dissimilar metals - engineers pls help - Router Forums
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 08-16-2010, 02:31 PM Thread Starter
Registered User
 
allthunbs's Avatar
 
Join Date: Jun 2008
Country: Canada
First Name: Ron
Posts: 2,881
 
Default dissimilar metals - engineers pls help

I remember that stainless steel screws and steel don't mix in damp environments. However, I can't remember if aluminum and steel also suffer dissimilar metal characteristics. I'm trying to rebuild the bottom of my patio door and I need to refasten the tracks. The screws were completely gone.

Thanks for the help

Allthunbs
allthunbs is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 08-16-2010, 03:07 PM
Registered User
 
RJM60's Avatar
 
Join Date: Apr 2010
Country: United States
First Name: Robert
Posts: 655
 
Default

Quote:
Originally Posted by allthunbs View Post
I remember that stainless steel screws and steel don't mix in damp environments. However, I can't remember if aluminum and steel also suffer dissimilar metal characteristics. I'm trying to rebuild the bottom of my patio door and I need to refasten the tracks. The screws were completely gone.

Thanks for the help
Stainless steel screws in an aluminum frame should be fine. Aluminum is so active (anodically) that it will form a protective oxide coating in minutes. Stainless steel is also rendered realatively inactive through passivation. Stainless steel fasteners in aluminum is a commonly used system.
RJM60 is offline  
post #3 of 6 (permalink) Old 08-16-2010, 05:21 PM Thread Starter
Registered User
 
allthunbs's Avatar
 
Join Date: Jun 2008
Country: Canada
First Name: Ron
Posts: 2,881
 
Default

Thanks very much RJM. Stainless in Aluminum it is then.

Allthunbs
allthunbs is offline  
Sponsored Links
Advertisement
 
post #4 of 6 (permalink) Old 08-16-2010, 07:12 PM
Registered User
 
RStaron's Avatar
 
Join Date: Sep 2009
Country: United States
First Name: Ron
Posts: 366
 
Default

I agree with RJM60. Stainless fasteners in Alum. is the way to go.

A person can never have too many tools!
RStaron is offline  
post #5 of 6 (permalink) Old 08-25-2010, 03:10 PM
Registered User
 
Join Date: Jan 2010
Country: United Kingdom
First Name: Mike
Posts: 12
 
Default Galvanic

Hi Ron,
Galvanic bi metalic corrosion can occur between stainless steel and aluminium, ref nobility table.
On aircraft construction for instance a barrier is made between the two surfaces if disimilar metals are to be in contact.......
However as it's only the patio door it;s not likely to experience speeds of mach 2!!!!!
I wouldn't worry about it.
Shortcut is offline  
post #6 of 6 (permalink) Old 10-05-2010, 07:03 PM
Registered User
 
Join Date: Aug 2007
Country: United States
First Name: Thrifty
Posts: 240
 
Default

Quote:
Originally Posted by allthunbs View Post
I remember that stainless steel screws and steel don't mix in damp environments. However, I can't remember if aluminum and steel also suffer dissimilar metal characteristics. I'm trying to rebuild the bottom of my patio door and I need to refasten the tracks. The screws were completely gone.

Thanks for the help
Try Brass screws
Thrifty Tool Guy is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome