Magnetite

noriega
(not verified)
Posted in: , on 20. Feb. 2002 - 17:20

Could anyone explain the penetration of magnetite ( from the protective oxide film) through the grain boundaries of the inner surface in a low carbon steel ( SA213 T11) of a superheater.

It could be related with the spheroidization of pearlite ??.

Thanks in advance. ■

Iron & Steel
Metallurgie
Antworten
Login to add a Reply

Magnetite Penetration

Erstellt am 15. Apr. 2004 - 05:29

i believe you are refering to a form of interganular corrosion.

magnetite might be forming in the intergranular boundaries , do you have a metalurgical microscope picture or a SEM ? to take a look, i am no metalurgist but have several friends that are and rate between the best.

we have worked in superheaters for hidrogen co mixtures for 25 years and they have developed severall treatments to disolve carbides and reduce or eliminate metal dusting , so they might be usefull.

regards

marco ■

TECMEN Consultant in: Sponge Iron (DRI) handling Sponge Iron DRI Automated Storage Firefighting and Root Cause Analysis Pneumatic Conveying Consultants Phone 5281 8300 4456.