -6low pH level solution of 3 and has a value of 5.556 10 g/s.Also in a completely neutral solution of pH 7 no corrosion occurs in the copper metalafter 1 hour (3600s).The corrosion rate of Aluminum is found to vary Apr 28 2015 · 3. There are 3 theories of corrosion Acid theory of corrosion. Dry or chemical theory of corrosion. Galvanic or Electrochemical or Wet theory of corrosion. 4. Acid theory of corrosion Acid theory suggests that corrosion of a metal (iron) is due to the presence of acids around it. According to this theory iron is corroded by atmospheric carbon
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Alkali-activated materialsScienceDirect
Dec 01 2018 · 1. Introduction. Alkali-activated binders have been widely discussed and promoted as a component of the current and future toolkit of sustainable cementing binder systems .These binders sometimes also named geopolymers can be generated from a wide range of aluminosilicate precursors with differing availability reactivity cost and value worldwide. When nitrates of alkali and alkali-earth metals are introduced into an aggressive environment the change in the reinforcing bars mass made of St3 steel occurs 7-8 times slower. Increasing the concentration to 1 and 1.5 is shown to be impractical due to the small difference in the effect on the reinforcing steel anodic dissolution.
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