Etchant causing rusting

Discussion in 'The Projects Forum' started by pilko, Feb 17, 2014.

  1. pilko

    Thread Starter Active Member

    Dec 8, 2008
    213
    20
    Hi everyone,

    Since I have been using Muriatic acid and Hydrogen peroxide for etching, my tools have started to rust.
    I am going to store one or both of the solutions in an air-tight container.
    Which solution is causing the problem?

    pilko
     
  2. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
    2,503
    380
    hi pilko,
    Ferric Chloride etch-ant also rusts steel tools, I believe its the acid content of the liquids.
    E
     
  3. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,788
    945
    acid and oxygen.

    both are death to iron.

    antirust compounds wear off and then those two elements destroy iron. I recommend using lanolin. it will last longest and provides great protection to metal
     
  4. pilko

    Thread Starter Active Member

    Dec 8, 2008
    213
    20
    Thanks for the replies.
    Do I need to store both fluids in sealed containers?
     
  5. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,753
    760
    Just keep them away from metal
     
    spinnaker likes this.
  6. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    The acid is the big culprit, I wrap a papertowel tightly around the lid and tape it in place. then for good measure I double bag it, with a toilet paper bag of bicarbonate in the middle bag.

    I described the problem in How I make PCBs

    All etchants do it.
     
  7. pilko

    Thread Starter Active Member

    Dec 8, 2008
    213
    20
    Thanks Bill and R!f,
    The strange thing is that both bottles have screw caps.

    @ Bill --- What is the purpose of the paper towel ?
     
  8. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,884
    1,004
    Duh. right?

    I store mine under the sink. Mix as needed. Unmixed both can be useful products around the house.

    I etch in the bathroom since that mixture does not stain like muratic acid (yes I am single :)).

    Actually since switching from muratic acid, I have far less issues with rust.
     
  9. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,753
    760
    I was just saying u know.
     
  10. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,884
    1,004
    Yes was agreeing with you. Sad that you need to state the obvious. ;)
     
  11. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,753
    760
    Good ! I always wanna make sure.

    I am not an Englishman. I am a fisherman
     
  12. burger2227

    Member

    Feb 3, 2014
    190
    24
    Peroxide is an oxidant as you can see from the air bubbles. Any acid is bad for steel tools. I like to pour vegetable oil on pliers every once in a while to keep the joint from rusting too.

    Take care of your tools as you will be lost to your own device if you abuse them or lose them...
     
  13. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    Some kinds of corrosive liquids can creep out the smallest gap as vapours, or maybe as ions when the conditions in the air are right.

    Metals magically attract them even over some distance.

    Sorry maybe it is incorrect not ions but it has baffled me a few times.

    Or if there is no air circulation, the reaction of a few molecules creates a tiny bit circulation to attract more vapours.

    I don't know exactly.
     
Loading...