Misterg
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- North Wales
So area is 1230cm² roughly so about 7 or 8 amps would do it?
If that's both sides, then yes, that's what I'd shoot for.
1 1/2 to 2 hrs.
So area is 1230cm² roughly so about 7 or 8 amps would do it?
I can see the voltage dropping which is wrong.
checked resistance with multimeter. First part was mostly around 900k ohm, good, thats what I assume it would be touching the surface.
Second part readings were odd, meter may have got wet but it was showing negative resistance in places, odd, is my meter scrap..
I warmed up the dye, possibly too hot, they went in at around 80c.
In theory I can just strip then off and start again. I may need to tig a new connection.Might be worth making up a few (say 50x25mm) test coupons to prove out the process before committing to parts.
I notice my tig filler has been eaten in places - possibly where I moved the part and had fresh alu exposed, allowing all the current to eat that low resistance area before it can build up a coating, is that possible?
Yes but they are tig'd on after stripping with naoh.- you're not re-using the hanger wire, are you? If it's been anodised,
That looks like the surface wasn't "scrupulously" clean, any kind of contamination will give poor OR AWFUL results!Waste of an evening After 2 hours, rinsed, checked resistance with multimeter. First part was mostly around 900k ohm, good, thats what I assume it would be touching the surface.
Second part readings were odd, meter may have got wet but it was showing negative resistance in places, odd, is my meter scrap... I warmed up the dye, possibly too hot, they went in at around 80c.
View attachment 325458
After half hour colour did not take rinsed off
View attachment 325459
Questuoning if this is a problem with the dye or my anodising. Try the cherry red, it took some colour, quite uneven. I gave the smaller part a squirt with spray bottle and some came off. Tried to seal..
View attachment 325460
View attachment 325461
Rubbish. There is a surface texture on the dyed areas and Im almost wondering if my previous parts are anodised or, is it some kind of surface coating sitting on top? However this rubs off and the other parts dont..
Nope it was perfectly clean. Soap degrease, brake cleaner, naoh dip, rinse, then acid, all wearing gloves.That looks like the surface wasn't "scrupulously" clean, any kind of contamination will give poor OR AWFUL results!
If I wanted to climb trees I'd use my climbing gear lol. Here's my original prototype from an old chopping board to show what it's for.Dog poobag holder? I hope its not for hanging to trees.
Yes if you can find it, 15% will be ok. You can evaporate some water off if you want more concentrated.
"Ph minus" NaHSO4 seems to work but I havent tried normal sulphuric yet. It is a *lot* cheaper.
I use lead on a personal setup, but you might be better avoiding lead if it's a commercial operation to simplify waste disposal. I believe aluminium also works well (6063 seems to be often recommended). I would aim for a cathode area of at least ~1/3 of your max intended anodising area. Power supply sounds spot-on.Is there a better/best option for the cathode?
Is there a better/best option for the cathode?
Is there anything else I'm likely to need?
Even the basic, low current density, anodising being discussed above makes the surface far, far more durable than bare metal.I'm not wanting colour, just the change in surface hardness.