Corrosion resistance of titanium-molybdenum-tantalum alloys in sulfuric acid solutions of various concentrations at 20�

1974 ◽  
Vol 8 (2) ◽  
pp. 110-114
Author(s):  
N. M. Shmakov ◽  
V. S. Mikheev ◽  
L. I. Lishcheta ◽  
R. F. Sabynina ◽  
E. G. Turyanskaya
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Acid Solutions ◽  
Sulfuric Acid Solutions

scholarly journals Sulfuric acid corrosion of geopolymer concrete with mineral additives from wastes

2019 ◽  
Vol 6 (3) ◽  
Author(s):  
Nadezhda Eroshkina ◽  
Mikhail Chamurliev ◽  
Mark Korovkin
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Portland Cement ◽  
Geopolymer Concrete ◽  
Acid Solutions ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Demolition Waste ◽  
Sulfuric Acid Solutions ◽  
Mineral Additives

The effect of mineral additives such as crushed ash and individual building demolition waste on the corrosion resistance of geopolymer concrete based on screening the crushed granite and blast furnace slag in an environment of sulfuric acid solutions was studied. The corrosion resistance of concrete was evaluated by the kinetics of reducing the mass and strength of samples in sulfuric acid solutions with a concentration of 2,5 and 5 % for 10 days. It was shown that replacing 50 % of granite powder with ground crushed bricks or ash significantly increases the corrosion resistance of geopolymer materials. It was established that due to the formation of poorly soluble products of the interaction of sulfuric acid and concrete in the pores of a geopolymer stone, an interface is formed between the undestructed material and the zone subjected to destructive processes, which impedes the penetration of the corrosive medium into the material. The study also conducted comparative studies of the corrosion resistance of Portland cement concrete with various water-cement ratios. The research results showed that under the influence of sulfuric acid in Portland cement concrete this border does not form and a rapid loss of mass and strength occurs in the samples. The established feature of the process of destruction of geopolymer concrete in a solution of sulfuric acid is the reason for its higher resistance in comparison with cement concrete.

scholarly journals Corrosion resistance of fly ash-based geopolymer in hydrochloric and sulfuric acid solutions

Cerâmica ◽  
2020 ◽  
Vol 66 (380) ◽  
pp. 394-403
Author(s):  
L. F. T. Domingos ◽  
A. G. S. Azevedo ◽  
C. T. Lombardi ◽  
K. Strecker
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Fly Ash ◽  
Co2 Emission ◽  
Raw Material ◽  
Inorganic Polymers ◽  
Acid Solutions ◽  
Average Loss ◽  
Sulfuric Acid Solutions ◽  
Microstructure Of The Material

Abstract Currently, there is a growing interest in the use of industrial waste as a raw material in obtaining and developing new products in order to meet technological and environmental demands. Fly ash, for example, when in contact with an alkaline medium, forms inorganic polymers or geopolymers, which have properties comparable to ordinary Portland cement (OPC), but are capable of reducing up to 95% of CO2 emission into the atmosphere. In this study, the corrosion resistance of a geopolymer produced by the alkaline activation of fly ash type F was evaluated in 3%, 6%, and 9% hydrochloric and sulfuric acid solutions for up to 28 days. The materials showed an average loss in terms of compressive strength of approximately 29,8% and 39,5% after 28 days of immersion in HCl and H2SO4, respectively. The immersion in HCl showed divergent results due to the formation of NaCl crystals around the microstructure of the material.

scholarly journals Effect of Sn for Ferritic Stainless Steels on Corrosion Resistance in Sulfuric Acid Solutions

2017 ◽  
Vol 66 (11) ◽  
pp. 361-368
Author(s):  
Nobuhiko Hiraide ◽  
Hiroyuki Matsuyama ◽  
Toru Matsuhashi ◽  
Haruhiko Kajimura ◽  
Nobuyoshi Hara
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Stainless Steels ◽  
Acid Solutions ◽  
Ferritic Stainless Steels ◽  
Sulfuric Acid Solutions

Corrosion resistance of titanium alloy AT3 in dilute sulfuric acid solutions

1986 ◽  
Vol 21 (6) ◽  
pp. 591-592 ◽  
Author(s):  
V. E. Blashchuk ◽  
L. I. Onoprienko ◽  
M. V. Chervonyi
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Sulfuric Acid ◽  
Acid Solutions ◽  
Dilute Sulfuric Acid ◽  
Sulfuric Acid Solutions

Corrosion and Corrosion Inhibition of Aluminum Alloys A5052 and A5754 in Sulfuric Acid Solutions by Some Inorganic Inhibitors

2017 ◽  
Vol 231 (6) ◽  
Author(s):  
S.S. Abd El-Rehim ◽  
M.A. Deyab ◽  
H.H. Hassan ◽  
Ahamed Abd El-Moneim
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Aluminum Alloys ◽  
Electrochemical Impedance ◽  
Pure Aluminum ◽  
Solution Temperature ◽  
Acid Solutions ◽  
X Ray ◽  
Potentiodynamic Polarization Curves ◽  
Sulfuric Acid Solutions

AbstractThe corrosion of aluminum alloys (A5052 and 5754) in sulfuric acid solutions was investigated using potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), and energy-dispersive X-ray (EDX) methods. For comparison, the corrosion of pure aluminum in sulfuric acid was examined potentiodynamically. The data reveal that increasing sulfuric acid concentrations and solution temperature enhance the corrosion rate of aluminum alloys. The two aluminum alloys exhibit higher corrosion resistance than pure aluminum. Moreover, A5052 involves more corrosion resistance than A5754. The effect of WO

Corrosion of Refinery Equipment By Sulfuric Acid and Sulfuric Acid Sludges★

CORROSION ◽  
1954 ◽  
Vol 10 (11) ◽  
pp. 368-390 ◽  
Author(s):  
V. J. GROTH ◽  
R. J. HAFSTEN
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Laboratory Tests ◽  
Acid Solutions ◽  
Remedial Measures ◽  
Design Considerations ◽  
Petroleum Refineries ◽  
Sulfuric Acid Solutions ◽  
Economic Considerations ◽  
Selection Of

Abstract Characteristics of sulfuric acid solutions encountered in refineries, the types and kinds of containers, piping, valves, heaters and other equipment used to handle it are considered by the authors with respect to their corrosion resistance and certain other related qualities. Materials of construction for construction, fabrication and design details of the various vessels and equipment are discussed with relation to the several concentrations, temperatures, pressures, velocities and other peculiarities of the sulfuric acid solutions encountered in petroleum refineries. Results of field experience and laboratory tests are reported and recommendations are made respecting the selection of materials, optimum design, expected service life, maintenance procedures and economic considerations with respect to many materials. Precautions to be taken with welded and riveted tanks, fabrication and design considerations related to lead and other linings; examples of good and bad service and reasons for failures for containers, pipes, valves, pumps and heater coils are given. Galvanic effects encountered in connection with certain equipment are reported and remedial measures recommended. Figures showing examples of failures and charts and tables of data are included.

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