Caswell Inc. Metal Finishing Forums  

Go Back   Caswell Inc. Metal Finishing Forums > Anodizing Questions
Connect with Facebook


Anodizing Questions Discussion board for anodizing questions.

Closed Thread
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 05-01-2008, 08:22 AM
jsu jsu is offline
Newbie
 
Join Date: May 2008
Posts: 2
jsu is on a distinguished road
Default Part wont retain dye

Hey everyone, i started anodizing a few months ago as a supplement to my hobbies. basically recently i have been doing parts and when iam done dying they look very nice and actually seem to have a satin texture when dry. basically after boiling the part (ive tried long periods aswell) it seems to retain the color until you go at it with a cloth. then half ~ of it comes off. any ideas on how to stop this? thanks!
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
  #2 (permalink)  
Old 05-01-2008, 09:18 AM
Z Z is offline
Amateur Metal Finisher
 
Join Date: Oct 2006
Posts: 70
Z is on a distinguished road
Default Re: Part wont retain dye

Have you tried dumping your sealer tank and starting a new one? Sounds kinda like the dye could be leaching into the sealer bath.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
  #3 (permalink)  
Old 05-01-2008, 10:16 PM
acidrain's Avatar
Metal Finishing Guru
 
Join Date: Sep 2004
Posts: 1,181
acidrain has a spectacular aura aboutacidrain has a spectacular aura about
Default Re: Part wont retain dye

Before you dump the sealer, are the wires anodizing? Usually when the dye won't take, it's because you lost connection sometime during the run. In that case, the aluminum hanging wires will ano, but not the parts.
__________________
I do things.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
  #4 (permalink)  
Old 05-02-2008, 06:30 AM
jsu jsu is offline
Newbie
 
Join Date: May 2008
Posts: 2
jsu is on a distinguished road
Default Re: Part wont retain dye

the aluminum is taking some dye. the wires are anodizing. however the problem is that the dye wipes off. If the aluminum wasnt anodizing the dye wouldnt sick at all and would wash off.

as for the sealer iam using water and have changed it many times.

thanks!
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
  #5 (permalink)  
Old 05-02-2008, 09:07 AM
Z Z is offline
Amateur Metal Finisher
 
Join Date: Oct 2006
Posts: 70
Z is on a distinguished road
Default Re: Part wont retain dye

check your anodizing parameters. You could be forming a soft-coat usually caused by high temperature, high concentration, or too low current. Soft coatings can wipe right off after sealed.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
  #6 (permalink)  
Old 05-02-2008, 12:03 PM
destroyer125's Avatar
Experienced Metal Finisher
 
Join Date: Jul 2005
Posts: 447
destroyer125 is an unknown quantity at this point
Default Re: Part wont retain dye

Sounds like dissolution. You will get excellent dye absorbtion, then after seal, you can whipe the coating off with your finger quite easily. Keep tabs on your anodizing time and temperature of the tank while your doing parts.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
  #7 (permalink)  
Old 05-04-2008, 01:54 AM
sswee's Avatar
Moderator
 
Join Date: Nov 2004
Location: close to Austin, Texas
Posts: 1,368
sswee is a jewel in the roughsswee is a jewel in the roughsswee is a jewel in the roughsswee is a jewel in the rough
Default Re: Part wont retain dye

What power supply is being used and what current density are the parts run at?
SS
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
  #8 (permalink)  
Old 06-14-2008, 09:14 PM
Newbie
 
Join Date: Jun 2008
Posts: 5
dd016857 is on a distinguished road
Default Re: Part wont retain dye

I am a newbie too , had this same problem..read somewhere that the temperature has to be below 20 deg C mine was 22 deg C and color would wipe off. As my tank is only a 1 gallon size I use a sealed 1 pint soda pop bottle of water that was frozen the night before and a small glass fish tank thermometer, Place the bottle upright behind the part being ano and use a small plastic paddle to agitate....works like a charm
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Closed Thread

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
one part just wont strip mkriegs Anodizing Questions 2 02-20-2008 01:20 PM
How big a part? charliewolfe Electroplating Questions 2 02-07-2007 11:30 PM
Sax keys wont plate dshook Electroplating Questions 1 06-02-2006 05:06 PM
powder wont take charge? red99ls1ta Powder Coating Questions 4 02-27-2004 07:18 PM
Apply Zincate but flash copper wont stick gevalia Electroplating Questions 5 09-16-2003 07:09 PM


All times are GMT -4. The time now is 01:37 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.3.0
Copyright © Caswell Inc.