Journal
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
Volume 51, Issue 3, Pages 163-170Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/1743278215Y.0000000043
Keywords
Heat treatment; Hydrogen permeation; High strength steel; Splash zone corrosion; Microstructure
Funding
- Jiangsu Provincial Natural Science Foundation [BK2012649]
- National Natural Science Foundation of China [41276087]
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Effect of heat treatment on the hydrogen permeation behaviour of AISI 4135 steel was studied by electrochemical method under simulated splash zone conditions. The hydrogen permeation current reached maximum at dry stage and the amount of hydrogen permeated showing a maximum in sixth cycle. Moreover, it was found that the amount of hydrogen permeated through specimen with bainitic microstructure was lower than that in other specimens. The average value of charge transfer resistances for heat treated specimens A, B, C and D exhibit no significant differences under nature sea water film. Moreover, the heat treatments have no prominent impact on corrosion products from the X-ray diffraction (XRD) pattern and SEM analysis. Therefore, the differences in hydrogen permeation behaviours were mainly attributed to the microstructures of specimens other than the differences in corrosion behaviour.
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