An Evaluation of Hydrogen Evolution from Corrosion of Carbon Steel in Low/Intermediate Level Waste Repositories

1994 ◽  
Vol 353 ◽  
Author(s):  
Fumio Matsuda ◽  
Ryutaro Wada ◽  
Kazuo Fujiwara ◽  
Ai Fujiwara
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Hydrogen Evolution ◽  
Hydrogen Gas ◽  
Intermediate Level ◽  
Evolution Rate ◽  
List Type ◽  
Gas Evolution ◽  
Hydrogen Evolution Rate ◽  
Waste Repositories

AbstractAs a sequence of studies to evaluate the quantity of gas evolution from low/intermediate level waste repositories,hydrogen gas evoluted from corrosion of carbon steel in simulated repository environment was evaluated by laboratory experiments. The experimental results on the hydrogen gas evolution both in air purging condition simulated oxidizing environment and nitrogen purging condition simulated reducing environment, are summarized as follows.(1)Hydrogen gas evolution enough to analyze quantitavely by gas chromatography (>5ppm) has been recognized under almost all test conditions except reducing equilibrium cement water.(2)Effects of purging gas (air,nitrogen) on the hydrogen gas evolution and the corrosion rate calculated from weight loss were air purge > nitrogen purge. On the other hand, the contribution ratio of hydrogen evolution reaction in corrosion rate was nitrogen purge > air purge.(3)Effects of test solution on the hydrogen evolution rate were as fo11ows. • Air Purge :Equilibrium Bentonite Water ≈ Equilibrium Cement Water > Synthetic Sea Watert• N2 Purge:Synthetic Sea Water > Equilibrium Bentonite Water >> Equilibrium Cement Water(4)No distinct effect of crevice geometry of test specimen on hydrogen evolution rate was recognized. Only under the reducing equilibrium cement water, however, the increase of hydrogen evolution was confirmed after the immersion of several hundred hours.(5)Hydrogen evolution rates tended to decrease with testing time except in the reducing equilibrium cement water.(6)No distinct difference of hydrogen evolution rate between steels (SPHC, SPCC) was observed.

Role of hydrogen evolution rate in determining the corrosion rate of extruded Mg–5Sn–(1–4wt%)Zn alloys

2014 ◽  
Vol 89 ◽  
pp. 275-285 ◽  
Author(s):  
Heon-Young Ha ◽  
Jun-Yun Kang ◽  
Chang Dong Yim ◽  
Jie Yang ◽  
Bong Sun You
Keyword(s):  
Corrosion Rate ◽  
Hydrogen Evolution ◽  
Evolution Rate ◽  
Hydrogen Evolution Rate ◽  
Zn Alloys

Significant improvement of photocatalytic hydrogen evolution of diketopyrrolopyrrole-based donor–acceptor conjugated polymers through side-chain engineering

2019 ◽  
Vol 10 (47) ◽  
pp. 6473-6480 ◽  
Author(s):  
Ruimin Diao ◽  
Haonan Ye ◽  
Zhicheng Yang ◽  
Shicong Zhang ◽  
Kangyi Kong ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Conjugated Polymers ◽  
Hydrogen Evolution ◽  
Evolution Rate ◽  
Side Chain ◽  
Photocatalytic Hydrogen Evolution ◽  
Hydrogen Evolution Rate ◽  
Donor Acceptor

The hydrogen evolution rate of PDPP3B-O4 with butoxy chain was 5.53 mmol h−1 g−1 with 1% Pt loading (λ > 400 nm), increased 110 times than PDPP3B-C8 with octyl chain due to wider absorption spectrum and better wettability via side chain engineering.

The effect of molecular structure and fluorination on the properties of pyrene-benzothiadiazole-based conjugated polymers for visible-light-driven hydrogen evolution

2018 ◽  
Vol 9 (35) ◽  
pp. 4468-4475 ◽  
Author(s):  
Chang Cheng ◽  
Xunchang Wang ◽  
Yaoyao Lin ◽  
Luying He ◽  
Jia-Xing Jiang ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Visible Light ◽  
Conjugated Polymers ◽  
Hydrogen Evolution ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Evolution Rate ◽  
Fluorinated Polymer ◽  
Hydrogen Evolution Rate ◽  
Visible Light Driven

The linear non-fluorinated polymer L-PyBT exhibited an impressive hydrogen evolution rate up to 83.7 μmol h−1 under visible light irradiation.

Efficient electrocatalytic hydrogen gas evolution by a cobalt–porphyrin-based crystalline polymer

2018 ◽  
Vol 47 (26) ◽  
pp. 8801-8806 ◽  
Author(s):  
Yanyu Wu ◽  
José M. Veleta ◽  
Diya Tang ◽  
Alex D. Price ◽  
Cristian E. Botez ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Aqueous Media ◽  
Crystalline Polymer ◽  
Hydrogen Gas ◽  
Gas Evolution ◽  
Polymeric System ◽  
Cobalt Porphyrin

Herein, we report a crystalline CoTcPP-based [TcPP = the anion of meso-tetra(4-carboxyphenyl)porphyrin] polymeric system, 1, as a hydrogen evolution reaction (HER) electrocatalyst in acidic aqueous media.

Substituent effect of conjugated microporous polymers on the photocatalytic hydrogen evolution activity

2020 ◽  
Vol 8 (5) ◽  
pp. 2404-2411 ◽  
Author(s):  
Xiaomin Gao ◽  
Chang Shu ◽  
Chong Zhang ◽  
Wenyan Ma ◽  
Shi-Bin Ren ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Substituent Effect ◽  
Evolution Rate ◽  
Photocatalytic Hydrogen Evolution ◽  
Microporous Polymers ◽  
Hydrogen Evolution Rate ◽  
Conjugated Microporous Polymers

The influence of substituent groups on the photocatalytic activity of conjugated microporous polymers was investigated, and a high photocatalytic hydrogen evolution rate of 18.93 mmol h−1 g−1 was achieved by PyDF with fluorine atoms.

Corrosion Behavior Improvements of High Active Aluminum Alloy Anode in Alkaline Solution by Adding Inhibitors

2007 ◽  
Vol 546-549 ◽  
pp. 1153-1158 ◽  
Author(s):  
Shu Quan Liang ◽  
Yong Zhang ◽  
Yan Tang ◽  
Shao Qiang Li ◽  
Xiao Pin Tan
Keyword(s):  
Aluminum Alloy ◽  
Hydrogen Evolution ◽  
Alkaline Solution ◽  
Electrode Potential ◽  
Evolution Rate ◽  
Positive Direction ◽  
Alloy Anode ◽  
Hydrogen Evolution Rate ◽  
Active Aluminum ◽  
Aluminum Alloy Anode

The Na2SnO3 and H-N-R inhibitors effects on the high active aluminum alloy in alkaline solution (805mol/LNaOH) have been systematically studied by hydrogen collection and electrochemical measurement in the present investigation. The results showed that the hydrogen evolution rate was low at the value of 0.404 mL/ (min·cm2) in alkaline solution with 0.01mol/L Na2SnO3, but the electrode potential was only -1.515Vvs.SCE and it moved to the positive direction seriously; When adding 10wtH-N-R and 0.01mol/LNa2SnO3 into the alkaline solution simultaneously, the aluminum alloy anode had a lower hydrogen evolution rate of 0.342mL/ (min·cm2) and a more negative electrode potential of -1.591Vvs.SCE. The electrochemical performance of aluminum alloy anode has been improved greatly by the cooperation of H-N-R and Na2SnO3.

Achieving an unprecedented hydrogen evolution rate by solvent-exfoliated CPP-based photocatalysts

2020 ◽  
Vol 8 (12) ◽  
pp. 5890-5899 ◽  
Author(s):  
Jing-Zhao Cheng ◽  
Li-Lin Liu ◽  
Guangfu Liao ◽  
Zhao-Qi Shen ◽  
Zhi-Rong Tan ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Evolution Rate ◽  
Photocatalytic Hydrogen Production ◽  
Hydrogen Evolution Rate

Solvent-exfoliated CPP-based photocatalysts have been innovatively used for photocatalytic hydrogen production with an unprecedented HER of up to 303.7 mmol h−1 g−1.

Effects of Cold-Rolled Deformation on the Electrochemical Performance of Al Anode Materials

2011 ◽  
Vol 287-290 ◽  
pp. 2522-2525 ◽  
Author(s):  
Jun Guang He ◽  
Jiu Ba Wen ◽  
Xu Dong Li
Keyword(s):  
Electrochemical Performance ◽  
Hydrogen Evolution ◽  
Anode Materials ◽  
Cast Alloy ◽  
Evolution Rate ◽  
Electrochemical Tests ◽  
Hydrogen Evolution Rate ◽  
Cold Rolling Reduction ◽  
Metallographic Observation ◽  
Cold Rolled

The influence of cold rolled deformation on the electrochemical properties of Al anode materials in 4 mol L-1 KOH solutions was investigated by electrochemical tests and metallographic observation. The results indicate that cold rolled process could improve the electrochemical performance of Al anode alloys compared with that of as-cast alloy. With the increase of deformation, the self-corrosion rate and hydrogen evolution rate of Al anode decreased firstly and then increased slightly. The alloy with 80% cold rolling reduction had the lower self-corrosion and hydrogen evolution rate, longer discharge time and good electrochemical performance.

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