Influence of the amount of ferric/ferrous ions on the corrosion resistance of a NiCrMo alloy in high-temperature sulfuric acid solutions

2016 ◽  
Vol 67 (9) ◽  
pp. 952-957 ◽  
Author(s):  
M. Lindgren
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
High Temperature ◽  
Acid Solutions ◽  
Ferrous Ions ◽  
Sulfuric Acid Solutions

High-temperature inhibitor of steel corrosion in sulfuric acid solutions

2010 ◽  
Vol 46 (7) ◽  
pp. 782-787 ◽  
Author(s):  
Ya. G. Avdeev ◽  
P. A. Belinskii ◽  
Yu. I. Kuznetsov ◽  
O. O. Zel’
Keyword(s):  
Sulfuric Acid ◽  
High Temperature ◽  
Steel Corrosion ◽  
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.

Synergistic effect of cupric and ferrous ions on active-passive behavior in anodic dissolution of chalcopyrite in sulfuric acid solutions

2004 ◽  
Vol 74 (1-2) ◽  
pp. 103-116 ◽  
Author(s):  
Naoki Hiroyoshi ◽  
Shigeto Kuroiwa ◽  
Hajime Miki ◽  
Masami Tsunekawa ◽  
Tsuyoshi Hirajima
Keyword(s):  
Sulfuric Acid ◽  
Synergistic Effect ◽  
Anodic Dissolution ◽  
Acid Solutions ◽  
Ferrous Ions ◽  
Passive Behavior ◽  
Sulfuric Acid Solutions

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 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
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