[blackcote]

What's considered a chloride? and how does it get to my tanks? Can a black oxide line contribute to this? We run a large hot black oxide line in the same building, but not at the same time and we keep lids on all the tanks containing anodizing chemicals when not in use. Not air tight but fully covered. Edit: I guess this is where it could be as we use sodium chloride for blackening. Is there anyway I could check for chloride levels to know when to change it out... as building another building is not an option. Edit: My bad, we actually use sodium hydroxide.

Although we're using a plastic tank for all tanks, can you explain your thoughts or facts on chlorides in the sealer causing pitting?

Can I rule out leaving it in the cleaner too long? We use the sp degreaser.