×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

How to protect steel from molten aluminum?

How to protect steel from molten aluminum?

How to protect steel from molten aluminum?

(OP)
Hello,
I would like to inquire on the feasibility and cost-effectivity of
tiling by ceramic materials a large and massive mild steel
implement used to remove dross and to stir molten aluminum
in a melting furnace. The area to be covered would be in
excess of 1.3 square meters.

Presently the mild steel is hardfaced by welding with a 12% Cr
steel. While the performance is adequate for a long time in a
pure molten aluminum bath, it is measured in only a few days
in alloyed aluminum bathes.

The refractory bricks used in the furnace itself are probably not
usable for this application. A brief search seemed to show that
the following materials could possibly be available in the form
of thin tiles, and should be resistant to molten aluminum:
graphite, AlN , Si3N4, Al2O3, sialons.
Which material should be selected?

If feasible, the tiles should possibly be fixed in place with a high
temperature resistant structural adhesive. The molten aluminum
is at about 800 deg C. (Tiles on the Space Shuttle and their
adhesive see possibly higher temperature).
Which adhesive would be suitable?

The joints between tiles should be sealed (made impervious) to
molten aluminum to preserve the mild steel.
Which material should be used for sealing?

Expert opinions would be appreciated.
Thanks,

http://www.welding-advisers.com/

RE: How to protect steel from molten aluminum?

Another idea is to look into higher Cr overlay.  I have seen some very low C, 26% Cr alloys used in some molten metal applications.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources