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Old 15th February 2009, 06:38 PM   #11
Renron is offline Renron  United States
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Big Bear,

Zinc Phosphate is a "conversion coating" which is applied either with a sprayer or wipe on. (I use an old clean T-shirt) I'm cheap. It is NOT a paint, Don't use Zinc primer under Powder Coating, it will outgas and peel.
It can be used on any metal surface prior to Powder Coating (PC).
The Zinc Phosphate is a phenomenal rust inhibitor and adhesion promoter, it is the same as "bluing" used on firearms. Good stuff.
I bought mine from an auto paint supply store. Kragens or Grand Auto won't have it. A quart was ~$16, and I suspect I will never have to buy more in my lifetime. A little goes a long way. After application set time ~1 - 2 minutes, it is rinsed off under tap water. Some prefer to use Deionized Water, if I were doing it commercially I would use DI water.

It is called Zinc Phosphate!

The PC equipment I purchased from HF is NOT variable HV, I have not found the need for variable voltage yet. I'm just a hobbiest.
I suppose you could use a Variac to adjust the voltage if needed, I have not tried that yet. The only thing the "box" does is supply low amperage high voltage to charge the powder inside the gun while spraying powders.

I have used several types of powders and I like TGIC polyesters the best. Good weather resistance, ease of application, good corner adhesion, flexible with a durable finish. Lays down nice and provides a smooth professional finish. Not as good at chemical resistance as an epoxy. Epoxy's are brittle and harder to spray a good finish with, but are a great insulator. I used an epoxy on my Aikido Preamp build...still in progress. I'll put up a pic later today.

Ever done any PCing yourself?

Ron
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Old 16th February 2009, 03:51 AM   #12
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I thought that was what you were talking about... now I have to ask which store in specific did you find the Zinc Phosphate?

I've never seen it around here...

I've never done any Powder Coating, have had some done by professional powerdercoaters... but visited someone whose small biz is doing it and I was impressed by the results. It gives a nice finish that is good in many ways. It does seem "thick" compared to a lacquer for example, but not every finish is good for every circumstance, and Powder Coat seems like a very good option to have available!!

I'll check out the HF gun next time I visit their store...
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Old 26th December 2012, 11:51 PM   #13
dback is offline dback  United States
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I will be trying this mod. Just bought a harbor freight gun and ready to give it a try!

Thanks to everyone for the postings.
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Old 25th October 2016, 04:11 AM   #14
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This is one of the coolest mods I have seen! It works great. Thanks!
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Old 5th November 2016, 03:25 AM   #15
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Ummm....if you don't need another new hobby....

For amp top plates and smallish boxes just take it to your local metal finisher who runs black nearly every day of the week and ask him to toss yours in with a production run.

I show him it's a hobby piece; I've never paid more than 20 bucks and once for free.
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Old 6th November 2016, 02:50 PM   #16
Renron is offline Renron  United States
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Bill,
That's great. I'm glad you can get it done for a good price. Not all of us have Powder Coaters that will do it inexpensively.
You MUST remember this is DIY after all.
What's wrong with another new hobby? Why limit your knowledge to simply a few fields?
It's relatively inexpensive to PC small pieces at home (<$80) and you don't have to wait on someone else's schedule or drive there.
I'm not really sure why you posted in this old thread, but the process is fun, easy and cheap. Plus its DIY.
Ron
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Old 6th November 2016, 04:06 PM   #17
anatech is offline anatech  Canada
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Hi Renron,
Quote:
I'm not really sure why you posted in this old thread, but the process is fun, easy and cheap.
This is actually preferred to starting a new thread. It keeps the knowledge in one spot and people can read back to see what options there are.
Quote:
What's wrong with another new hobby? Why limit your knowledge to simply a few fields?
Your suggestion is also worth considering. Some folks have to divide limited time, so you can't expect everyone to learn absolutely everything related to their hobby. I have that problem too. Then there is the fact that married people need time for their partners as well.

-Chris
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Old 7th November 2016, 06:22 PM   #18
Renron is offline Renron  United States
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Chris,
Please explain to me what BillEpstein added to the relevancy of this thread. Its about learning to powder coat at home...IF YOU WANT TO!!!
If someone doesn't want to learn (or want to make the time to learn) Powder Coating, then why post paying someone else is cheap? Why bother?
Also; "so you can't expect everyone to learn absolutely everything related to their hobby."
Why did you present this as I EXPECTed everyone to learn absolutely everything related to their hobby? WTF? Putting words into my mouth (post) is bad form for a Moderator.
Don't want to know how to PC yourself? Fine. Move along. Don't turn this into a cable thread.
Don't waste your time.
Ron
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Old 7th November 2016, 09:20 PM   #19
anatech is offline anatech  Canada
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Hi Ron,
I am in agreement that if you have the time and energy, learning a new skill is good. However, your comments seemed to suggest that everyone should do it at home themselves. Bill made an excellent suggestion for those of us who simply do not have the time or opportunity to do as you suggest at home. Now they are all aware that there are two options for having something powder coated inexpensively. That was your goal, wasn't it?
Quote:
WTF? Putting words into my mouth (post) is bad form for a Moderator.
I did not put any words into your mouth, you simply didn't like what I had to say. As for being a moderator, I am also a normal member (with extra work to do). When any of us (moderators) are acting as a moderator, you will see the symbol displayed.

You asked, I answered. Your comments were unfair to Bill who suggested an alternative. Now you will have more folks who consider having a nice finish done and may then decide to do it themselves after trying to go Bill's route. Besides, I found this thread interesting.

Cable thread? Are you suggesting that I involve myself in messing up cable threads as a rule? I think you just attributed something to me that is untrue. Nice.

-Chris
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Old 7th November 2016, 10:58 PM   #20
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Mmmm, zinc phosphate is very dangerous to the environment. That means normal civilians can not get it here, specialised companies can. It is a class H410 stuff.
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