Predicting the kinetics of hydrogen generation at the tips of corrosion fatigue cracks

1988 ◽  
Vol 19 (7) ◽  
pp. 1795-1806 ◽  
Author(s):  
A. Turnbull ◽  
M. Saenz Santa Maria
Keyword(s):  
Corrosion Fatigue ◽  
Hydrogen Generation ◽  
Fatigue Cracks ◽  
Kinetics Of

Investigation and modeling of the kinetics of the development of corrosion-fatigue cracks

1978 ◽  
Vol 13 (3) ◽  
pp. 235-239
Author(s):  
N. N. Vasserman ◽  
V. A. Merkushev ◽  
M. S. Nemanov
Keyword(s):  
Corrosion Fatigue ◽  
Fatigue Cracks ◽  
Kinetics Of

scholarly journals Reliability Estimation of Transport Means Elements Under the Action of Cyclic Loads and Corrosive Environment

2018 ◽  
Vol 15 (4) ◽  
pp. 5793-5802
Author(s):  
P. V. Popovych ◽  
Volodymyr Dzyura ◽  
O. S. Shevchuk
Keyword(s):  
Fracture Mechanics ◽  
Corrosion Fatigue ◽  
Residual Life ◽  
Fatigue Cracks ◽  
Reliability Estimation ◽  
Analytical Models ◽  
Cyclic Loads ◽  
Corrosive Environment ◽  
17G1s Steel ◽  
Kinetics Of

The approach for determining the residual life of the vehicles’ thin-walled metal elements with cracks under the action of cyclic loads and corrosive environment is developed based on the first law of thermodynamics and the fracture mechanics principles. Based on the results of the mathematical description of electrochemical reactions and separate data of fracture mechanics, the equation describing the kinetics of the corrosion-fatigue cracks propagation is deduced. This equation and the initial and final conditions are a mathematical model for determining the residual life of structural elements. The correctness of the developed analytical models is confirmed by the experimental data known in the literature. The performance of this model is demonstrated on the example of determining the residual life of a plate made of 17G1S steel. The plate was diluted by a crack in a 3% NaCl solution and subjected to cyclic loading. An increase in the initial size of corrosion-fatigue cracks is significant to reduce the period of their subcritical growth.

Influence of heterocyclic nitrogenous bases contained in a hydrogen sulfide medium on the kinetics of corrosion fatigue cracks in 40Kh steel

1980 ◽  
Vol 16 (2) ◽  
pp. 167-170
Author(s):  
M. O. Levitskii ◽  
V. M. Zhovnirchuk ◽  
Yu. G. Skrypnik ◽  
Yu. I. Babei
Keyword(s):  
Hydrogen Sulfide ◽  
Corrosion Fatigue ◽  
Fatigue Cracks ◽  
40Kh Steel ◽  
Kinetics Of ◽  
Hydrogen Sulfide Medium

Engineering Ru atomic structures toward enhanced kinetics of hydrogen generation

2021 ◽  
Vol 235 ◽  
pp. 116507
Author(s):  
Wenzhao Fu ◽  
Qianhong Wang ◽  
Wenyao Chen ◽  
Gang Qian ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Atomic Structures ◽  
Kinetics Of

Effect of strain frequency on development of corrosion-fatigue cracks in 08KP steel

1975 ◽  
Vol 10 (3) ◽  
pp. 345-346
Author(s):  
M. O. Levitskii
Keyword(s):  
Corrosion Fatigue ◽  
Fatigue Cracks ◽  
08Kp Steel ◽  
Strain Frequency

Lifetime Enhancement of Propulsion Shafts Against Corrosion-Fatigue by Laser Peening

2018 ◽  
Author(s):  
Lloyd A. Hackel ◽  
Jon E. Rankin
Keyword(s):  
Corrosion Fatigue ◽  
Fatigue Testing ◽  
Salt Water ◽  
Fatigue Cracks ◽  
Water Immersion ◽  
High Energy ◽  
General Corrosion ◽  
Laser Peening ◽  
Corrosion Pits ◽  
Deep Pits

This paper reports substantially enhanced fatigue and corrosion-fatigue lifetimes of propulsion shaft materials, 23284A steel and 23284A steel with In625 weld overlay cladding, as a result of shot or laser peening. Glass reinforced plastic (GRP) coatings and Inconel claddings are used to protect shafts against general corrosion and corrosion pitting. However salt water leakage penetrating under a GRP can actually enhance pitting leading to crack initiation and growth. Fatigue coupons, untreated and with shot or laser peening were tested, including with simultaneous salt water immersion. Controlled corrosion of the surfaces was simulated with electric discharge machining (EDM) of deep pits enabling evaluation of fatigue and corrosion-fatigue lifetimes. Results specifically show high energy laser peening (HELP) to be a superior solution, improving corrosion-fatigue resistance of shaft and cladding metal, reducing the potential for corrosion pits to initiate fatigue cracks and dramatically slowing crack growth rates. At a heavy loading of 110% of the 23284A steel yield stress and with 0.020 inch deep pits, laser peening increased fatigue life of the steel by 1370% and by 350% in the corrosion-fatigue testing.

The reduction mechanism and kinetics of Fe2O3 by hydrogen for chemical-looping hydrogen generation

2017 ◽  
Vol 129 (3) ◽  
pp. 1831-1838 ◽  
Author(s):  
Yidi Wang ◽  
Xinyue Wang ◽  
Xiuning Hua ◽  
Chaocheng Zhao ◽  
Wei Wang
Keyword(s):  
Hydrogen Generation ◽  
Chemical Looping ◽  
Reduction Mechanism ◽  
Mechanism And Kinetics ◽  
Chemical Looping Hydrogen Generation ◽  
Kinetics Of

scholarly journals Study of Hydrogen Generation of Aluminum-Containing Compositions with Boric Acid

2018 ◽  
Vol 3 (3) ◽  
pp. 230
Author(s):  
Salakhova A.A. ◽  
Suvorov V.A. ◽  
Firsova A. I. ◽  
Belozerov V.I. ◽  
Milinchuk V.K.
Keyword(s):  
Boric Acid ◽  
Hydrogen Generation ◽  
Sodium Metasilicate ◽  
Chemical Processes ◽  
System Management ◽  
Control Rod ◽  
Radiation Fields ◽  
Fuel Elements ◽  
And Control ◽  
Kinetics Of

The results of investigations of the kinetics of hydrogen generation compositions with aluminum, chemical activators (hydrated sodium metasilicate, oxide and calcium hydroxide) boric acid. Aluminium and its alloys used for the manufacture of protective sheaths of fuel elements and control rod protection system management, pipelines, tanks, and various support structures in the active zone of atomic reactors RBMK, research water-cooled reactors. The aluminum is protected from direct contact with water and steam surface layer of metal oxide having a high corrosion resistance at high temperatures in powerful radiation fields. However, after removal or when the discontinuity of the oxide layer of activated metal efficiently decompose water to hydrogen. It is established that the hydrogen aluminum-containing compositions is dependent on the concentration of boric acid. The discovery of the involvement of boric acid in these reactions expands the ideas about regularities of chemical processes of formation of hydrogen flowing in the water coolant of VVER reactors with the participation of the corrective additives and impurities.

scholarly journals KINETICS OF FATIGUE CRACKS IN THE ROTOR BLADES OF THE MI-171 HELICOPTER

2019 ◽  
Vol 7 (1) ◽  
pp. 116-122
Author(s):  
V. Yu. Kurokhtin ◽  
Keyword(s):  
Fatigue Cracks ◽  
Rotor Blades ◽  
Kinetics Of
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