Go Back  Bike Forums > Bike Forums > Framebuilders
Reload this Page >

ED coating

Notices
Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

ED coating

Old 11-15-12, 11:22 AM
  #1  
mconlonx 
Str*t*gic *quivoc*tor
Thread Starter
 
mconlonx's Avatar
 
Join Date: Jun 2007
Posts: 7,552
Mentioned: 46 Post(s)
Tagged: 0 Thread(s)
Quoted: 7068 Post(s)
Liked 74 Times in 52 Posts
ED coating

So I see all kinds of marketing of new bike frames saying the frames are "ED coated", obviating the need for frame preserver on the inside tubes. All City comes to mind. Further research reveals that ED is electrophoretic deposition and is like a cross between metal plating and powder coating -- dip tank with paint in suspension, bike is charged one way or another, paint particles attract and stick to it.

I was thinking of having and older frame stripped and refinished and started looking around at ED vendors in my area. Not too many to be found, Hardford Finishing is closest to me.

But when they explain the process, I get to this part and it makes me wonder...:

"Ecoat does not protect inside tubes. As a rule, E-coating will only cover the inside of a part 2 times the width of the opening. Much like the Ventury effect in powder coating, the paint material does not attract inside an enclosed area."

So now I'm all kinds of confused, comparing claims of All City vs those of an ED vendor.

Not that it matters much. I'll probably not go this route, just curious about the difference in claims.
__________________
I know next to nothing. I am frequently wrong.
mconlonx is offline  
Old 11-15-12, 03:58 PM
  #2  
cycle_maven
Collector of Useless Info
 
Join Date: Aug 2009
Posts: 1,407
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
That can be explained by electric fields. The tube shields the external field, so the paint won't feel an electrostatic attraction while inside the tube. Except near the opening where the field can sneak in to a depth of about twice the diameter of the opening. So the paint won't stick unless it's near the opening.

All City probably sprays something else down the tubes.
cycle_maven is offline  
Old 11-16-12, 05:01 PM
  #3  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,318 Times in 828 Posts
American Motors had a tank to dip whole Nash-Rambler Bodies in to help rust resistance.

The dip tank for bike frames will be much smaller..
fietsbob is offline  
Old 11-16-12, 05:59 PM
  #4  
mconlonx 
Str*t*gic *quivoc*tor
Thread Starter
 
mconlonx's Avatar
 
Join Date: Jun 2007
Posts: 7,552
Mentioned: 46 Post(s)
Tagged: 0 Thread(s)
Quoted: 7068 Post(s)
Liked 74 Times in 52 Posts
While exploring options, I called up a local metal plater, asking about stripping and nickel plating and older frame. Wanted nothing to do with it, said gunk inside the tubes would contaminate his tank. Oh, well...
__________________
I know next to nothing. I am frequently wrong.
mconlonx is offline  
Old 11-17-12, 05:40 PM
  #5  
Falanx
THE Materials Oracle
 
Falanx's Avatar
 
Join Date: Feb 2006
Location: Finally... home :-)
Posts: 502

Bikes: Univega Alpina 5.1 that became a 5.9, that became a road bike... DMR TrailStar custom build

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
It's crap. E-coat, even in the car industry, is piss-awful as a standalone anticorrosion protection and only exists at all because its marketed by either the same companies that make paint for cars, or those working hand in glove with them. It's a primer, and only a good primer for the two-pack acrylic paints put on cars. Just an adhesion promoter that you can put on by dunking the monocoque,as opposed to laborious spray routines. Car bodies now rely on the total system protection - trimetal phosphate, then e-coat, then paint. They're harder to damage paint than hen panels were galvanized, phosphated then primed and painted, but the steel rusted much less when you inevitably scored the paint then than now. Toughness of the paint is irrelevant, when the likely cause of paint damage is stone chips which chew even polys, let alone acrylics.

If they offer Oxsilan, now that's a different question altogether ;-)
Falanx is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dion912
General Cycling Discussion
9
03-30-16 02:39 PM
IcySmooth52
Classic & Vintage
27
10-22-14 04:51 PM
2 Piece
Classic & Vintage
38
09-23-12 04:22 PM
rhnam
Classic & Vintage
17
04-25-12 07:06 PM
coco33
Classic & Vintage
12
02-09-10 01:01 PM

Posting Rules
You may not post new threads
You may not 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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.