Research of Hydrogen Atom Penetration during the Phosphorization Process of High-Strength Steel

2014 ◽  
Vol 540 ◽  
pp. 35-38
Author(s):  
Yu Su Song ◽  
Li Qing Zhou ◽  
Guang Zhe Chu
Keyword(s):  
Hydrogen Atom ◽  
Hydrogen Embrittlement ◽  
Metal Surface ◽  
High Strength Steel ◽  
Steel Surface ◽  
Hydrogen Permeation ◽  
High Strength ◽  
Hydrogen Gas ◽  
Hydrogen Atoms ◽  
Permeation Experiment

The hydrogen residued process of the High-strength steel surface during the phosphorization process was studied. By the hydrogen permeation experiment, that penetration speed of the hydrogen residued in the metal surface were measured. The result of shows:the more hydrogen gas generated in the process of phosphorization,the more hydrogen atom inside the metal. That means the hydrogen embrittlement criticality of the High-strength steel were more fearful。Dense phosphorizing film always block hydrogen atoms to penetrate into the metal,So that cuold to reduce the hydrogen embrittlement extend of the steel in phosphorization.

scholarly journals Effects of Adding CO2 to Low Level H2S Containing Aqueous Environments on the Corrosion and Hydrogen Penetration Behaviors of High-Strength Steel

2021 ◽  
Vol 59 (8) ◽  
pp. 533-544
Author(s):  
Seung Min Ryu ◽  
Jin-seong Park ◽  
Hye Rin Bang ◽  
Sung Jin Kim
Keyword(s):  
Aqueous Solution ◽  
High Strength Steel ◽  
Hydrogen Permeation ◽  
High Strength ◽  
Steel Sample ◽  
Aqueous Environment ◽  
Hydrogen Atoms ◽  
Low Level ◽  
Low Concentrations ◽  
Hydrogen Penetration

The effects of adding CO2 to low level H2S containing aqueous environment on the corrosion and hydrogen penetration behaviors of high-strength steel were evaluated using a range of experimental and analytical methods. The corrosion rate of the steel sample exposed to a low level of H2S dissolved in an aqueous solution was comparatively higher than the one exposed to a mixture of low concentrations of H2S with CO2 dissolved in the aqueous solution. The higher corrosion resistance of the steel in the mixture of low concentrations of H2S and CO2 was attributed primarily to the three-layer structure of corrosion scale, comprised of an outer Fe-oxide, middle FeS1-X, and inner FeCO3, which formed on the steel sample. In particular, the formation of a thin FeCO3 layer with protective and non-conductive nature may serve as an effective barrier against the penetration of aggressive ionic species in solution, as well as hydrogen atoms formed by cathodic reduction or hydrolysis reactions. Consequently, the hydrogen permeation level, which was measured in a mixture of low-level H2S and CO2, was controlled to a comparatively lower value. Nevertheless, the higher level of hydrogen permeation in a mixture of low levels of H2S and CO2 at the early corrosion stage might increase the potential risk of pre-mature failure by hydrogen-assisted cracking.

Elimination of Rusting Layer from High-Strength Steel Surface Using Different Laser Cleaning Methods

2019 ◽  
Vol 46 (7) ◽  
pp. 0702003
Author(s):  
雷正龙 Zhenglong Lei ◽  
孙浩然 Haoran Sun ◽  
陈彦宾 Yanbin Chen ◽  
田泽 Ze Tian
Keyword(s):  
High Strength Steel ◽  
Steel Surface ◽  
High Strength ◽  
Laser Cleaning ◽  
Cleaning Methods
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