Revue des sciences et sciences de l’ingénieur
Volume 1, Numéro 2, Pages 23-27
2011-12-01
Effet De La Morphologie De La Martensite Sur Le Comportement à La Corrosion De L’acier Dual-phase De Nuance X52
Auteurs : Omar Allaoui . Sami Zidelmel .
Résumé
The aim of this investigation concerns the effect of martensite morphology on the corrosion behaviour of dual phase microstructure obtained by intermediate quenching (IQ) and step quenching (SQ) of X52 low carbon micro alloyed steels. The IQ treatment results in formation of fine martensite morphology uniformly distributed in the ferrite matrix. In contrast, SQ treatment yields blockly and banded martensite and ferrite morphology. Corrosion resistance was measured by weight loss in 1 N HCl- H2SO4 and H3PO4 acid solution. The experimental results show that steels with banded microstructures are likely to corrode faster than the steels with finely dispersed microstructures. A carefully conducted comparison of the weigh loss mesurment of the representative samples obtained after immersed in desired acid.
Mots clés
Dual phase steel, Martensite morphologie, Corrosion
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