ADvertise hereStainLess Steel MediaGraf & SonsTitan Reloading
Lee PrecisionInline FabricationRotoMetals2

Results 1 to 14 of 14

Thread: question for chemst or platers on the boad

  1. #1
    Boolit Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    6,929

    question for chemst or platers on the boad

    Trying to find a relatively safe and available acid for Ecoating. Tried boric acid, didn't work. Process is to add acid & PC to water, boolits on a tray with electrodes attached. Supposed to give a nice even coating. Used a battery charger, don't want to go above 24VDC for safety. Didn't work. Conductivity of the fluid is too low, I need ~ 2 amps through the fluid - boolit resistivity is ~10 ohm so it's OK. Ascetic is supposed to be slightly better but I don't have any. Don't want to use a salt ( I will try NaCl). Lots of nasty stuff will work but I don't like playing with HCL or other expensive stuff. Any ideas?
    Thanks.
    Whatever!

  2. #2
    Boolit Master
    Join Date
    Feb 2009
    Location
    N. E. Ohio
    Posts
    886
    Try vinegar or you can try citric acid. Both are available in the grocery store.

  3. #3
    Boolit Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    6,929
    tried vinegar, nacl, both turn lead black but the + electrode had a tinge of white on it, I used the HF white for the test. It seems harder to scrape off from the + terminal. I did get 1/4 amp current @ 12 VDC.
    Whatever!

  4. #4
    Boolit Man Ateam's Avatar
    Join Date
    Mar 2017
    Location
    Northern MI
    Posts
    105
    i use baking soda in solution as my electrolyte when I am electrolysis cleaning metal detector finds. Dont know if that applies to your process or not.

  5. #5
    Boolit Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    6,929
    The goal of this experiment is to be able to dump a bunch in the tank, turn on the juice and then rinse & dry before bake. Supposed to get a nice consistent coating thickness with really no mess, no over spray or powder loss. I tried the electrostatic fluid bed that worked sometimes but was just as messy as spraying.
    I tried NaCl, vinegar, probably too acidic - lots of current when I got the charger clamp in the solution but not with just the boolits. May need ~100VDC to get it to work right but I would be concerned if others try it (shock hazard). It's a process used on wheels and most consumer (washer etc.) stuff now - the 'go to' process. I think lead is the problem, steel uses a Zn plating to get the conductance up.
    Hopefully I can get it to work.
    Whatever!

  6. #6
    Boolit Master
    Join Date
    Oct 2011
    Posts
    255
    Did it mention what strength of Acetic Acid was best?
    For in much wisdom is much grief: and he that increaseth knowledge increaseth sorrow. Ecclesiastes 1:18
    He that troubleth his own house shall inherit the wind: and the fool become servant to the wise of heart. Proverbs 11:29
    ...Verily I say unto you, Inasmuch as ye have done it unto one of the least of my brethren, ye have done it unto me. Matthew 25:40


    Carpe SCOTCH!

  7. #7
    Boolit Master

    farmerjim's Avatar
    Join Date
    Nov 2012
    Location
    St. Francisville, Louisiana
    Posts
    1,101
    Try a thin copper plate coat to get the conductance of the lead up.
    There is no difference between communism and socialism, except in the means of achieving the same ultimate end: communism proposes to enslave men by force, socialismóby vote. It is merely the difference between murder and suicide. Ayn Rand

  8. #8
    Boolit Master
    Join Date
    Nov 2015
    Location
    Alabama
    Posts
    230
    In electrolitic rust removal Washing soda is used to make the solution more conductive it might be worth a try. Found next to washing powder in grocery store.

  9. #9
    Boolit Bub
    Join Date
    Apr 2015
    Posts
    49
    Am I understanding correctly that the OP is trying to use powder Paint in an electocoat bath application???

    Sent from my SM-G900V using Tapatalk

  10. #10
    Boolit Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    6,929
    Yes, called ecoat used in commercial powder coating.Current through water charges the powder which then sticks to the electrode. Then dry and cook.
    Whatever!

  11. #11
    Boolit Bub
    Join Date
    Apr 2015
    Posts
    49
    I think you may have a few technologies crossed here. powder coat uses electrostatic spray to increase transfer efficiency. This is sometimes called "ecoat", but not often. The most common use of "ecoat" is electrodeposition coating, in which a part is dipped in a "bath" of waterborne paint. A charge is passed through the bath and paint particles deposit onto the part. However, unless there has been a major technology breakthrough in the past few years, powder coat Paint will not work in an ecoat bath.

    Ecoat works because the paint micells destabilize when the electicity flows threw the electrode (part) and the paint particle deposited on the part. If you don't design the paint from the resin up as a water reducible material, it won't work.

    Sent from my SM-G900V using Tapatalk

  12. #12
    Boolit Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    6,929
    Like ESPC, the paint takes a charge from the fluid, for ESPC it's air, for ecoat it's water. If you have experience and know of a better (specialized) powder I'm listening.
    Whatever!

  13. #13
    Boolit Bub
    Join Date
    Apr 2015
    Posts
    49
    Sorry, powder paint won't take any significant charge in water to be transported to the surface of the object to be painted Especially considering that espc guns operate at high hundreds to thousands of volts of potential to impart that charge. Water dissapates this charge very quickly, especially since your only going to tens of volts. That coupled with the high viscosity of water will make coating pretty much impossible.

    Electodeposition Paint is NOT a powder based paint. The polymers in true ecoat are formulated from the ground up to form micells in water when properly neutralized with acid for cathodic ecoat, or base (usually amine) for anodic ecoat.

    No amount or type of acid will result in powder coat being able to be deposited from a liquid bath.

    Sent from my SM-G900V using Tapatalk

  14. #14
    Boolit Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    6,929
    Any suggestions on powder to use? Sherwin-Williams?
    Whatever!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check