jhanko
Enlightened
I need to anodize a small complex heatsink I made. I made it out of 6061-T6 Al. I already destroyed one of these with a stupid *** mistake (more on that later). It took four hours to make another one and I don't want to screw this one up. I'm anodizing it solely for electrical isolation. It will not be dyed. Just anodized & sealed. Here is my concern: The heatsink has several 0-80 holes tapped in it. Will anodizing ruin these small threads? Ideally, I would like the oxide layer to tighten up the fit of the screws a little.
The first heatsink I screwed up was by just not thinking. I was using the 12amp per square foot rule. I estimate the total suface area of the heatsink to be 2 square inches. When I converted the square ft. to square in., I divided by 12, not 144. Again, a stupid *** mistake that cost me four hours. I ended up pumping 2 amps through it for 45 minutes. When it was done, the sink was slightly smaller and the screws slid right through the threaded holes.
Here is what I plan to do with this one. 20% sulfuric acid, constant current 170ma for 45 minutes, then boil to seal. How does this sound? Will the threads survive? Any insight would be appreciated. Thanks!
The first heatsink I screwed up was by just not thinking. I was using the 12amp per square foot rule. I estimate the total suface area of the heatsink to be 2 square inches. When I converted the square ft. to square in., I divided by 12, not 144. Again, a stupid *** mistake that cost me four hours. I ended up pumping 2 amps through it for 45 minutes. When it was done, the sink was slightly smaller and the screws slid right through the threaded holes.
Here is what I plan to do with this one. 20% sulfuric acid, constant current 170ma for 45 minutes, then boil to seal. How does this sound? Will the threads survive? Any insight would be appreciated. Thanks!
