Hey yall, ive anodized 20 or so parts now, and have gotten a couple good results, but would like to see better.
I have a couple anodized parts that were bead blasted, sadly, the bead blast that i used was contaminated with steel, leaving a pitted surface
I want to etch it out to raw aluminum with sodium hydroxide, the anno thickness is somwhere between .0005 and .00075in. How long should i leave it in there for to etch to raw aluminum?
Im just looking for a good guess.
Also, if i had a brand new, just off the mill machined part, how long should i leave it in the sodium hydroxide for a satin finish part?
I dont want to leave it too long and have it start attacking my parts.
Lastly, I have bought fume suppressant from caswell, however I am getting a smell and have already started wearing a mask after using the product. When the parts are in the anno bath, there is a layer of foam which is supposed to suppress the fumes, but i feel like it has made it worse. If you guys have any insight that would be great.
fume suppressant link