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| Susceptibility to Hydrogen Embrittlement of E500 Steel for Vessel in Seawater |
| Received:August 21, 2016 Revised:February 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.02.002 |
| KeyWord:E500 steel hydrogen embrittlement cathodic protection potential |
| Author | Institution |
| LI Xiang-bo |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| MA Guang-yi |
Navy Equipment Repair Superintend Office for Qingdao District, Qingdao , China |
| CHEN Xiang-xi |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
| MA Li |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao , China |
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| Abstract: |
| Objective To study influences of cathodic protection potential on susceptibility to hydrogen embrittlement (HE) of E500 steel in seawater. Methods Different polarization activities were investigated in seawater through three electrode electrochemical system under slow strain rate tests and combined with scanning electron microscopy (SEM) of fracture surfaces. Results The susceptibility to hydrogen embrittlement of E500 in seawater increased with the decrease of cathodic protection potential. The fracture surface of specimen after slow strain rate test exhibited cleavage brittle fracture at -0.95 V (vs.SCE). E500 steel was subject to HE in sea water at -1.00 V. Conclusion According to the fitting curve of hydrogen embrittlement coefficient, when hydrogen embrittlement coefficient reaches 25%, the most negative cathodic protection potential for E500 steel should be -0.913 V. |
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