×
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

aluminum vs. steel plate in corrosive atmosphere?

aluminum vs. steel plate in corrosive atmosphere?

aluminum vs. steel plate in corrosive atmosphere?

(OP)
Currently we have 3 large crude oil storage tanks with internal floating roofs, each has a 3' x 3' inspection hatch on the outer roof in order to look for excess oil which may have escaped and is sitting on the floating roof.  The hatch itself is carbon steel which is extremely heavy.  Would there be any issue of converting the steel hatch to an aluminum hatch in order to cut down on the weight of it.  Could I encounter any significant problems with having two dissimilar metals in a somewhat potentially corrosive atmosphere (H2S)?

RE: aluminum vs. steel plate in corrosive atmosphere?

The hatch may be designed to lift in the event of overpressure, I would check the original design before making any changes. If you do change, be sure to insulate the Al from the CS to prevent galvanic corrosion of the AL.

Most floating roofs are Al so the enviroment should be fine.

RE: aluminum vs. steel plate in corrosive atmosphere?

(OP)
The hatch is simply there to allow a means of looking in and inspecting the floating roof.  Should I be concerned with anything else?

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