Aim of this work is to point out the applied cathodic potential and strain rate effect on the hydrogen diffusion and embrittlement of two micro alloyed steels. Two high strength pipeline steel have been investigated: a traditional hot rolled pipeline steel, with a ferritic-pearlitic micro-structure, and a new developed high strength steel, with a ferritic-bainitic microstructure. Hydrogen diffusion was evaluated by means of current permeation tests in absence of load, on specimens strained with a static load and during slow strain rate tests. All the tests were performed in 3.5% NaCl solution, imposing potential of -1.05 and 2 V vs SCE. The results pointed out a better performance of new and higher strength steel, in spite of its higher mechanical properties: these results can be explained in terms of different microstructure and different hydrogen diffusion behaviour.
Hydrogen diffusion and hydrogen embrittlement behaviour of two high strength pipeline steels
Wasserstoffdiffusions- und Wasserstoffversprödungsverhalten zweier hochfester Pipelinestähle
2001
10 Seiten, 9 Bilder, 3 Tabellen, 18 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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