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The effect of hydrogen on pitting corrosion susceptibility of duplex stainless steel was investigated. Pits are observed on the hydrogen-charged specimen after 6days of immersion in 6% FeCl 3 solution, while no pits on the uncharged specimen even after more than 30days of immersion, which indicates that hydrogen promotes pitting initiation and pit growth. Moreover, pitting susceptibility increases...
The influence of the hydrogen charging on the pitting corrosion in duplex stainless steel was investigated by the scanning Kelvin probe PROBE force microscopy. The Volta potential maps of the hydrogen charged sample revealed that some low potential areas emerged at the ferrite/austenite boundaries or inside the ferrite phases, which may be considered as preferential nucleation sites of pitting corrosion...
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